CM-C91 FOR AIRSOFT USE ONLY. WILL NOT FUNCTION WITH REAL GUN. CAN NOT BE MODFIED TO FUNCTION WITH REAL GUN. MORE AMMO. Carry more ammo to the fight with an extra Airsoft magazine. Don't lose out on a crucial win by running out of ammunition! BATTLE TESTED. Magazine is constructed and manufactured using high quality compounds to ensure operation even during the most difficult of conditions. ALWAYS READY. Simply fit into the magazine well and ensure proper placement. Secures and fastens through many battles to come as you play with ease. BB EFFICIENT. Place your favorite grade of 6mm BB's whether standard match grade or biodegradable and pick off your opponents one by one to claim victory.