This stock replicates the factory stock but is construction out of highly durable and weatherproof polymer and features a 5-position collapsible buttstock. The glass filled fiberglass will not warp or crack and is impervious to moisture. All Choate stocks carry a lifetime warranty. This stock fits the M1 Carbine. NotesLength of Pull ranges from 12" to 16" with approximately 3/4" between each position of the stock. Will only fit Military version of the M1,will not fit the universal model M1.