I've got 2 - a 223 and a 243. Both shoot Inch groups at 150yds off a bipod with no change to the standard set up.
Bill's right regarding the recoil lug / block ... it's easy to get the whole thing back together with the recoil lug / block incorrectly seated .... I didnt even realise at the time coz I was such a noob. the gunsmith I took it to to get the suppressors fitted pointed me straight again ...
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