My 11.5" Noveske upper build-in-progress will be running with the A5 system: RE10/A5 receiver extension, Springco Green spring, and A5H2 buffer. From my research I anticipate it should run without issue.
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Finally got my other stripped Noveske GenII lower together with the VLTOR A5 recoil kit installed and I gotta say DAYUUUM! This thing shoots smooth and flat as all hell in-conjunction with the BattleComp 2.0
Ran a bunch of drills, but during the 5yd string of the VTAC 1/2 & 1/2 drill (10rds in 2.5sec from 5yds) I couldn't believe how flat my gun was shooting. Didnt move at all.
Very happy with the A5 and plan to swap another A5 onto my other lower on my 14.5" gun as well.