FULL-AUTO WOUNT WORK

[jamesbond]

Thanks guy's for your help..I got my extractor out and got it running...but I have some problem with my auto selector...When I switch my selector to semi it works perfectly when I switch to auto my gun runns for two bullets only the third one will be jammed or it looks like it woun't reach the chamber fully the bullets is half way to my chamber barrel,does my bolt reaches and bend my bullets..My UZI is model B IMI 9mm semi-auto but converted it to full-auto..my lower reciever works perfectly and using IMI magazines and IMI bullets..PLEASE tell what's wrong..Thanks :heavy

 

[KarlPMann]

Unfortunately there are a lot of things that can cause this sort of thing. Anything that would slow down the bolt for one. Feed lips on the mags for another (don't touch them until very last resort). Check the recoil spring for wear and weakness. Check to see if bolt can travel the receiver freely. To do that, open top cover and remove bolt assembly. Remove recoil spring from bolt. Place bolt back in receiver (also remove buffer if there is one). Remove lower assembly. Tip the receiver from front to back and see if bolt will travel freely the full length. If not, you need to find and alleviate the problem. If it does, add the lower back and put the selector in FA, see if the bolt still travels freely while holding back the trigger. If not, again, you need to get it to do so. Most likely there may be very slight tightness between the bolt and receiver somewhere. Taking very small amounts of metal off the bolt with fine sandpaper can cure that problem. Also bending the top cover very slightly so it bows upward can help. The "bow" should be very slight, only noticable to someone looking for that. With the top cover back off put a mag back in the gun (still no spring) see if the bolt travels freely. Replace top cover and try again. If the bolt hangs up even slightly on any of these steps, you need to cure the hang up before proceeding. If you do all this and the problem persists, you may need better mags. You also might need to have your feed ramp throated and polished. The angle of the feed ramp can cause problems. If you have no hang ups at all, you may want to consider having a pro look at it. I'd highly recommend an UZI expert like Vector. Yes, they may cost more, but they stand a better chance of getting it right without screwing up a several thousand dollar gun. Karl.


Edited to add: Sorry, forgot you were in the Phillipines, Vector is out most likely. Try the steps I mentioned above and post back here with results. We'll keep trying. Karl.

 

[jamesbond]

Ok! Karl I'll do that today see if it works..I'll let you know the result..Thanks a lot!! :heavy

 

[KarlPMann]

:thumbs_up No sweat. We'll figure out the problem eventually, it just might take a little more time over the internet. Many good gunsmiths around there? Karl.

 

[jamesbond]

Karl, of all the tips I got it's the throating ang polishing that works on my UZI..I went to the range and shoot 400rds and I only got one jam but I'm satisfied with the result ..Thank You!

 

[KarlPMann]

You're welcome, one jam in 400 rounds is very good IMHO. Karl.