AR-10 Short Stroking Issue

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15 years 6 months ago #1386 by SDDuc996
AR-10 Short Stroking Issue was created by SDDuc996
So after finally completing my AR-10 build, I took it to the range (indoor 25m) to zero the irons. It will clear the spent case but fail to load the next round. I've swapped mags to eliminate that possibility.

Here's what I'm running: AR-10 with 18" Match barrel. 15" PRI Forearm, UBR Stock with Slash heavy buffer and recoil spring.

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15 years 6 months ago #1387 by featherblue
Replied by featherblue on topic Re:AR-10 Short Stroking Issue
What ammo did you use? Where did the spent case land in a 3 to 6 position to your right?

Try one round in the mag and determine if the bolt locks open.

Then get back to us. There are several very experienced AR-10 here.

-fb

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15 years 6 months ago - 15 years 6 months ago #1388 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re:AR-10 Short Stroking Issue
FthBL I agree with you on the ammo inquiry, I know ArmaLite says 150gr to 175gr with 168 being optimum. I'm wondering if it is not the beefed up buffer and spring. I know mine came with a already heavy spring from the factory, that's what the factory told me when I inquired about going with a hydraulic buffer. What is your analysis?
Last edit: 15 years 6 months ago by BUILDING MY SASS.

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15 years 6 months ago #1391 by SDDuc996
Replied by SDDuc996 on topic Re:AR-10 Short Stroking Issue
I'm shooting Match Grade M118 Milspec. Cases are ejecting around 5 o clock and not traveling very far. maybe three feet max.

I originally tried using the AR10 Enidine Collapsible Buffer and Superior Shooting Flatwire Buffer Spring, but the BCG had a really hard time traveling far enough back to pick up the next round. It even felt harder to pull the charging handle back far enough to chamber the next round, so I ended up selling them.

I'm guessing this has to be a gas issue. so I'll be double checking the gas key, rings on the bolt, and gas tube.

Thanks for the help guys.

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15 years 6 months ago #1392 by jeffreytucker
Replied by jeffreytucker on topic Re:AR-10 Short Stroking Issue
I am having a similar problems
When I run the charging handle it loads the bullet fine. but then when I go to shoot the 2nd round I find out it did not load the next round. The gun Is brand new, only a couple months old and only had 40-50 rounds through it. I have used both of the clips that came with it.

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15 years 6 months ago #1394 by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re:AR-10 Short Stroking Issue
Jeffrey, being yours is a factory built one I would definitely call ArmaLite. They may want you to send it in. Believe me it sucks, I know I had to send mine in for a extractor issue, turnaround time was about two weeks but they fixed it and they do stand behind their weapons. As featherblue asked earlier, what ammo are you using. Try cleaning your gas tube and ports on the gas block, then take a can of condensed air, stick it in the gas tube in the receiver and see if you have air coming out the ports on the gas block and barrel. The port in the barrel might be plugged. Either way call the factory.

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