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AR15.COM
9/28/2010 9:57:28 AM EDT
I added the clamp on kit to my 14" del-ton bbl, and am getting short-stroking. I am using a new chrome POF bolt, and POF roller. No binding, and gas hole is properly aligned. Gas hole is approx .078. Any ideas? Empty ejects, but doesnt recoil quite far enough to pick up the next round or lock back.
9/28/2010 10:19:51 AM EDT
[#1]
Have you tried a different lower or receiver extension?



Sometimes the receiver extension will not be perfectly straight or just out of round enough to cause the bolt carrier to bind up when it is back inside the extension.
9/28/2010 11:07:41 AM EDT
[#2]
No, it did bind to start with, so I loosened the extension, then re-tightened with the bolt locked back. Seems to cycle by hand with no bind, but I guess you never know.
9/28/2010 11:43:06 AM EDT
[#3]



Quoted:


No, it did bind to start with, so I loosened the extension, then re-tightened with the bolt locked back. Seems to cycle by hand with no bind, but I guess you never know.


The carrier tilt during cycling much much greater than when using the charging handle.



I suspect your lower receiver/receiver extension is still causing your issues.



 
9/28/2010 12:04:51 PM EDT
[#4]
OK, I'll give it a try and let you know.
Thanks!
9/29/2010 9:27:44 AM EDT
[#5]
Tried it on a original colt full stock lower. Picked up the next round, but still wont lock back though (tried a previously unused mag too, just to be sure.)
9/29/2010 10:58:47 AM EDT
[#6]
Give a us a call or email tech support and we will get it further taken care of.
9/30/2010 6:30:59 AM EDT
[#7]
Got it! Cheapo barrel machined incorrectly placed the gas opening too far forward, even without a delta ring!