4 Combo Upper + Lower Vise Block + Wrench Armorer's Tool Kit for .223/556

223 556 Lower Receiver Vise BlockAllows safe mounting of the lower receiver into a visePerfect for cleaning, service, or weapon assemblyFits into magazine housing from either the top or bottomMagazine catch securely locks the receiver to the blockWill not distort or damage the receiverSolvent resistant polymer construction223 556 Upper Receiver Vise BlockAllows safe clamping of upper receiver into a visePerfect for repair, service, or weapon assemblyWill not crush, distort, or mar the receiverSolvent resistant polymer construction223 556 Stock Combo WrenchRemoval and installation 556/223 barrelsInstall and disassemble free float tubes, barrel nutReceiver tube stock nut wrench old style 1 pointtube stock castle nut wrench new style 3 pointMade of 4140 powder coated steelMini Castle Nut WrenchRemoving and installing a castle nutMatte Black Finish