Ar Help

[littlered]

I got this rifle from a guy in a trade and the upper wasn't completely assembled. I had to get a bolt and carrier, forward assist, charging handle and trap door/ dust cover and install them myself. I also checked the head spacing on it too. The ammo was new Remington 223 55gr brass, but there’s no grantee that it was good I have had some bad one before in other calibers but not often. Other then that the rifle was fully clean and lubed. I will send a pm to Marlin and see what he has to say. Thanks

[Marlin]

PM sent..

[DOC]

The gas key could loose and or not sealed properly. I heard that when a gas key on top of the bolt gets installed that if the bolts aren't staked it will cause failure to feed problems. However, Marlin did offer to look it over. You should take him up on the offer.

[CareyH]

The gas key could loose and or not sealed properly. I heard that when a gas key on top of the bolt gets installed that if the bolts aren't staked it will cause failure to feed problems. However, Marlin did offer to look it over. You should take him up on the offer.

Gas key or gas rings on the bolt, A good way to check the gas rings is take the bolt and carrier out of the gun and pull the bolt forward, set it on a table bolt down, and if the bolt rotates closed under the weight of the carrier the rings are bad.

[sniper_tim]

How often do the rings go bad?

Thanks in advance,
Cheers

[DOC]

They don't usually. But the gas key sits on top the bolt carrier and can come loose unless you stake the 2 bolts in place. A factory rifle is done already but if you put one together yourself you may need to do it.

The 3 rings on the bolt hardly go bad unless they are broke. But they should be set at 120 degrees apart from each other to prevent gas leakage. They are just like the rings on a piston so if you oil it you could go the life of the rifle without changing them.

[sniper_tim]

Well, what was the outcome? Is this rifle behaving now, if so, what was the issue? (I have a rifle with almost the exact same symptoms).

Thanks and cheers,
Tim