Home / Accessory-Parts / Tapco TAPCO CASTLE NUT View cart “ProMag AR-15/M16 MAGWELL VICE BLOCK” has been added to your cart. Tapco TAPCO CASTLE NUT$999 Out of stock SKU: TAP22060 Category: Accessory-Parts Product ID: 129978 Description Description For AR Platform Related products Wilson Combat GRIP MOD WCP320 CRRY TAN SFTY $6995 Q TAPER ADAPTER 1/2X28 $2500 ProMag AR-15/M16 MAGWELL VICE BLOCK $1599 Seekins Precision LO PROFILE ADJ GAS BLOCK .750 $6900