The Proof Research Steel Drop In Barrel For Rifle Gas System AR-15 Compatible Firearms 223 Wylde 20" 1:8 Twist 1/2-28 is built for shooters who demand consistent precision from their AR platform. This traditional steel barrel uses Proof’s Caliber Matched Gas System (CAMGAS), which tunes the rifle-length gas system to the 20 inch barrel and 223 Wylde chamber for smoother cycling, softer recoil impulse, and reliable extraction over long strings of fire.

With its 20 inch length, 1:8 twist rate, and 1/2x28 threaded muzzle, this barrel is well suited for accurate range work, training, and competition-focused AR builds where reliability and repeatable accuracy matter. The 223 Wylde chamber allows safe use of both .223 Remington and 5.56 NATO ammunition, giving you flexibility in ammo selection while maintaining tight tolerances. It is an excellent upgrade for a precision-oriented AR-15 build that leverages Proof Research’s focus on performance and innovation.

Key Features:

• Manufacturer: Proof Research
• Model: Steel Drop In Barrel For Rifle Gas System AR-15 Compatible Firearms 223 Wylde 20" 1:8 Twist 1/2-28
• Caliber: 223 Wylde
• Barrel Length: 20"
• Barrel Twist Rate: 1:8
• Gas System Length: Rifle
• Muzzle Thread: 1/2x28