u stated the gun is working fine, so wy mess with it. possably this copuld be happening though. take the RSA out of the gun and now reverse tha toutter spring and see if it slide sup and down on that outter recoil tube. It should run smoothly up and down. If ot then I think tha toutter open tip is inward to far and grabbingon that outter tube somewhat. take a pair of pliers and just open up that outter open tip and test againonce it goes up and down smoothly, then lube the outter tube and shoot it like u stole it.
If that does not cure it, call kahr and just ask for another RSa and state ur reasoning. no need to send it back esxpecialy if it is working OK I doubt if kahr will pay to have the gun sent back when it is working OK
. My PM9 has over 32,000+ rounds through it, and runs much better than an illegal trying to get across our border
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