Luth-AR Oversize Paddle Bolt Catch Assy Black. The large paddle facilitates positive bolt release and locking. Perfect for use in competition where high-speed manipulation counts as well as hunting law enforcement and military use when wearing gloves in tactical or cold weather situations. Specifications for Luth-AR The Paddle Oversize Bolt Catch Assy: Manufacturer: Luth-AR Gun Model: AR-15 Fabric/Material: 8620 Steel heat treated to 15N-89-91 Caliber: .223 Remington Color: Black Finish: Magnesium Phosphate Additional Features: Oval shaped paddle Weight: 0.04 lb Features of Luth-AR The Paddle Oversize Bolt Catch Assy Oval shapped paddle Bolt release allows for fast contact to engage and retract the bolt carrier High-speed manipulation Textured for a non-slip grip with good looks Package Contents: Luth-AR The Paddle Oversize Bolt Catch Assy LR-09 Bolt Catch Spring 1-ea. LR-10 Bolt Catch Buffer (Plunger) 1-ea. LR-11L The Paddle Oversize Bolt Catch 1-ea. LR-12 Bolt Catch Roll Pin 1-ea. What firearm models does the manufacturer say Luth-AR The Paddle Oversize Bolt Catch Assy is compatible with? The manufacturer says that Luth-AR The Paddle Oversize Bolt Catch Assy is compatible with AR-15Luth-AR LR-11L-A: Oversize Paddle Bolt Catch Assy Black