Videos tagged with AR Pistol Caliber

This review of a 9mm AR-15 by Mark Serbu, a recognized gun designer, delves into its functionality, historical context, and potential issues. Serbu highlights the use of Glock magazines with a magwell adapter, discusses trigger pack design, and analyzes bolt velocity and its impact on trigger slap, especially in converted full-auto variants. He also details the effectiveness of heavy buffers and stronger springs in managing rate of fire and recoil, comparing it to Uzi and MP5 submachine guns.

This video details the first shots fired from a custom 300 Blackout AR build, featuring a YHM Resonator K suppressor. The presenter compares the performance of 125-grain supersonic and 208-grain subsonic ammunition, noting differences in recoil, sound, and grouping at various distances. The build is evaluated for reliability, with minor malfunctions addressed, and the overall suppressed shooting experience is highlighted as a significant improvement.

This review of the Foxtrot Mike FM15 Gen 2 9-inch SBR highlights its unique internal recoil system and proprietary lightweight BCG. While the non-adjustable gas block version is discouraged due to overgassing and reliability issues, the adjustable gas block, especially when paired with the suppressor spring, significantly improves shootability and reduces gas blowback. The reviewer notes the system's potential for compact builds but cautions against using it for heavy-duty applications due to past quality control concerns.