These are the same “Guaranteed to Feed” barrels used in our AR45 Blowback Uppers. Made in our shop from rifled 4140 CM steel blanks, they feature our proprietary parabolic arc feed cone and corrosion resistant black nitride finish. Tested to run on Wolfpack Armory, New Frontier Armory, Angstadt, Black Creek Precision, and Quartercircle 10 large frame Glock magazine lower receivers. Twist is 1/16, Muzzle thread 5/8 x 24
7/10/22 Have a small shipment of 45 blanks and will start running them this coming week….more coming so a lot of these will go to complete uppers and conversions.