Jump to content


Uspc Bbs Lodging In Feed Ramp

uspc bbs jam feeding lodging

  • Please log in to reply
9 replies to this topic

#1 o6inferno

o6inferno

    Enthusiast

  • Members
  • PipPip
  • 110 posts
  • Gender:Male
  • Location:lawrenceville, ga
  • Interests:airsoft, cars, guns
  • Country:

Posted 17 March 2012 - 07:32 PM

OK i just got a new USP compact from unit and I'm having a issue with BBS lodging in the feed ram to the hop up chamber. not only the one that i got but the other that is still on the shelf and another that a customer purchased is doing the same thing. Was wondering if any one has seen this issue and any possible easy fix to it without sending them all in. I am using king arms gas with goldenball BBS. and so is the other customer that is having the same issue. you can push a little on the rear of the slide and make it complete its cycle but I'm afraid of the loading nozzle breaking due to the added stress and it shouldn't need to be done on new pistols.

#2 niko_gpsy

niko_gpsy

    What's a Warranty?

  • Super Moderator
  • PipPipPipPip
  • 5,877 posts
  • Gender:Male
  • Location:Atlanta, GA
  • Interests:Keeping those damn squirrels from putting their filthy little paws on my peaches in my backyard. Oh, Yes. It's not just a hobby, its a passion!!
  • Country:

Posted 19 March 2012 - 06:51 PM

Is the slide sticking a bit?
Have you tried cleaning and lubing the slide yet to see if this resolves your issue?

#3 o6inferno

o6inferno

    Enthusiast

  • Members
  • PipPip
  • 110 posts
  • Gender:Male
  • Location:lawrenceville, ga
  • Interests:airsoft, cars, guns
  • Country:

Posted 20 March 2012 - 05:31 AM

Slide is perfectly smooth I did clean and relube all 3 but the bbs are actually getting lodged in The hop up and they have to be popped out with ur finged

#4 niko_gpsy

niko_gpsy

    What's a Warranty?

  • Super Moderator
  • PipPipPipPip
  • 5,877 posts
  • Gender:Male
  • Location:Atlanta, GA
  • Interests:Keeping those damn squirrels from putting their filthy little paws on my peaches in my backyard. Oh, Yes. It's not just a hobby, its a passion!!
  • Country:

Posted 20 March 2012 - 02:36 PM

Do the buckings look swollen? You may want to try disassembling the hop up unit. Something may be off with the unit.
And is the cylinder movement smooth?

#5 o6inferno

o6inferno

    Enthusiast

  • Members
  • PipPip
  • 110 posts
  • Gender:Male
  • Location:lawrenceville, ga
  • Interests:airsoft, cars, guns
  • Country:

Posted 20 March 2012 - 02:41 PM

the cylinder movement is smooth and operates normally, the bucking is fine , and i checked the hopup assy. to make sure it was together correctly. i will try and get a pic and get it uploaded asap

#6 SGT317

SGT317

    Newbie

  • Members
  • Pip
  • 1 posts
  • Country:

Posted 24 March 2012 - 08:28 AM

im having the same problem i took apart the whole bucking/hopup pulled out the bucking put the ball in and re assembled it still have the same problem, does this mean the bucking must be swollen?

#7 VictorNica

VictorNica

    Customer Service Specialist

  • KWA Staff
  • PipPip
  • 112 posts
  • Gender:Male
  • Country:

Posted 28 March 2012 - 10:57 AM

Try switching brands of bbs, preferably KSC/KWA to test. Also clean out the barrel and bucking. Remember for general maintenance on our pistols you only need a minimal amount of oil on the main seal, rails and frame. If oil is applied to any area that comes in direct contact with the bb it can cause jamming.

#8 Anachro12

Anachro12

    Newbie

  • Members
  • Pip
  • 9 posts
  • Gender:Male
  • Location:blacksburg, Va
  • Interests:Airsmithing, Computer games
  • Country:

Posted 11 May 2012 - 03:11 AM

I had the same issue, the feed ramp is too thin at the bottom and was actually taking chunks out of my BBs. TSD, Bioshot, ICS, all of them. The solution for me was to take a rod that was just slightly smaller than 6mm (I have one for installing rhops) and wrap 600 grit sandpaper around it. I sanded the two prongs on the lower part of the feed ramp very slowly, not changing their shape but just widening them a little bit. After I was done I used a dremel with a polishing bit and polished the feed ramp so that it was glass smooth. No problem feeding bbs now. :clap:

Warning...I am sure this will void your warranty.

#9 seraph

seraph

    Newbie

  • Members
  • Pip
  • 1 posts
  • Gender:Male
  • Location:Massachusetts
  • Country:

Posted 09 July 2012 - 07:20 PM

Hello this is my first post but I've been lurking and reading about the USP's for a while now before I got one.  I got a compact tactical for 65$ with 3 mags! gun seemed to work but had all the symptoms as the previous posts.  Fired a few then randomly wouldn't chamber the next round and I could visually see the bb stuck on the feed ramp.  It was so bad that i manually had to rack it for each shot for 1 entire mag! There was even small marks on the stuck bb's And the ones that fed shot spiratically with no consistency whatsoever.

I thoroughly cleaned and lubed the gun and still same problem. I looked to buy a new ramp but the pro shop showed all out and decided to try the polishing.  Success! polishing the ramp kept the bb's from getting jammed in the prongs and the gun shoots great now!  Every mag has fed perfectly no jams and now has a consistent shot pattern.

thanks Anachro12

#10 gcw360

gcw360

    Supreme Guru

  • Super Moderator
  • PipPipPipPip
  • 11,545 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Airsoft (Especially repair and customizing), Fly Fishing, Fossils (Especially Dino), Snakes, Photography
  • Country:

Posted 10 July 2012 - 07:01 PM

View Postseraph, on 09 July 2012 - 07:20 PM, said:

Hello this is my first post but I've been lurking and reading about the USP's for a while now before I got one.  I got a compact tactical for 65$ with 3 mags! gun seemed to work but had all the symptoms as the previous posts.  Fired a few then randomly wouldn't chamber the next round and I could visually see the bb stuck on the feed ramp.  It was so bad that i manually had to rack it for each shot for 1 entire mag! There was even small marks on the stuck bb's And the ones that fed shot spiratically with no consistency whatsoever.

I thoroughly cleaned and lubed the gun and still same problem. I looked to buy a new ramp but the pro shop showed all out and decided to try the polishing.  Success! polishing the ramp kept the bb's from getting jammed in the prongs and the gun shoots great now!  Every mag has fed perfectly no jams and now has a consistent shot pattern.

thanks Anachro12
Thank you for the post and welcome to the KWA Forums.  Nice fix!





Also tagged with one or more of these keywords: uspc, bbs, jam, feeding, lodging

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users