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Bearcat
I finally got around to buying myself a mk4 love the gun,it shoots great but holy crap it's unreliable . The first time I took it to the range it misfired the second round and several after that. So I came here and other sites looking for info and so far I have installed from Volq. a trigger kit,new firing pin,extractor ,rounded over the lips on the magazines and installed stronger springs in them. I still get failure to fire (no strike on the rim) stove piping ,failure to extract and no bolt hold open after last round. I have tried CCI , Remington , Aguila , Federal and Winchester ammo , doesn't matter. What am I missing , I driving me crazy. Thanks for any help