Take the blowback unit out and file the base of the legs at the point where it starts to get tight against the mid frame rails. You are talking about the slide getting tight as it recoils right?
Also there's no fix for your barrel situation except to buy a shooters design outer barrel.
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The ultimate measure of a man is not where he stands
in moments of comfort and convenience, but where he
stands at times of challenge and controversy.
- Martin Luther King, Jr.
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