Birchwood Casey Bench Block Features The Birchwood Casey Bench Block is purpose built to hold AR-15 components steady during installation or disassembly giving the user easy access to dowel pins and other small fasteners that are otherwise difficult to work with freehand. Its soft jaw design cradles the upper receiver lower receiver bolt carrier group front sight and charging handle without marring the finish a critical feature for owners who care about keeping their rifle s exterior scratch free. The block s polyester construction is solvent safe meaning it will not fade wear or crack when exposed to the solvents and cleaning chemicals commonly used during maintenance. This durability lets the block remain a permanent fixture of the cleaning and maintenance bench rather than a disposable tool. An integrated magnet built into the block holds pins and other small hardware in place while the shooter works preventing the frustration of searching the floor for a dropped detent pin or spring. The block can be clamped into a bench vise giving a stable secure platform for assembly cleaning or repair work on the rifle. Designed around the 5.56 NATO chambered AR-15 platform the block fits the dimensions of that receiver set precisely. For AR-15 owners and armorers who want a reliable way to service their rifle without risking damage to its finish the Birchwood Casey Bench Block is an essential bench tool. Birchwood Casey Bench Block Specifications Manufacturer: Birchwood Casey Model: Bench Block Compatible Hosts: AR-15 Color: Gray Material: Polyester Purpose: Holder for Installation or Disassembly Features: Solvent Safe Available At: GrabAGun