The Ultralight QD Endplate for AR-15/M-16 pattern rifles. The endplate is machined from billet 7075-T6 aluminum with mil-spec Type III anodized finish and a press-fit Titanium QD sling swivel cup. This combination of materials and finishes is ideal for weight reduction that doesn't sacrifice durability or performance. Compatible with both mil-spec and commercial carbine buffer tubes, requires Castle Nut for installation (not included).