Guntec Usa Ar-15 Extended Ergonomic Bolt Catch Rainbow Pvd Ext-Catch-Rpvd. This bolt catch is designed with extra length for better grip so shooters can load the mag properly every time. The extra length makes it easier to load a mag and it also adds extra weight for a more confident feel. This bolt catch is machined from steel for extra strength and durability. This bolt catch can be used with standard bolt handles but will require slight frame modification for installation. Specifications for Guntec USA AR-15 Extended Ergonomic Bolt Catch: Manufacturer: Guntec USA Gun Model: AR-15 Fabric/Material: T6 Aluminum Caliber: .223 Remington Size: 2 X 1 in Length: 4.25 in Hand: Right Condition: New Features of Guntec USA AR-15 Extended Ergonomic Bolt Catch Weight: 0.3 oz Ergonomic Paddle Design Non Slip Grooves Lightweight Package Contents: Guntec USA AR-15 Extended Ergonomic Bolt Catch What firearm models does the manufacturer say Guntec USA AR-15 Extended Ergonomic Bolt Catch is compatible with? The manufacturer suggests that Guntec USA AR-15 Extended Ergonomic Bolt Catch is compatible with AR-15Guntec USA EXT-CATCH-RPVD: AR-15 EXTENDED ERGONOMIC BOLT CATCH (RAINBOW PVD FINISH) RAINBOW PVD