Ar10 Bolt Action Upper
Webfeb 28, 2024 ·. 224″ barrels feature the 3r groove geometry, while the 6. 5mm and 30 calibers are 5r. Our complete bolt action upper receivers are designed to work with nearly any standard ar. Upgrade your rifle with complete assemblies, stripped upper receivers, and more! Guarantee 1 moa or better 3 shot group at 100 yards with match grade. The upr10 brings the accuracy of a bolt action rifle to the familiar ar.