Beretta xtrema II
 

My extrema seems to be loose and the stock wobbles a Lil bit. Anyone know how to tighten this up. I can still shoot it but just aggrevating.

take off the butt plate
there will be two tiny holes on either end and there is a small phillips head in there.
then, you will know what to do.

My barrel was little loose on mine, took it to gator guns in Sulphur and he shipped back to Berreta, sent me whole new barrel free of charge. Great customer service. See Richard at gator guns

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I got the kickoff seems like a task to take it off.

I got it thanks guys. I tightened the nut down inside the stock

that's it!