Birchwood Casey AR-15 Bench Block Gray. Soft jaw design won't scratch the receiver solvent safe - won't fade wear or crack when exposed to common gun cleaning chemicals integrated magnet holds pins and small parts. Can be clamped in bench vise for easy access to receiver for assembly cleaning or repair. Specifications for Birchwood Casey AR-15 Bench Block: Manufacturer: Birchwood Casey Gun Model: AR-15 Gun Type: Rifle Caliber: 5.56mm Fabric/Material: Polyester Color: Black Features of Birchwood Casey AR-15 Bench Block Specially designed block for the AR-15 or equivalent rifle Holds the upper receiver lower receiver bolt carrier group front sight and charging handle for easy access to dowel pins for installation or disassembly Soft jaw design won't scratch the receiver Solvent safe - won't fade wear or crack when exposed to common gun cleaning chemicals Integrated magnet holds pins and small parts Can be clamped in bench vise for easy access to receiver for assembly cleaning or repair Package Contents: Birchwood Casey AR-15 Bench Block What firearm models does the manufacturer say Birchwood Casey AR-15 Bench Block is compatible with? The manufacturer suggests that Birchwood Casey AR-15 Bench Block is compatible with AR-15Birchwood Casey ARBENCH-BLOCK: AR-15 Bench Block Gray