The Luth-AR Gunsmith AR 15 Parts Kit is the perfect solution for DIY enthusiasts and professional gun builders alike. The kit includes all the parts necessary for assembling customizing and maintaining your AR15. With high-quality durable components this kit is ideal for both beginners and experts. The compact design makes it easy to transport and store while the comprehensive range of parts ensures you can handle any job. Includes: Gun Mat (1) Buffer Retainer (10) Buffer Retainer Spring (10) Bolt Catch Spring (5) Bolt Catch Buffer (5) Bolt Catch Roll Pin (5) Detent Spring (20) Takedown Detent (20) Pin Front Pivot (5) Disconnector AR15 (5) Trigger Spring (5) Pistol Grip Screw (3) Pistol Grip Screw Washer (3) Selector/Ejector Spring (10) Detent (Selector) (10) Hammer/Trigger Pin (10) Pin Rear Takedown (5) Disconnector Spring (5) Hammer Spring (5) Gas Tube Roll Pin (10) .223/5.56 Crush Washer (5) Ejection Hinge Pin Snap Ring (10) Ejection Port Cover Pin (5) Ejection Port Cover Spring (5) Roll Pin Charging Handle (5) Charging Handle Latch Spring (5) Charging Handle Latch (5) Bolt Gas Rings (30 Pack) (2) Extractor Pin (5) Ejector Roll Pin (5) Ejector (5) Extractor AR15 (5) Extractor Spring Assy w/Insert (10) Extractor O’Ring AR15 (10) Bolt Carrier Gas Key Screw (10) Firing Pin AR15 (5) Firing Pin Retaining Pin (5) Cam Pin (3) Delrin Punch (1)