ALOSTYR two-piece MIL-STD 1913 12" handguard assembly require no special fitting! This fully machined aluminum handguard system has four MIL-STD rails and replaces the handguards on your firearm without requiring the removal of the delta ring. Armalite’s non-free float handguard is a two piece unit which means you get the best of both worlds; a solid platform for mounting lights and other accessories with no disassembly of your rifle. Just replace the handguards and you’re ready to go! Also includes 3 rail covers. Armalite’s ALOSTYR 2-Piece MIL-STD 1913 handguard assemblies work on both .223 and .308 rifles.