Discount Mil-Spec Buffer / Receiver Extension Kit Mil-Spec Carbine Buffer Tube / Receiver Extension Carbine Buffer Spring Castle Nut/Receiver Nut Mil-Spec Receiver End Plate Carbine Recoil BufferTrinity Force Omega Stock - SandThe Trinity Force Omega mil-spec stock kit is an upgrade over a standard USGI kit. It has a more aggressive design and includes a Quick Disconnect mount for accessories.Length (in)7.Receiver Extension TypeMil-SpecWeight (oz)22.Length of Pull Range (in)3.Length of Pull Collapsed (in)12.Length of Pull Extended (in)15.MaterialAircraft Grade Aluminum, High Strength Steel, High-Density Polymer/RubberColorSand