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I don't think this is right..

bucking

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#1 binary

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Posted 10 February 2013 - 11:19 AM

So I finally got my replacement bolt catch paddle thing, pre drilled and installed it all is working so I finally get to run about 8 mags worth through my gun.  I take it apart to clean it and I noticed that my bucking is messed up.....I read in here about the flash hider, but I don't think that is it.  The aftermarket hider I have on is from my other gun and didn't go on tight, I hand spun it on, and it is larger than the outer barrell...so no idea how that would effect the inner barrell.  Here's some pictures.  Any chance that someone could tell me what may have happened or what I did wrong???

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Thanks!

#2 akiraspeedstar

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Posted 10 February 2013 - 11:31 AM

Any chance you could get a larger image? I can't really see anything at all.

#3 binary

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Posted 10 February 2013 - 11:42 AM

I resized the images down to 480x640 for the forums, below are the links to the original full size images (in the same order as above)

http://www.binarymet...ages/image1.JPG
http://www.binarymet...ages/image2.JPG
http://www.binarymet...ages/image3.JPG
http://www.binarymet...ages/image4.JPG
http://www.binarymet...ages/image5.JPG
http://www.binarymet...ages/image6.JPG
http://www.binarymet...ages/image7.JPG

#4 snoopy

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Posted 10 February 2013 - 11:56 AM

Looks like you're chopping bbs too....

#5 binary

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Posted 10 February 2013 - 11:57 AM

Yeah thats what caused me to take a closer look, the bb shavings, I'm using KWA Perfect .25's, what would cause BB chopping?

#6 snoopy

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Posted 10 February 2013 - 11:58 AM

Does your gun jam/double feed at all?

#7 binary

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Posted 10 February 2013 - 12:03 PM

Nope, I've only ran 8 mags through it and it shot perfectly fine, no jams, bb's came out every time, only put about 28 bb's in each mag so not over stuffed

#8 snoopy

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Posted 10 February 2013 - 12:05 PM

Have you replaced the main piston o-ring?

#9 binary

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Posted 10 February 2013 - 12:10 PM

No, only thing I have done to the gun is replace the stock bolt catch with one that was pre drilled and put the RIS rails from my Classic Army and slid on here, no mod required to the gun, and the flash hider you see in the pictures.

#10 akiraspeedstar

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Posted 10 February 2013 - 12:10 PM

Could be a feed ramp issue, when the BBs are pushed up the ramp they're scraping against it and shaving some off.

Polishing the feed ramp could help with this.

#11 binary

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Posted 10 February 2013 - 12:14 PM

It looks like there is something wrong with the feed ramp, I can't remember what it is supposed to look like though, could one you look at yours then look at the pic and compare?  (If you have the time that is)

Something is off....if pull the charging handle, the silver outer bolt slides back, the black inner bolt doesn't release from the bucking until the silver bolt is almost completely receeded...I don't remember that being that way before

Edited by binary, 10 February 2013 - 12:15 PM.


#12 binary

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Posted 10 February 2013 - 12:19 PM

Yeah it looks like the bottom of the black inner bolt (maybe it's called the bb feeder, the squarish section on the bottom) actually went through the ramp

#13 snoopy

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Posted 10 February 2013 - 12:21 PM

That sounds normal. I just ran about 250 rounds through mine..and it looks fine. I did change my loading nozzle config though.

Replaced the o-ring and I went from constant jams to no jams at all...

#14 binary

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Posted 10 February 2013 - 12:22 PM

Well thanks for all the information guys, I've got some better tools coming in the mail (a proper set of punches) so I can dissassemble it right and see what is up....I'll post information when I get it.  

Thanks again!

#15 General Pickle

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Posted 22 February 2013 - 12:46 AM

Necro post, but I would try using Bioval BB's instead and see if the issue continues. Biovals are arguably the best BB's you can buy, and I've never seen them chip or shave. The feeding ramp does sound like the issue, maybe a polish job would be best. Is the bucking actually damaged in any way?

#16 binary

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Posted 23 February 2013 - 07:18 AM

I'm taking it apart this weekend, I finally got my tools in to take things apart the right way instead of backwoods way.  I'm going to take a closer look at the bucking and see.

#17 BoobieM4H

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Posted 23 February 2013 - 10:27 PM

View Postbinary, on 23 February 2013 - 07:18 AM, said:

I'm taking it apart this weekend, I finally got my tools in to take things apart the right way instead of backwoods way.  I'm going to take a closer look at the bucking and see.
Im glad you are doing things right and that you bought and are going to use the proper tools..good luck.

( o Y o )



#18 General Pickle

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Posted 23 February 2013 - 11:17 PM

View PostBoobieM4H, on 23 February 2013 - 10:27 PM, said:

Im glad you are doing things right and that you bought and are going to use the proper tools..good luck.

( o Y o )
Having the right tools makes the difference between a fixed gun and a pile of broken parts, in most cases anyway.

#19 binary

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Posted 24 February 2013 - 08:15 PM

Yeah let me tell ya, having the right tools made this SOOOO much easier!!  So I took it all apart and the bucking looks fine, the debris from the bb shavings made it look malformed, I gently cleaned those out.  I also removed the excess lube as I think I may have over lubed the bolt, cleaned everything out and put a very very very light coat of 30w on.

I inspected my current package of KWA Perfect .25's and noticed that some of the BB's where a different shade of white, so I think a teammate may have dumped some 'other' brand BB's into my bag.  I bought a new bottle of Elite .25's at my local field and put 2 mags through full auto no stopping and there was no chipping going on.  

So that is a relief, also took apart all the mags and cleaned the valves oiled the o rings and my mag leaks are fixed as well.  Cut a few coils off my rocket valve spring to lower it to CQB FPS.

With all your guys help I think I'm getting the hang of this.

#20 -wigs-

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Posted 25 February 2013 - 05:45 PM

Ksc/ kwa .25s are off white, they almost look like tracers bbs





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