![]() ![]() This meant that the individual soldier could carry more rounds on their person and in the gun with a similar weight to the equivalent combat load with 7.62×51 NATO. The 5.56 round was developed from the ground up to provide an effective but lighter round for infantry use. 308 or 7.62×51 NATO but exceed the terminal performance of pistol rounds. This means they do not meet the power of a full-powered rifle round like. 5.56 vs 300 Blackout Designīoth 5.56 and 300 Blackout are intermediate cartridges. However, this does not always equate to similar ballistic performance.īefore we get into that, let’s look at these rounds’ design. Since both of these rounds were designed to use the same or similar rifle type, we can expect to find them very similar in their dimensions. 300 Blackout vs 556: The Ultimate Comparison 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. ![]() However, the ballistic performance of 9mm did not compare to rifle rounds. Previously this role was filled by submachine guns like the integrally suppressed MP5SD. The round was intended to fulfill a close quarters’ role while providing better performance in both suppressed circumstances and shorter barreled rifles. This allowed for the use of an already developed and supported weapon system without the need of adopting a new firearm in addition to a new cartridge. The only difference was the caliber of the projectile which required a simple barrel swap to change between cartridges The 300 Blackout was able to use the same bolts, lowers, magazines, and uppers as 5.56 NATO. The finished designs were submitted to SAAMI and approved in early 2011, resulting in the 300 BLK or 300 Blackout as we know it today. 300 Whisper was standardized by Advanced Armament in a way that it would work with standard M4 parts and magazines. 300 Whisper fit many of these criteria, but since it was not certified by the Sportings Arms and Ammunition Manufacturer’s Institute (SAAMI) it could not be formally adopted by the US military and put into inventory.īetween 20 the concept of the. ![]() Finally, the round must also be compatible with the M-16/M4 family of weapons with few modifications.Ī 1990s era wildcat cartridge known as the. The second parameter was that the round perform equal to or better than 7.62×39 at supersonic speeds. The first parameter was that it must exceed the subsonic performance of 9mm Luger. There were three major parameters that needed to be met by the new cartridge. Additionally, there was a desire to meet or surpass the current ballistic performance of ammunition and weapon systems currently available to them. US Special Forces were interested in a new cartridge that would add to their capabilities while not complicating their supply chain. ![]() This includes their intended use, dimensions, and performance What Is 300 Blackout? To answer those questions we will have to look at and compare each of these rounds. 300 Blackout vs 5.56?Īnd what is the performance of 5.56 vs. 300 Blackout in your AR-15 is one of the easiest caliber conversions to do, but it does raise some questions. However, most of those caliber changes require a significant number of modifications to the rifle itself, making them a complex and expensive decision. Over the years the AR platform has been modified to accept a multitude of different calibers. This is especially true when dealing with AR-15 platforms. Selecting the proper caliber for your needs is necessary to get the most out of your firearm. ![]()
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