This kit includes: ATLVB: AR Lower Receiver Vise Blocka Allows safe mounting of the lower receiver into a visea Perfect for cleaning, service, or weapon assemblya Fits into magazine housing from either the top or bottoma Magazine catch securely locks the receiver to the blocka Will not distort or damage the receivera Solvent resistant polymer construction ATUVB: AR Upper Receiver Vise Blocka Allows safe clamping of upper receiver into a visea Perfect for repair, service, or weapon assemblya Will not crush, distort, or mar the receivera Solvent resistant polymer construction PJTW3: AR-15 / M4 Stock Combo WrenchA Removal and installation AR-15/M16 barrelsA Install and disassemble free float tubes, barrel nutA Receiver tube stock nut wrench old style 1 pointA Car/M4 tube stock castle nut wrench new style 3 pointA A1/A2 flash hider slot/receiver extensionsA A 1/2" square opening for torque barA Flat head tip screw driver for A2 butt stockA Made of 4140 powder coated steel PJA12: A1 & A2 Front Sight Toola Compatible with AR-15/M16a All steel construction