Promag ar-10/308 cal ar type rifles lower receiver magazine well vise block helps to prevent damage or movement during repair, assembly and cleaning.Heavy duty block clamps into the magazine well of the lower receiver.Double sided design fits armalite, dpms, remington, sr-25 and many other ar type rifles.Made in usa.Type: 308 Win,7.62 NATOBlade Type: N/ABlade Length: BlackOal: AR-10Blade Material: PolymerWeight: AR-10Sheath: AR-10 Platform