XTS AR-15 Lower Part Kit No Fire Control Black. Specifications for XTS AR-15 Lower Part Kit: Manufacturer: XTS Color: Black Fabric/Material: Polymer Caliber: .300 AAC Blackout 7.62x39mm .223 Remington Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Weight: 0.15 lb Package Contents: XTS AR-15 Lower Part Kit Magazine Catch Assembly Takedown and Pivot Pins Bolt Catch Safety Selector Polymer Trigger Guard Selector Mag Catch Bolt Catch Takedown Pivot Pin Buffer Retainer Springs Bolt Catch Roll Pin Buffer Retainer Pin Bolt Catch Plunger Takedown and Pivot Detent Pins Trigger Guard Roll Pin AND Set Screw Safety Selector Detent Pin XTS LPK-NFC: AR-15 Lower Part Kit No Fire Control Black