help with AR bcg

[doubletapp]

picked up a 10.5 pistol the other day but getting it home realize the bcg will not return to battery I think it's a gas tube issue anyone have suggestions

Thanks

 

[Kingjoey]

How far out of battery is it stopping at?

 

[doubletapp]

right in the area of gas tube meeting gas key

 

[knockonit]

use a black marker on the gas tube and attempt to go into battery, and see if it looses marking, i thought i had that issue on a couple units, but found the bolt that was in Bcg group was out of spec.
typically its the gas tube bent or out of alignment, but...................................

 

[doubletapp]

The upper and lower seekins presision, the gas block and tube I believe are Yankee Hill.

 

[Medjay]

Most commonly gas tube out of alignment with the gas key. Can come from both parts; gas tube can not be secured properly or is bent AND/OR the the gas key is not properly staked or on an out of spec BCG that has the milled surface that the gas key mounts to "off of table".

Seen both. Try another BCG that you know works and goes into battery on another in-spec gun. Then check upper receiver (upside down/flat on top rail) and make sure there's no play or movement in the gas tube. If there is then you need to break down the upper and start from the front and work back.

IF another known to work BCG doesn't work, it may be worth looking at the feed ramps as well. If the bolt lugs are being disrupted by something blocking them it'll also refuse the bolt and won't go into battery. All kinds of weird stuff can get in there.

Best of luck.