Uzi FTF/FTE

[rrrrrrkevin]

I have been lurking here a while and snooping around the forum and have found alot of useful stuff... I hate for this to be my first post, but I guess this is what it took to finally make me sign up.

I just bought a brand new Vector Uzi Carbine and fired about a mag through it with no problems at the shop. So on the way home I take it to a friends house and shoot it up and it immediately starts jamming, at first its getting light strikes and firing about half the time so I call the dealer and head over his way to resolve the problem. On the way to the shop my friend notices that the barrel nut was able to click one more time. I thought this might have been the cause but I go back and he has a look over it and finds nothing wrong so I leave assuming that the barrel nut was it. This was over a week ago, and today I go to a local indoor range to blast some and now it starts jamming again. This time it is jamming in a different way, it shoot about 8 rounds fine and then jams and when I start firing again it fails to feed, fails to eject and everything else you can think of. I tapped and racked it and this was doing nothing so I inspected the chamber and tilted it to the side and pulled the bolt back and rattled it and sometimes 3 rounds would fall out. I tinkered with it today a bit and now it wont even chamber a round. I will post pictures to demonstrate but the round is not sliding all the way up into the barrel and when I get the bolt to actually go forward it completely passes over the 9mm cartridge.

Now here is an important part of info, when I fired it at his shop I was using his 32 round mag and it fired just fine, and I would normally say this is obviously the mag but I have had such a wide range of problems with this that I am not entirely sure that is the problem. I have some mags on order and will test fire it with them before I go back but I just wanted to post pics and ask for advice here because I get very little range time and I have to haul guns and pay money every time I shoot so I want every bit of advice before I jump to conclusions.

 

[rrrrrrkevin]

Here are some closer shots of where the bolt/cartridge ended up when I tried to cock it and feed a round. (the mags were loaded with just a handfull of rounds)

 

[BWE Firearms]

What ammo are you using?

 

[rrrrrrkevin]

Remington UMC bulk 115 Gr MC. I tried cycling some different ammo and it does seem to feed a bit different.

 

[arch stanton]

The Remington is too weak of a load for starters.

 

[9mmsubgun-m11]

Try some WWB and see what happens.

 

[abundigas]

I have also had good luck, solving FTF troubles on some of my extra Vector Barrells by polishing the lip inside the barrel, there seemed to be a much sharper edge on it than on my IMI barrels, and once I hit them with a bit of Valve Grinding paste the FTF problem was solved.

 

[hlfahnestock]

The FTF problems on my Vector were a combination of switching to a hotter ammo (WWB) and replacing the grip pin which was too small (8mm vs. 9mm).

 

[rrrrrrkevin]

Well, I got an update..

I took a selection of different ammo to the range with me and the Remington UMC bulk ammo was the only one that did not fire. I lined a few of the cartridges up next to eachother and one thing that stuck out was that every one of them was the same height except the Remington UMC ammo, its OAL is a bit shorter than the rest... This would explain why I was able to load a mag with 5 UMC and 5 of any other brand and the first five I could cycle by hand easily and once it hit the bottom of the mag where the Remington ammo was at it would gum up and not cycle a single round. I tried this at the range too actually firing them off and got the same results.

Conclusion: Remington UMC ammo is a little bit short (OAL) and doesnt allow it to feed correctly in my Vector Uzi.

I was able to blast a ton of rounds through it without a hiccup when I used the proper ammo. Very happy about that!

 

[Goat]

Don't use UMC in a Uzi.

 

[bravo5two]

Well, I got an update..

I took a selection of different ammo to the range with me and the Remington UMC bulk ammo was the only one that did not fire. I lined a few of the cartridges up next to eachother and one thing that stuck out was that every one of them was the same height except the Remington UMC ammo, its OAL is a bit shorter than the rest... This would explain why I was able to load a mag with 5 UMC and 5 of any other brand and the first five I could cycle by hand easily and once it hit the bottom of the mag where the Remington ammo was at it would gum up and not cycle a single round. I tried this at the range too actually firing them off and got the same results.

Conclusion: Remington UMC ammo is a little bit short (OAL) and doesnt allow it to feed correctly in my Vector Uzi.

I was able to blast a ton of rounds through it without a hiccup when I used the proper ammo. Very happy about that!

Thanks for the update! I had exact same problem with my new Vector using PMC ammo so based on your findings, I loaded up 100 rds of relatively hot 9mm with W231 powder and maximum OAL of 1.16, the carbine now runs as it supposed to.

 

[ZMan941]

Thanks for the update! I had exact same problem with my new Vector using PMC ammo...

Could that be a Vector thing?
My IMI Carbine fires PMC 115gr just fine.

 

[wonderdog451]

My carbine built on an IMI receiver feeds and fires any ammunition I put in the magazine including Remington. So it must be an issue with Vector made weapons.

 

[rrrrrrkevin]

I believe it is a Vector thing and I think it more specifically has to do with the carbine barrel. My FFL made a dealer sample FA Uzi with an SMG barrel (he said it was a Vector gun) and he let me fire a few mags of my UMC and it fired perfectly fine. I loaded the same ammo from the same box with the short OAL and fired it a halfhour later through mine and had problems. I will keep the crap ammo in the back of my safe for when I SBR and swap barrels just for my own curiosity.