AR malfunctioning

[5pins]

I was at a local gun store and saw to carbines with rifle extensions like the one masshole has. I have never seen one before but I just moved to a ban state last month so I better get used to it.

[AR-10]

Stake your gas key and the screws should stay tight:

http://www.weaponevolution.com/forum...1560#post21560

[Xrugger2012]

First I would check to ensure the three rings on the bolt do not have the open spot in the same place, if they are, seperate them to roughly 1oclock , 4 oclock, 8 oclock. This seals the bolt, replace the Rifle buffer. Run some rounds through to repeat the failure. if it still fails there is a gas leak somewhere.

[Eric]

First I would check to ensure the three rings on the bolt do not have the open spot in the same place, if they are, seperate them to roughly 1oclock , 4 oclock, 8 oclock.

Nope. When the bolt is inserted into the carrier there is a slight taper which compresses the gas rings, closing up the gap. Even if you stagger the rings, they move around during firing and can line back up. Not that it's recommended, but the system will function with a single gas ring.

[Xrugger2012]

Yup Wrong Spring and Wrong Buffer.

[Eric]

It turned out that the gas key was in fact loose the slightest bit. I tightened the screws down and it cycled like a dream.

To properly make the repair, new screws should be used. They need to be torqued to 50-58 inch pounds and staked in place. If you need assistance with getting it done PM me.

[masshole42]

xrugger- The spring and buffer are correct. The gas key was the issue.

Eric- I was able to make the repair, thank you for your offer to help.