300 blackout vs 556 - 300 Blackout vs 5.56: NOT Even Close? Banana Ballistics. 75.2K subscribers. Subscribed. 8.5K. 372K views 3 months ago #midwayusa. On this episode …

 
Mar 10, 2023 · It’s an extremely capable bullet diameter, and its versatility really shines in the .300 Blackout. The Blackout has a 34.7mm case length, hence the “x35” in 7.62x35. This is shorter than the 5.56 NATO’s 45mm. Ten millimeters were lopped off the top of the 5.56 case to make room for the oversized .30-caliber slugs. . Flights from nyc to cartagena

3 Sept 2016 ... Muzzle energy of 77 gr 5.56 vs various .300 BLK rounds? · 03-09-2016 | 1:44 PM · robert101 · The formula is Energy (Ft-lbs) = bullet wt.X ...For hunting, both the .300 BLK and .223/5.56 are limited to about 100 yards on most deer-sized game using the proper bullets. Despite what you hear today from the 6.5mm crowd, small bullets are still small bullets and a 5.56mm isn’t really ethical past 100 yards on a deer, but is fine on smaller game at longer distances.An AR-15 pistol in .300 Blackout, especially with subsonic loads, solves a lot of those issues. Because it was designed from the start to be suppressed, subsonic loads in this caliber pack a ...Jul 26, 2013 · The 300 BLK’s muzzle energy out of a nine inch barrel was within 100 fps of the 62 grain 5.56 coming out of a 16 inch barrel and when compared to the 62 grain 5.56 out of the 10 inch barrel, it was no contest. The 55 grain .223 bullet isn’t even in the game when compared to the performance of the 300 BLK. Unless your hunting, suppressing, and/or sbr id go 556. 300 would be a waste if thoes arent your plans ... Supersonic, 300 blackout is slower than 7.62 x 39 but has a much wider bullet selection due to being a .308 vs .311 bullet. 300 blackout has the single advantage of being very quiet with subsonic loads, and letting you swap mags and have a 2200 FPS …BUT the 300 blackout is a cut down 5.56 case and necks it up to 7.62mm. edit* AND that took 5 seconds to google search! Reply reply ... 556 and 223 are the same thing 556 is just the NATO specification. 300blk does work in ar style rifles but requires a diffrrent barrel but aside from all that your asking us about some mods gun and ammo descriptions lol …Both are good options no doubt. For hunting 300blk for sure. For home defense if you're worried about over penetration, then I would lean towards 5.56mm. I find ...Jul 3, 2023 · The .300 BLK, on the other hand, is a larger diameter round that is often slower but hits with more ft-lbs on target. The 300 blackout is also a much better round when it comes to suppressing. Let’s talk about super and subsonic ammo. 300 blackout vs 556 Power and Range. Both 5.56 and 300 blackout have been extensively tested. What testing ... Re: Questions about pressure 300BLK vs. 556/223. by 300Blk » Tue Dec 06, 2011 1:35 pm. 1. Yes. 2. Same as 223. Less than 5.56mm. 3. More velocity if you loaded it to 5.56mm pressure, but bolt velocity would speed up also, which effects feeding reliability.Yes, .300 Blackout ammunition can fit in a 5.56 magazine due to the similar dimensions of the cartridges. However, it is important to note that using a 5.56 magazine with .300 Blackout ammo may affect reliability and cause feeding issues, so it is generally recommended to use dedicated .300 Blackout magazines for optimal performance.Oct 4, 2023 · Supersonic Blackout ammunition was optimized for 9-inch barrels, and does much better than 5.56x45mm NATO when your barrel length is measured in single digits. Tarr recently built up this 300 BLK pistol with an 8.3-inch barrel, and it’s tipped with a Silencer Central Banish 30 suppressor. (Firearms News photo. Ammo. 300 AAC Blackout Vs. 5.56 NATO: The Ultimate Breakdown. firearmreview January 28, 2021 2 Comments. There’s a lot of confusion, …Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch …The 308 Winchester is a full powered rifle round that was designed in 1952. It case length of 51mm and uses a 30 caliber projectile. Light loaded rounds like a 125 spitzer round cna reach speeds of 3,100 feet per second. The 300 Blackout is derived from the 300 Whisper and received a SAAMI spec in 2011.May 19, 2023 · Ideally, one should compare ballistics when the loads are at least very similar, and when it comes to 5.56 NATO and 300 BLK, they’re just not the same. A big part of that is the difference in bullets. 5.56 NATO bullets average between 45 grain and 69 grain while 300 BLK bullets average between 90 grain and 200 grain. May 19, 2023 · Ideally, one should compare ballistics when the loads are at least very similar, and when it comes to 5.56 NATO and 300 BLK, they’re just not the same. A big part of that is the difference in bullets. 5.56 NATO bullets average between 45 grain and 69 grain while 300 BLK bullets average between 90 grain and 200 grain. For this load, the 350 Legend will have a muzzle velocity of 2,325 fps and muzzle energy of 1,800 ft-lbs according to Winchester’s data. In comparison, the same load in 300 Blackout will have a muzzle velocity of 1,900 fps and muzzle energy of 1,200 ft-lbs. The 350 Legend is clearly superior in terms of muzzle velocity and energy. In .300 Blackout vs 5.56 NATO the limitations of the .300 BLK are, again, primarily based on capacity and bullet weight. It gets worse, though. You can chamber a .300 Blackout round in a 5.56/.223 ...Oct 25, 2020 · By this logic alone, 300 Blackout rounds are better than 5.56. Tumbling and fragmentation increase the size of the wound, but the 300 BLK will always have a slight size advantage over the 5.56. When comparing the same bullet design, M855A1 vs M80A1, the 30-caliber cartridge is superior. Don’t get me wrong, both will kill. The AR is chambered for 5.56/.223, but .300 Blackout is a popular alternative cartridge. Here is the history of .300 Blackout vs 5.56 NATO.So let’s dive into the 300 Blackout vs 308 vs 7.62×39 debate as it relates to shorter barrels. The 300 Blackout vs 308 vs 7.62×39 in Short Barrels. First, they inquired about well-known and widely manufactured calibers. The Whatoozy 7000 may be the perfect caliber according to you, but if no one makes a wide variety of ammo for it, it’s useless for …Kaboom!!! 300 BLK in 5.56/223 AR-15! Some unfortunate shooters have learned the hard way that is is possible to fire a 300BLK in a rifle chambered for 5.56mm or 223 Remington. The results of such a dangerous event are spectacular. In this post, we’ll take a look at a rifle that detonated as a result of this. My friend was a first hand witness ...May 5, 2023 · The Popular 300 Blackout. This bullet is an American variant of a 223 conversion. It is a larger caliber bullet in a smaller capacity shell. It comprises the 233 shell casing that was cut down, resized, and inserted with a 30 caliber bullet. In other words, you have the same 30 caliber round that the 7.62×39 has. Jan 22, 2023 · Mid Range (300-600m) Shooting. . The short version is, the 5.56 is more accurate and better at extended range, while the .300 BLK has more of an impact on organic targets at close range, and works better with a suppressor. The big thing to keep in mind is that there’s no one round to rule them all here. Aug 11, 2017 · To better understand the differences between 5.56 NATO/.223 Rem. vs. .300 BLK, a bit of history is warranted. The 5.56 NATO/.223 Rem. hearkens back to the U.S. Army’s search for a lighter ... In today's video, we will be comparing the performance of the 5.56 NATO to the 300 Blackout on mild steel. These cartridges are very similar in length but ar...CMMG here: https://bit.ly/3cHkvMpPinty reflex site: https://amzn.to/2PY3WlxTruly appreciate you watching the videos!!!WTW shirts!!! - https://bit.ly/2W68GqpH...Compare the two popular AR-15 calibers based on their history, ballistics, strengths and weaknesses. Learn how to choose the best round for hunting, target …The 7.62x39 has an average BC of 0.27. Some of the heavier subsonic bullets for 300 Blackout have extremely high BC, such as the 208 gr Hornady 300 Blackout ammo (A-Max), at 0.648. However, 300 BLK ammo has a BC around 0.35 in general. Although the two rounds have similar bullet weights (123 vs 125 gr), the 300 BLK is typically loaded with ... 5.56 NATO. Short barrel life due to high velocity and pressure. Compromises on stopping power at an increasing range. Prohibited in many states for hunting CXP2 or bigger game. Best For. 300 Blackout. The …Re: Questions about pressure 300BLK vs. 556/223. by 300Blk » Tue Dec 06, 2011 1:35 pm. 1. Yes. 2. Same as 223. Less than 5.56mm. 3. More velocity if you loaded it to 5.56mm pressure, but bolt velocity would speed up also, which effects feeding reliability.Both are good options no doubt. For hunting 300blk for sure. For home defense if you're worried about over penetration, then I would lean towards 5.56mm. I find ...When it comes to ensuring uninterrupted power supply during blackouts or emergencies, whole house generators are a popular choice. These powerful machines can provide electricity t...Nov 7, 2023 · The 5.56 NATO pushes lighter bullets at faster velocities, while the 300 Blackout launches heavier bullets at moderate and subsonic velocities. Ballistically, these cartridges are not in the... The .300 BLK, on the other hand, is a larger diameter round that is often slower but hits with more ft-lbs on target. The 300 blackout is also a much better round when it comes to suppressing. Let’s talk about super and subsonic ammo. 300 blackout vs 556 Power and Range. Both 5.56 and 300 blackout have been extensively tested. What …5 Feb 2023 ... I wanted you to show the difference between the 2 mags so you understand why you might be having issues. if Yes you can still shoot 300 ...When it comes to preparing for unexpected power outages, investing in an emergency home generator is a smart decision. These generators are designed to provide power to essential a...0/9 inch barrel 115grain 300BLK (supersonic) out actually come out 300 ft-lbs more than 556. You'll notice later in the post I say .300blk in supersonic is better than 5.56 in an SBR, but the OP specifically asked for SUBSONIC .300blk. ... In a standard 16" barrel, supersonic .300 Blackout has more muzzle energy than supersonic 55gr 5.56 and supersonic m855 …A power generator can be a lifesaver during a blackout. Learn if a portable or automatic standby generator is right for your home. Expert Advice On Improving Your Home Videos Lates...The .300 AAC Blackout is the cartridge built to function in the AR-15 platform, and with its design comes a different mindset, as the cartridge is called upon to fill a special role. As a hunting cartridge, the .300 BLK certainly doesn’t look like one of the usual suspects; it is a stubby little guy, definitely lacking the look of a long ...23 May 2015 ... 300 blk is worth the extra cost any extra benefits? Will a .300blk double for a good hunting cartridge? Did anyone else have a hard time finding ...28 Dec 2023 ... .300 AAC Blackout: Developed in the early 2010s by Advanced Armament Corporation (AAC), the 300 Blackout was designed to provide improved ...The 5.56mm NATO and .300 AAC Blackout (commonly known as 300 Blackout) are two different rifle cartridges with distinct characteristics.The Custom .300 Blackout is available in both rifle and braced pistol configurations. They come with free-floated M-LOK rails, a 3.5-pound flat-face trigger, Magpul furniture, and a set of MBUS sights to top it off. What you end up getting is a well-made, practical rifle that’s just waiting for a suppressor.Mar 10, 2023 · It’s an extremely capable bullet diameter, and its versatility really shines in the .300 Blackout. The Blackout has a 34.7mm case length, hence the “x35” in 7.62x35. This is shorter than the 5.56 NATO’s 45mm. Ten millimeters were lopped off the top of the 5.56 case to make room for the oversized .30-caliber slugs. This is one of the newest and most revolutionary weapon and ammo configuration adopted by the US military. 300 blackout and the MCX weapon is a specialized t...PEST CONTROL!Weapon - 300 blackout suppressed Ammo - Freedom Industries 110 gr v-max bullets Vehicle - Polaris rangerSize. The 6.5 Grendel and the .300 Blackout have the same exact length, at 2.26”. the diameter of the .300 Blackout is just a bit larger, at 0.308” compared to the Grendel’s 0.264”. Both calibers have a variety of bullet weights on the market, but the 6.5 Grendel generally has lighter bullets than the .300 Blackout can offer.May 5, 2023 · The Popular 300 Blackout. This bullet is an American variant of a 223 conversion. It is a larger caliber bullet in a smaller capacity shell. It comprises the 233 shell casing that was cut down, resized, and inserted with a 30 caliber bullet. In other words, you have the same 30 caliber round that the 7.62×39 has. BUT the 300 blackout is a cut down 5.56 case and necks it up to 7.62mm. edit* AND that took 5 seconds to google search! Reply reply ... 556 and 223 are the same thing 556 is just the NATO specification. 300blk does work in ar style rifles but requires a diffrrent barrel but aside from all that your asking us about some mods gun and ammo descriptions lol …The .300 BLK, designed by Advanced Armament Corp., wasn't designed as a hunting cartridge but as a round to provide extra punch via more bullet weight over the 5.56 mm, while still working within the dimensions of the AR-15 and M4 carbines. The round has been well received for that.Kaboom!!! 300 BLK in 5.56/223 AR-15! Some unfortunate shooters have learned the hard way that is is possible to fire a 300BLK in a rifle chambered for 5.56mm or 223 Remington. The results of such a dangerous event are spectacular. In this post, we’ll take a look at a rifle that detonated as a result of this. My friend was a first hand witness ...Nov 24, 2020 · Looking for a product featured in this video? YouTube prevents us from posting links. Head over to our website to find what you're looking for.Check out our ... 21 Dec 2022 ... As the 300 Blackout bullet will be heavier, it will generally have higher recoil than the 223 Rem. On average over several supersonic loadings, ...Nov 15, 2023 · The 300BLK round offers the same energy as 5.56mm but with a shorter barrel (while staying quieter). In addition, 300BLK rifle upper assemblies can be paired with any AR-15 lower assembly and in most cases is compatible with 5.56mm magazines. The upgrade process is easy and can be done without the need for an armorer. Fun Gun Reviews Presents: "300 AAC Blackout : What's the Big Deal?" We take a look at the 300 AAC Blk and compare it to the 5.56 and 7.62x39 rounds. Plus wha...One lower, 2 uppers, 1 supressor. 7" 300blk Upper with 1/5 twist barrel and Q Cherry Bomb, 10.3" 5.56 upper with Rearden flash hider and adjustable gas block so that it can be shot unsupressed or with the 30 cal supressor. Very modular and handy setup.5 Dec 2011 ... Questions about pressure 300BLK vs. 556/223 ... I have a few questions about the pressure of 300 AAC Blackout: 1) I've read that SAAMI maximum ...So let’s dive into the 300 Blackout vs 308 vs 7.62×39 debate as it relates to shorter barrels. The 300 Blackout vs 308 vs 7.62×39 in Short Barrels. First, they inquired about well-known and widely manufactured calibers. The Whatoozy 7000 may be the perfect caliber according to you, but if no one makes a wide variety of ammo for it, it’s useless for …The M4E1 in .300 BLK comes available in 8, 10, and 16-inch barreled options. A 10-inch barrel on an AR pistol or a short-barreled rifle is perfect for the .300 BLK. The uppers all feature different-length handguards that accommodate the mounted flash suppressor. Aero AR-15 10.5″ Pistol.Re: Questions about pressure 300BLK vs. 556/223. by 300Blk » Tue Dec 06, 2011 1:35 pm. 1. Yes. 2. Same as 223. Less than 5.56mm. 3. More velocity if you loaded it to 5.56mm pressure, but bolt velocity would speed up also, which effects feeding reliability.Learn how 300 Blackout and 556 are similar and different in design, dimensions, and performance. Find out the advantages and disadvantages of each …The 7.62x39 has an average BC of 0.27. Some of the heavier subsonic bullets for 300 Blackout have extremely high BC, such as the 208 gr Hornady 300 Blackout ammo (A-Max), at 0.648. However, 300 BLK ammo has a BC around 0.35 in general. Although the two rounds have similar bullet weights (123 vs 125 gr), the 300 BLK is typically loaded with ... Aug 9, 2021 · In terms of downrange energy and power, the 7.62X39 is the better performing cartridge. A 123 grain 7.62 Russian produces over 1,500 pounds of energy at the muzzle, while a 150 grain supersonic 300 BLK produces just over 1,200. The 7.62 is also cheaper, more abundant, and chambered in the most popular rifle around the world the AK-47. May 8, 2018 · Effective Range. Though the 5.56 has a greater range (500 yards compared to 300 yards), the .300 blk is more effective when it comes to hunting. Weight. The .300 BLK is filled with 110 to 220 grain bullets while the 5.56 sports 40 to 77 grain. This makes the 5.56 approximately 40% lighter than the .300. Availability. Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch …ll cover my custom 300 blackout build, shooting it suppressed using the surefire SOCOM 300sps and subsonic ammunition. This is by far the quietest AR I own a...The .300 Blackout uses a much shorter (1.368-inch) case compared to the HAMR’s 1.603-inch case. The short Blackout case was designed to allow for the use of the long and heavy bullets that made ...When it comes to preparing for unexpected power outages, investing in an emergency home generator is a smart decision. These generators are designed to provide power to essential a...CMMG here: https://bit.ly/3cHkvMpPinty reflex site: https://amzn.to/2PY3WlxTruly appreciate you watching the videos!!!WTW shirts!!! - https://bit.ly/2W68GqpH...The .300 Blackout and 5.56mm (.556) are both popular rifle cartridges used in firearms. While they may appear similar, there are some notable differences between the two. The .300 Blackout is known for its versatility, as it can be used in both supersonic and subsonic loads, making it suitable for both short-range and long-range shooting.The .300 Blackout is a game-changer, offering a bridge between the popular .223 and 7.62 rounds. Developed by Advanced Armament Corporation (AAC) in collaboration with Remington Defense. This round brings exceptional performance and compatibility to the AR-15 platform for shooting suppressed using subsonic ammo in the range of 190 to 230 …When it comes to ensuring uninterrupted power supply during blackouts or emergencies, whole house generators are a popular choice. These powerful machines can provide electricity t...3-in-1 flashlights make blackouts and camping a lot more convenient. Visit HowStuffWorks to learn all about 3-in-1 flashlights. Advertisement Flashlights are so ubiquitous and so u...The .300blk from a 9in barrel has basically identical terminal performance to a 5.56 from a 14in barrel, but gives up longer range (200y+) performance and accuracy, AND projectile selection to do that. But probably not identical terminal performance out of a similar length barrel. 5" ain't nothin'.Smoke. The .223/5.56 case is almost the same as the .300 Blackout. The .300 Blackout is just a little shorter & opened up to hold a .308 projectile. If you have .223/5.56 cases you can cut them off at the shoulder, lube them up & run them through a .300 Blackout sizing die to make the .308 neck, then cut to length.Learn the differences between the 300 Blackout and the 5.56 NATO cartridges for the AR-15 platform. Compare their physical attributes, power, and …300 Blackout Vs 556:Performance And Design. 300 BLK is designed to be used with a suppressor and has a lower velocity and higher energy than 5.56mm at close range. 5.56mm has a flatter trajectory and higher velocity, making it better suited for longer-range engagements.The .308 Winchester (.308 Win) and 5.56 NATO rounds are two of the most popular centerfire rifle cartridges in the United States and across North America. Both cartridges are battle-proven and currently in service with the U.S. Military and its NATO allies. The 308 vs 556 debate has been raging between civilian marksman, law enforcement, and military …The 300 Blackout (300 BLK) and the 8.6 Blackout (8.6 BLK) are both innovative ammunition rounds that serve distinct purposes. Here’s a breakdown of their key differences: Caliber Size: The 300 Blackout is a .30 caliber round, effectively a 7.62mm projectile. The 8.6 Blackout, on the other hand, is an 8.6mm projectile, which makes it …May 19, 2023 · Ideally, one should compare ballistics when the loads are at least very similar, and when it comes to 5.56 NATO and 300 BLK, they’re just not the same. A big part of that is the difference in bullets. 5.56 NATO bullets average between 45 grain and 69 grain while 300 BLK bullets average between 90 grain and 200 grain.

9 Nov 2023 ... Comments17. Jordan Wiser. You also need to take into account that subsonic 300blk may not cycle your rifle if it's under gassed.. Best torrent site for movies

300 blackout vs 556

5.56x45mm NATO and 300 Blackout (BLK) are cartridges that both see extensive military and law enforcement use. 5.56 NATO has a lengthy history stretching …Dec 27, 2021 · Considering that the 300 Blackout cartridge was designed with a specific application in mind: engagements within 300 yards, most likely at night, and using a suppressed firearm, we'd expect it to outperform 5.56. Coming to a conclusion over 300 Blackout vs 556 requires parsing both situations and factors. Mar 8, 2021 · The .300 Blackout (center) and the .300 HAMR (right) are both AR-15 compatible, .30-caliber cartridges, designed to offer a level of performance unobtainable with the .223 Remington (left). In ... Nov 24, 2020 · Looking for a product featured in this video? YouTube prevents us from posting links. Head over to our website to find what you're looking for.Check out our ... Jul 13, 2023 · In today's video, we will be comparing the performance of the 5.56 NATO to the 300 Blackout on mild steel. These cartridges are very similar in length but ar... Final Shots: 300 Blackout vs 458 SOCOM. The 300 AAC Blackout and 458 SOCOM are two rifle cartridges that have successfully increased the stopping power of the AR-15. The 300 Blackout offers shooter tons of versatility in bullet weight and barrel lengths. Undoubtedly one of the most popular cartridges offered in an AR-15 not named 5.56 …Nov 15, 2023 · The 300BLK round offers the same energy as 5.56mm but with a shorter barrel (while staying quieter). In addition, 300BLK rifle upper assemblies can be paired with any AR-15 lower assembly and in most cases is compatible with 5.56mm magazines. The upgrade process is easy and can be done without the need for an armorer. The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P.), also known as 7.62×35mm, is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine.The cartridge yields increased performance in shorter barrels and effective subsonic …The 300 Blackout cartridge is best fired from a suppressed, short-barreled AR-style firearm at distances shorter than 400 meters if supersonic ammunition is used, and less than 200 if subsonic. The ballistic performance paints the round as esoteric and eludes to the secretive nature of special operations. ... 300 Blackout Buyer's Guide. 300 …0/9 inch barrel 115grain 300BLK (supersonic) out actually come out 300 ft-lbs more than 556. You'll notice later in the post I say .300blk in supersonic is better than 5.56 in an SBR, but the OP specifically asked for SUBSONIC .300blk. ... In a standard 16" barrel, supersonic .300 Blackout has more muzzle energy than supersonic 55gr 5.56 and supersonic m855 …Feb 9, 2023 · This meant with the adoption of 300 Blackout, an M4 style rifle could be used with shorter barrel lengths and still be effective when compared with 5.56 rounds out of similar length barrels. Let’s compare these rounds. 300 Blackout vs 556: The Ultimate Comparison Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch …Jul 3, 2023 · The .300 BLK, on the other hand, is a larger diameter round that is often slower but hits with more ft-lbs on target. The 300 blackout is also a much better round when it comes to suppressing. Let’s talk about super and subsonic ammo. 300 blackout vs 556 Power and Range. Both 5.56 and 300 blackout have been extensively tested. What testing ... 335K views 5 months ago #midwayusa. In today's video, we will be comparing the performance of the 5.56 NATO to the 300 Blackout on mild steel. These cartridges …The 308 Winchester is a full powered rifle round that was designed in 1952. It case length of 51mm and uses a 30 caliber projectile. Light loaded rounds like a 125 spitzer round cna reach speeds of 3,100 feet per second. The 300 Blackout is derived from the 300 Whisper and received a SAAMI spec in 2011.Based on ASPCA data from 2021, the total annual cost of caring for a dog or cat for the first year was closer to $2,705 and $1,556, respectively. After that, routine yearly expense...A reliable home generator helps ensure you have stable power and comfort during blackouts that can last for hours or days. That’s why it’s important to choose the right unit for yo...Read our latest news and guides on how to earn and maximize JetBlue TrueBlue Rewards miles to travel for free. At a glance JetBlue’s TrueBlue Rewards program offers easy-to-redeem ...Truly appreciate you watching the videos!!!WTW shirts!!! - https://bit.ly/2W68GqpHeavy Metal here: https://bit.ly/30wF6wWSupport us on Patreon https://www.pa...300 BLK is a .308 projectile in a necked up 556 case, with the same cartidge overall length. This makes it compatible in most 556 platforms, bolts, even many mags, etc. 300 BLK has an option to fire subsonic, heavier bullets while still operating semi-automatically. It's much quieter than a suppressed normal 556..

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