The CPD LAR-15 Pistol Magazine is a 10 round magazine and works with Smith & Wesson M&P 15 Sport II .223 Rem. Semi-Automatic Tactical Rifle, Norinco Type 97-NS Semi-Automatic Flat Top Rifle, Colt Expanse0M4 Semi-Automatic Rifle, Norinco Type 97 NS Semi-Automatic Rifle, Tavor Tactical Semi-Automatic Rifle