How difficult is it to replace the trunnions on a Beretta 682. Gun is starting to loosen up. Any opinions?
Replacing 682 Trunnions
ejg
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It's highly unlikely the joint roll pins/screws are worn, or even the bbl hooks.
If they were, you should have a gap in the breech face.
It's more likely the backside of the forend lug...located on the bbl, is worn, allowing the gun to feel sloppy while it's open.
Doug
If they were, you should have a gap in the breech face.
It's more likely the backside of the forend lug...located on the bbl, is worn, allowing the gun to feel sloppy while it's open.
Doug
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10,793 Posts
What Doug said. The barrel trunnions are VERY hard. You might take them out with a metric Allen wrench and swap sides with them. It can't hurt, but probably won't help.
As long as the ejector timing is ok, don't worry about it.
As long as the ejector timing is ok, don't worry about it.
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19,051 Posts
391 SL has it right. Beretta has designed their guns and replacement parts so that trunnions can be replaced with over-sized ones (they come in several increasing sizes). If it is this, it will need factory authorized people to have access to the parts.
GunDr may be right about the barrels being the true culprit (do you feel this with the gun closed or only when open?), but I believe the factory solution is to fit over sized trunnions and then refit the barrels to this.
Coles or Beretta are your two best choices - not sure if Etchen does this too...
David D
GunDr may be right about the barrels being the true culprit (do you feel this with the gun closed or only when open?), but I believe the factory solution is to fit over sized trunnions and then refit the barrels to this.
Coles or Beretta are your two best choices - not sure if Etchen does this too...
David D
If the bbl appears to be loose while closed...forend assy removed, the locking bolt pins may need to be replaced with oversized ones.
Replacing the trunnions and refitting the bbl is ONLY needed if the bbl has moved away from the receiver's breech face...which is very, very rare on a factory fitted bbl. As I mentioned "somewhat" in the above paragraph, the bbl could be loose to the receiver and still have a tight fitting breech face. This is because the locking bolt is not holding the bbl tight enough in the "battery" position.
With a gun feeling loose while it is open...forend assy installed, wear can be experienced on the forend/bbl lug. A properly fitted forend iron actually gets wedged between this lug and the receiver, this is what keeps the whole assy tight...no wobble.
Every break open gun will eventually wear in this area. So, what is needed, is to replace this missing material on the backside of the lug....in essence, it gets a small bead of weld added to it, then the forend iron get re-fitted.
A little CAUTION though for you "do-it-yourselfers"...welding on this lug WILL loosen any side ribs that are on the bbl if steps are not taken to protect them.
Doug
Replacing the trunnions and refitting the bbl is ONLY needed if the bbl has moved away from the receiver's breech face...which is very, very rare on a factory fitted bbl. As I mentioned "somewhat" in the above paragraph, the bbl could be loose to the receiver and still have a tight fitting breech face. This is because the locking bolt is not holding the bbl tight enough in the "battery" position.
With a gun feeling loose while it is open...forend assy installed, wear can be experienced on the forend/bbl lug. A properly fitted forend iron actually gets wedged between this lug and the receiver, this is what keeps the whole assy tight...no wobble.
Every break open gun will eventually wear in this area. So, what is needed, is to replace this missing material on the backside of the lug....in essence, it gets a small bead of weld added to it, then the forend iron get re-fitted.
A little CAUTION though for you "do-it-yourselfers"...welding on this lug WILL loosen any side ribs that are on the bbl if steps are not taken to protect them.
Doug
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