According to Prime Mechanics Airsoft this BCM Air MCMR 11.5 AEG Build With Helical Gears sounds like an HPA airsoft rifle. This build is equipped with an Aimpoint T2 Hollywarrior, Surefire M600, and Surefire SOCOM RC2 suppressor (Dytac). Other parts are a Gate Titan II Bluetooth, Begadi Mamba motor 28 tpa + Lonex Helical pinion, SHS 12:1 DSG, Lonex Helical (spiral) bevel gear, and MagicPad️. It has a power of 1.1J with 0.28g.

Prime Mechanics Airsoft in France show their DSG build. This is a custom-built airsoft gun based on the Geissele MK16 urgi 10.5 CQBR, a compact rifle designed for close quarters combat. It features an EXPS3 Hollywarrior holographic sight, a Surefire M600 flashlight, and a Surefire SOCOM RC2 suppressor (Dytac) for stealth and accuracy.

Prime Mechanics Airsoft show the DMR they build using brushless motor for a quiet and fast DMR AEG. Used in this build are the Daniel Defense MFR 13.5, Vortex Razor HD Hollywarrior, Surefire Socom suppressor Dytac, Gate Titan I, 12:1 SSG 10 teeth, Warhead brushless, and MagicPad. Energy output is 1.5J with 0.32g.