M4 Vise Block Armorer Block for assembly and disassembly of an M4 carbine buffer tube. This block will work with commercial or mil-spec tube.
Design By B. Fenton Engineering and Manufactured by DZ MFG. Co. in Des Moines IA, This is one of the best and handiest tool in the shop. Use for any M4 Lower work, A must for M4 buffer tube assembly, This block will keep the tube from rotating as you tighten the lock ring. It will give you a perfect alignment without flexing the lower receiver.