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PX4 barrel is binding and holding slide out of battery… I think
I have a PX4 purchased used. Was is very good condition and no visible issues. Put around 700 rounds down range since obtaining it.
The last trip to the range after every round the slide would stick to the rear past even where the slide lock would engage. Had to tap it to get it back in battery, after about 5 rounds it was clear something was wrong.
I was also able to duplicate that condition by hand with no magazine and no ammo in chamber.
I removed the barrel and placed the recoil spring in the frame and put the slide on. Cycles fine to rear and does not show any signs of binding. Once the barrel is installed is when this condition happens consistently.
I have to assume something worked it way in there and caused this issue? Not sure what to do right now except take it out of my EDC until figured out.
Some images taken last night.. does anyone see what might confirm excessive wear? I honestly haven’t closely inspected the barrel previously that I can say yes or no.
The image of the barrel attach#98183 seems to show possible gouge in the groove?
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Attachment 98183
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If you love it... put a ring on it!
Quote:
Originally Posted by
JackNeat
I have a PX4 purchased used. Was is very good condition and no visible issues. Put around 700 rounds down range since obtaining it.
The last trip to the range after every round the slide would stick to the rear past even where the slide lock would engage. Had to tap it to get it back in battery, after about 5 rounds it was clear something was wrong.
I was also able to duplicate that condition by hand with no magazine and no ammo in chamber.
I removed the barrel and placed the recoil spring in the frame and put the slide on. Cycles fine to rear and does not show any signs of binding. Once the barrel is installed is when this condition happens consistently.
I have to assume something worked it way in there and caused this issue? Not sure what to do right now except take it out of my EDC until figured out.
Some images taken last night.. does anyone see what might confirm excessive wear? I honestly haven’t closely inspected the barrel previously that I can say yes or no.
The image of the barrel attach#98183 seems to show possible gouge in the groove?
Your cam and barrel look fine and unmarred.
Firstly, I would suggest that you always make sure to put a ring of grease around the cam lug.
Attachment 98185
For more suggestions on lubrication, check out this map:https://pistol-forum.com/showthread....ull-size/page3 post 27
The guide rod assembly cannot be put in backwards, as the guide rod is too long if the rear point (that locks it into the frame) is out of place.
So, the rotating barrel does more than rotate. There is a straight channel at the rear end of the barrel's cam track where it locks in for more pressure relieving delay, even before rotating. It should not be overlooked for lubrication. https://pistol-forum.com/showthread....-and-how/page4 post 37
It is possible that the pistol was stored with the slide back or some other thing made the rebound spring weak or old. A new guide rod assembly is possibly needed. It seems less likely, as it ran for 700 rounds. They don't poop out suddenly.
I would try wiping down all parts and putting the ring of grease and grease on the sides of the barrel's cam track first.
Was the ammo exceptionally hot?