High capacity shortened 190-round M4/M16/SPR Sniper/M16 Vietnam magazine with metallic shell. Quality manufactured by DBoys. Compatible with Echo 1, JG, ICS, DBoys, G&G, AGM, Classic Army and Tokyo Marui M4/M16/M16 SPR/M16 Vietnam AEGs. Excellent quality and finish. Features: - 190-round capacity, easy wind-up - High precision feeding - Does not require the use of a speedloader (BBs pour right into the reservoir)