DPMS AR with feeding issue

dj_28 · January 15, 2013, 10:51 PM

This AR is in 5.56 and when shooting .223 ammo through it, it hangs about every third shot. Would that be do to lower pressures in the .223 or does the gun have problems? I haven't fired 5.56 ammo in this gun yet (can't find any local yet).

DJ

Wyosmith · January 16, 2013, 02:16 AM

Check the 2 screws on the gas key (the dog-legged thing on to of the Bolt carrier)
The must be very tight and staked in place to stay that way. If they are a bit loose the gun will malfunction as you describe.

Scorch · January 16, 2013, 02:18 AM

Beat me to it!

kilotanker22 · January 24, 2013, 10:14 PM

I don't think pressure is the issue. What the last two said seems like a good culprit.

However. I must ask if you lube the bolt carrier and the upper received. If so don't for a free hundred rounds. Leave a it dry. And fire a few hundred through it. After a time it will become polished by the force of the action and feed more reliably.

At least that was my experience in Afghanistan. Deployed with a brand new colt m4. Once you fire a few hundred rounds bone dry and make sure every thing on the fire arm is peachy it will function without fail.

Another problem could be the magazine.

January 15, 2013, 10:51 PM	#1
dj_28 Member Join Date: May 30, 2012 Posts: 26	DPMS AR with feeding issue This AR is in 5.56 and when shooting .223 ammo through it, it hangs about every third shot. Would that be do to lower pressures in the .223 or does the gun have problems? I haven't fired 5.56 ammo in this gun yet (can't find any local yet). DJ

January 16, 2013, 02:18 AM	#3
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	Beat me to it! __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

January 16, 2013, 02:16 AM	#2
Wyosmith Senior Member Join Date: December 29, 2010 Location: Shoshoni Wyoming Posts: 2,713	Check the 2 screws on the gas key (the dog-legged thing on to of the Bolt carrier) The must be very tight and staked in place to stay that way. If they are a bit loose the gun will malfunction as you describe.

January 24, 2013, 10:14 PM	#4
kilotanker22 Senior Member Join Date: October 14, 2012 Location: North Central, PA Posts: 2,117	I don't think pressure is the issue. What the last two said seems like a good culprit. However. I must ask if you lube the bolt carrier and the upper received. If so don't for a free hundred rounds. Leave a it dry. And fire a few hundred through it. After a time it will become polished by the force of the action and feed more reliably. At least that was my experience in Afghanistan. Deployed with a brand new colt m4. Once you fire a few hundred rounds bone dry and make sure every thing on the fire arm is peachy it will function without fail. Another problem could be the magazine.