Videos tagged with Bolt Velocity

Mark Serbu, a firearm designer with extensive experience, reviews a 9mm AR-15 upper. He details the use of Glock magazines with a magwell adapter and analyzes the impact of bolt velocity on trigger slap, particularly in full-auto configurations. Serbu demonstrates how a heavy buffer and stouter spring can significantly reduce the rate of fire and improve handling, comparing it to factory Colt designs and noting the jarring bolt impact even in semi-auto.

This video from SHOT Show 2026 introduces the Strategic Sciences MFMD, a 3D-printed Inconel 718 muzzle device that functions as a suppressor, flash hider, and brake. It offers significant recoil and flash reduction, with options for various calibers and extensions. The device is NFA serialized, with the muzzle device itself being the regulated component.

This video provides an in-depth review and lethality test of the Ballista BAT Reverse, the world's smallest compound crossbow. The host, demonstrating high-level expertise in archery and ballistics, compares it to larger models and tests its penetration power on ballistic gel, including a simulated skull. The review highlights the crossbow's compact design, technical specifications, and practical effectiveness for its size.

This video from Brownells Gun Techs features Caleb and Steve addressing a common misconception among DIY AR-15 builders. They argue that simply because a self-built AR-15 functions, it doesn't mean it's assembled correctly. The video highlights potential errors like gas system misalignment, over-gassing, and using the wrong buffer weight, which can lead to malfunctions as fouling accumulates or when switching ammunition. The core message is that there's a significant difference between a rifle that merely operates and one that performs optimally, emphasizing the importance of proper assembly or seeking professional help.

This video debunks the myth that firearm suppressors increase felt recoil. The Brownells Gun Techs demonstrate that the gas baffles within a suppressor act like a muzzle brake, and the added weight of the suppressor helps to reduce felt recoil. While gas-operated firearms like the AR-15 might experience increased bolt velocity due to extra gas pressure, this can be managed with adjustable gas blocks and buffer changes. Ultimately, the recoil reduction provided by the suppressor outweighs any increased kick from higher bolt velocity, confirming that suppressors do not increase felt recoil.

This video debunks the myth that over-lubrication is harmless for an AR-15. Experts Steve and Caleb explain how excess oil can attract debris, increase bolt velocity leading to excess head thrust, and cause carbon buildup behind gas rings. While under-lubrication is worse, over-lubrication can cause specific mechanical failures, especially in cold weather for bolt-action firing pins.

This review details the rare, factory-produced MAS 49-56 chambered in 7.62mm NATO, contrasting it with commercial conversions. It highlights the historical context of NATO standardization and the specific design modifications made to the rifle, such as a specialized pistol grip and cheek rest. The analysis reveals that despite modifications, the rifle project was ultimately scrapped due to mechanical failures caused by excessive bolt velocity from 7.62 NATO ammunition.