The Patriot 18-inch Rifle-Gas 5.56 NATO AR-15 Upper Build Kit from Davidson Defense is engineered for durability and reliability, making it a solid choice for any gunsmith who values performance. The kit features an 18-inch Government Profile barrel made from 4140 gun steel with a nitride finish, providing excellent corrosion resistance and longevity. The barrel has a 1:7 twist rate and is threaded with a 1/2x28 pitch, compatible with standard muzzle devices like the included AR-15 birdcage flash hider.
The upper receiver is crafted from 7075-T6 aluminum with anodized finish for heightened strength and resilience, featuring standard M4 feed ramps for optimal feeding. A free-floating handguard made from 6061-T6 aluminum adds to the kit’s versatility, while a rifle-length gas system ensures reliable cycling. This complete upper build kit delivers consistent performance and accuracy in various conditions, ideal for any firearms enthusiast.
Caliber: 5.56x45mm NATO
Barrel Length: 18-inch
Barrel Twist Rate: 1:7
Barrel Thread Pitch: 1/2x28
Barrel Profile: Government
Barrel Material: 4140 Gun Steel
Barrel Finish: Nitride
Barrel Gas System Length: Rifle
Gas Block Size: 0.750
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: Free Float
Muzzle Device: AR-15 1/2x28 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 1/2x28
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