10-23-2008, 19:32
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#16
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Guerrilla Chief
Join Date: Feb 2008
Location: VA
Posts: 859
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To add on what WRMETTLER stated, check the bolt carrier key to make sure it's not too plugged up with carbon or other debris. I've done some research the past few days on this, and build-up seems to be a primary cause from what I gather. Also, check the key/tube alignment by field stripping the bolt carrier group, then inserting it into the rifle, hold at a 45 degree angle, move the carrier flush to the rear of the upper receiver, and let it drop (charging handle latched of course). It should be a smooth operation. If binding occurs after cleaning, it could be barrel nut alignment, bent gas tube, or bent carrier key. Just another possibilty. Back in my lane. Out.
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BryanK is offline
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10-23-2008, 19:56
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#17
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Quiet Professional
Join Date: Jun 2006
Location: Tennessee
Posts: 1,479
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Every time it fails to fire, remove optic's and take 5 lb hammer and beat the upper till it complies with your demands, then re-oil bolt and re-chamber ammo, fire more rounds. If problem continues beat the lower into submission. sooner or later it wont jam anymore, or wont work at all, in the case of later return to manufacture and demand your money back. 
Last edited by 7624U; 10-23-2008 at 20:01.
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7624U is offline
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10-23-2008, 20:18
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#18
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BANNED USER
Join Date: Aug 2006
Posts: 1,189
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Quote:
Originally Posted by 7624U
Every time it fails to fire, remove optic's and take 5 lb hammer and beat the upper till it complies with your demands, then re-oil bolt and re-chamber ammo, fire more rounds. If problem continues beat the lower into submission. sooner or later it wont jam anymore, or wont work at all, in the case of later return to manufacture and demand your money back. |
I did that with a Bushmaster, it seemed to work fine after the beating. 
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82ndtrooper is offline
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10-24-2008, 08:49
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#19
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Quiet Professional
Join Date: Jul 2006
Location: Germany
Posts: 400
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This weapon is "IG Inspection" clean. No carbon build-up anywhere.
I ordered an H2 buffer and a new buffer spring resterday. If that doesn't fix the problem, I'll look at other possible timing issues.
Thanks!
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ODA 226 is offline
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10-24-2008, 18:03
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#20
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Quiet Professional
Join Date: Dec 2004
Location: Boise area, ID
Posts: 319
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Your problem is bolt bounce. What you need is a buffer with a sliding countermass. A harder spring will not help (hammer spring or action spring).
We ran into the same problem on the first Masada, that's why the carrier has a sliding mass.
Basically as your bolt carrier slams home and trips your sear (which releases the hammer), the carrier then bounces back off the face of the barrel extension and pulls the gun slightly out of battery, and also doesn't allow full firing pin travel (thankfully). The hammer hits it at this inopportune time.
Grab a buffer and shake it back and forth, if you feel something sliding in there (usually a tungsten weight), then you should be good to go.
Let me know if you have any questions,
Justin
Last edited by Justinmd; 10-24-2008 at 18:07.
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Justinmd is offline
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10-25-2008, 00:42
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#21
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Guest
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Quote:
Originally Posted by Justinmd
Your problem is bolt bounce. What you need is a buffer with a sliding countermass. A harder spring will not help (hammer spring or action spring).
We ran into the same problem on the first Masada, that's why the carrier has a sliding mass.
Basically as your bolt carrier slams home and trips your sear (which releases the hammer), the carrier then bounces back off the face of the barrel extension and pulls the gun slightly out of battery, and also doesn't allow full firing pin travel (thankfully). The hammer hits it at this inopportune time.
Grab a buffer and shake it back and forth, if you feel something sliding in there (usually a tungsten weight), then you should be good to go.
Let me know if you have any questions,
Justin
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This one. Most full autos have some sort of anti bounce wieght in the bolt so it stays shut in full auto. Change the buffer to one with a sliding weight and it should fix your problem. Also if the gun isnt an original shortie or even if the barrel manf. didnt get the port size correct, it could cause excessive bolt velocity which could be causing the problems youre experiencing. If this gun is ran suppressed that may only aggrivate the problem. Its either port size and its getting overgassed or the buffer needs to be changed. Alost of this has been said but without knowing your manf. its hard to know gas port sizes and such. Theres only a couple companies that actually have the port size right for shorties. LMT, Noveske, Colt, are the few I know are correct. Barrels from bushmaster, RRA, and YHM, just to name a few arent correct and can result in beating the crap out of your gun along with the problems youve described. Hope this helps.
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12-15-2008, 12:00
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#22
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Quiet Professional
Join Date: Jul 2006
Location: Germany
Posts: 400
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The H-2 buffer installation did the trick! My baby runs like a dream now! Thanks all!
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ODA 226 is offline
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12-15-2008, 12:18
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#23
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Quiet Professional
Join Date: Jan 2004
Location: Free Pineland
Posts: 24,825
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Quote:
Originally Posted by ODA 226
The H-2 buffer installation did the trick! My baby runs like a dream now! Thanks all!
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I thought so.
Happy blasting!
TR
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