NBS AR-15 .223/5.56 A2 Style Mil-Spec Buffer / Receiver Extension Kit

Mil-spec Rifle Length Receiver Extension / Buffer Kit. Fits standard A1, A2 and other fixed stocks. For 5.56/.223 AR-15's only.Includes: Rifle Length Receiver Extension / Buffer Tube, 12 3/4" Mil-Spec Buffer Spring and AR-15/M16 Rifle BufferTotal Weight: 11.9 oz.Weight of Buffer: 5.4 oz.Length of Buffer: 6"Length of spring 12 3/4"Note: This is not for adjustable / telescoping / collapsible stocks.