The Boyds Smooth Pistol Grip is 4.25" long and will fit all carbine, mid-length, and rifle length AR-15's. All finished parts have been CNC inlet to Boyd's House Action. Variations may exist from firearm to firearm, minor fitting may be required to get that perfect fit to your firearm.NoteVariations may exist from firearm to firearm, minor fitting may be required to get that perfect fit to your firearm. Natural cosmetic imperfections such as minor knots, burls, heartwood, mineral lines or minor cosmetic fill work are normal and are not considered defective.