Battle Arms Development Pistol Length Lightweight Stock Combo / Qd End Plate Black. Precision CNC from billet 6061 Aircraft Grade Aluminum MilSpec Type III Class 2 Hard Anodized Black Unique Lightweight and Functional Dimpled Pattern Design MilSpec Carbine Buffer and Buffer Spring Compatible Perfect for the PISTOL AR Build. NOT A STOCK Compatible with all "Standard" AR-15 Lower Receivers (no need for captive rear takedown pin detent spring) Lightweight design eliminated the need for Castle Nut Length Past Lower Receiver = 6 5/8in made in specialized factories (1) QD END PLATE (BAD-QDEP-B) SABERTUBE Receiver Extension/Buffer Tube End Plate Model Precision CNC from billet 7075T6 Aircraft Grade Aluminum MilSpec Type III Class 2 Hard Anodized Black Built-in QD Sling Attachment Limited 30 deg Rotation QD made in specialized factories 3.95 oz Total Weight (Buffer Tube & End Plate) Note: Buffer Spring Sling Sling Swivel and Castle Nut are not included. Package Contents: Battle Arms Development Pistol Length Lightweight Stock Combo / Qd End Plate Battle Arms Development SABERTUBE-QD-P-B-KIT: Pistol Length Lightweight Stock Combo / Qd End Plate Black