Out of stock Quick view Phase 5 Magazine Release Tool Bullet Button MRT308 Phase 5 MSRP: Now: Now $20.00 Was: Phase 5 Magazine Release Tool MRT308 This 6061 T6 billet mag release tool is made to fit AR10/308 California-compliant magazine locking devices, AKA "bullet buttons." This tool is intended to be... MRT308 MSRP: Now: Now $20.00 Was: Out of stock Quick view