Somewhat relevant:
This was my MK18 MCMR with Sparc Solar shooting 55gr AE ball ammo through KAC QDC suppressor to test zero shift at 50 yds. Shot from prone on a bipod and rear bag. Group one in blue, suppressed. Group two in red, unsuppressed. Group three unmarked, suppressed. Original zero was unsuppressed.
Despite seeing many Internet claims of it, I’ve never been able to get regular 55gr bulk stuff to shoot better than 2 MOA or so and I chose not to use my magnifier for this since the gun wasn’t zero’d with it. I don’t have a measurement frame of reference to run Ballistic-X at the moment but IIRC, that was about 1 MOA shift at most with some beer math on figuring out the center of those gross groups.
While I need to tighten some variables and shoot at 100, I’m very pleased with an apparent minimal AND consistent shift. That was a big part of why I bought KAC.
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