For those builders who already have barrel parts, we offer this M4 Profile Crowned Barrel Sub-Assembly with MIL-STD-1913 Railed Gas Block. The highly accurate 4150 Chrome Moly Vanadium steel barrel has a Melonite QPQ finish inside and out to protect against rust and corrosion and rifled 1 x 9″ Right Hand twist. The muzzle is finished with a plain crown to comply with legal restrictions in States where threaded muzzles and flash hiders are prohibited. The Assembly includes Barrel, Barrel Extension with M4 Feed Ramps, Barrel Nut, Front Handguard Cap, MIL-STD-1913 Railed Gas Block with Sling Swivel. All top quality Windham Weaponry parts – made in the USA.
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