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How to fix: bbs jamming on feed ramp/chamber


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#1 BoobieM4H

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Posted 14 June 2013 - 07:31 AM

https://www.youtube....be_gdata_player

#2 BoobieM4H

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Posted 14 June 2013 - 09:27 AM

This is not the shady electrical tape fix that you folks who live in warmer weather cant use. This is a legit fix for yall.

#3 FlagBonz

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Posted 16 June 2013 - 06:08 AM

Thanks. Do you need to crimp at any specific orientation- 3oclock to 9oclock versus 12 to 6.

#4 BoobieM4H

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Posted 16 June 2013 - 06:46 AM

View PostFlagBonz, on 16 June 2013 - 06:08 AM, said:

Thanks. Do you need to crimp at any specific orientation- 3oclock to 9oclock versus 12 to 6.
I like to crimp at the 3 and 9 o'clock positions. But it doesn't really matter.

( o Y o )



#5 netpoc

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Posted 16 June 2013 - 09:06 PM

Here's another option to securing your barrel to the hop up for those of you who do not have a vise of some kind. Make a groove behind the brass collar and install either an o-ring or a c-clip to secure the barrel in place. I'm not really sure why KWA did not do this originally, I'm guessing just an oversight.Posted ImagePosted Image

#6 BoobieM4H

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Posted 16 June 2013 - 09:29 PM

View Postnetpoc, on 16 June 2013 - 09:06 PM, said:

Here's another option to securing your barrel to the hop up for those of you who do not have a vise of some kind. Make a groove behind the brass collar and install either an o-ring or a c-clip to secure the barrel in place. I'm not really sure why KWA did not do this originally, I'm guessing just an oversight.Posted ImagePosted Image
Oh I like this! :)

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#7 netpoc

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Posted 16 June 2013 - 09:36 PM

I though you might :). It seems to work pretty well.

#8 BoobieM4H

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Posted 16 June 2013 - 10:25 PM

View Postnetpoc, on 16 June 2013 - 09:36 PM, said:

I though you might :). It seems to work pretty well.
Yup..I really like it. Gonna have to try it out.. thanks

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#9 BeachEMT

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Posted 16 June 2013 - 11:19 PM

Netproc- That's a great solution. Sorry Boobie, I was thinking about doing your method as a preventitive measure, but then I saw what it required and decided hell no.

#10 BoobieM4H

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Posted 16 June 2013 - 11:29 PM

View PostBeachEMT, on 16 June 2013 - 11:19 PM, said:

Netproc- That's a great solution. Sorry Boobie, I was thinking about doing your method as a preventitive measure, but then I saw what it required and decided hell no.
Do what you like to your gun..if you want to dremel a ring into your barrel..and are skilled enough to so it..by all means do so.

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#11 BeachEMT

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Posted 16 June 2013 - 11:44 PM

View PostBoobieM4H, on 16 June 2013 - 11:29 PM, said:

Do what you like to your gun..if you want to dremel a ring into your barrel..and are skilled enough to so it..by all means do so.

I was going to use a pipe cutter. That would be my suggestion to everyone who wants to do it. I picked one up for cheap at lowes when I was making my CQB Barrel.

#12 BoobieM4H

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Posted 17 June 2013 - 06:02 AM

View PostBeachEMT, on 16 June 2013 - 11:44 PM, said:


I was going to use a pipe cutter. That would be my suggestion to everyone who wants to do it. I picked one up for cheap at lowes when I was making my CQB Barrel.
Goodluck with that pipe cutter..you'll have a jamming issue for sure after using that..

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#13 netpoc

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Posted 17 June 2013 - 06:04 AM

A pipe cutter will not leave a wide enough groove for a c-clip, let alone an o-ring, and you run the risk of accidentally cutting too deep with it and then you have a 2" barrel. A dremel with a thin metal cutting wheel is your best bet. The idea is to remove material from the outside of the barrel without deforming the inside of it. And by all means boobie, you are very welcome to it. I hope this works for everyone having jamming and double feed issues.

#14 BoobieM4H

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Posted 17 June 2013 - 10:19 AM

View Postnetpoc, on 17 June 2013 - 06:04 AM, said:

A pipe cutter will not leave a wide enough groove for a c-clip, let alone an o-ring, and you run the risk of accidentally cutting too deep with it and then you have a 2" barrel. A dremel with a thin metal cutting wheel is your best bet. The idea is to remove material from the outside of the barrel without deforming the inside of it. And by all means boobie, you are very welcome to it. I hope this works for everyone having jamming and double feed issues.
As long as there is enough room to push everything back in this fix should work well

( o Y o )



#15 philsaudio

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Posted 17 June 2013 - 10:49 AM

When I saw that groove I thought of how you can cut a pipe in a table saw. The groove being the size of the blades kerf.

Holding the barrel in a jig over where the blade goes, raise the blade, through your jig (thats right cut a slot in your jig) to kiss the barrel, then rotate the barrel to circumscribe the barrel. It would help if the barrel was pinned on one side to control where the slot will be cut. .

#16 BeachEMT

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Posted 17 June 2013 - 10:54 AM

View PostBoobieM4H, on 17 June 2013 - 06:02 AM, said:

Goodluck with that pipe cutter..you'll have a jamming issue for sure after using that..

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The barrels' ID don't noticeably deform when you run the tool on them. The materiel is push toward the sides and away. You would just need to clean up the OD of the barrel. I have been running my CQB barrel for a while with no problem (all I did after the cut was debur).

#17 BoobieM4H

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Posted 17 June 2013 - 11:01 AM

View PostBeachEMT, on 17 June 2013 - 10:54 AM, said:

The barrels' ID don't noticeably deform when you run the tool on them. The materiel is push toward the sides and away. You would just need to clean up the OD of the barrel. I have been running my CQB barrel for a while with no problem (all I did after the cut was debur).
Good luck..remember. you're not completely cutting the barrel in half..so there is no way to debur the inside of your inner barrel after you run the pipe cutter around. I highly suggest you folks don't.

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#18 netpoc

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Posted 17 June 2013 - 05:19 PM

View PostBoobieM4H, on 17 June 2013 - 11:01 AM, said:


Good luck..remember. you're not completely cutting the barrel in half..so there is no way to debur the inside of your inner barrel after you run the pipe cutter around. I highly suggest you folks don't.

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I will second that! The pressure from the pipe cutter most likely will deform the inner diameter of the barrel.

#19 netpoc

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Posted 17 June 2013 - 05:22 PM

View PostBoobieM4H, on 17 June 2013 - 10:19 AM, said:


As long as there is enough room to push everything back in this fix should work well

( o Y o )

That was my initial concern, which was quickly answered as there is tons of room behind the brass collar.

#20 General Pickle

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Posted 17 June 2013 - 06:38 PM

Oooh cool ideas! I really wish I was still at school, that way I could do this on a lathe. Perhaps using a hacksaw VERY CAREFULLY could give the groove needed?




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