Knight’s Armament KS-6 6mm ARC Carbine

[jonny rotton]

i just put together two uppers in 6arc. only a few rounds thru them so far. my impressions are still out to lunch. soon i will shoot them side by side with equal grendels. but they do seem to extend the range some according to the ballistic charts.
with factory 105's 16" was 2515 fps and the 12.5" was 2402 at 3,000'