AceTech 6mm Tracer Biodegradable BB'S Gun Attachment so you can adjust the hpa m4 adapter FPS Range 370 400 Style:Blue/White NINJAPK68D

so you can adjust the pressure per square inch to change the velocity of the BBs coming out

Features Lightweight CNC aluminum vented slide with an injection molded polymer lower frame that provides the perfect mix of realism and rugged reliability

Weight: 7

Compatibility: M-lok And Keymod Attachment

AIP slide stop with thumb rest

AceTech 6mm Tracer Biodegradable BB'S Gun Attachment so you can adjust the hpa m4 adapter FPS Range 370 400 Style:Blue White NINJAPK68D so you can adjust the pressure per square inch to change the velocity of the BBs coming out Features Lightweight CNC aluminum vented slide with an injection molded polymer lower frame that provides the perfect mix of realism and rugged reliability