Took the grendel out in the back yard today, I chambered a round and took the mag out, fired the round and the rifle didn't lock back.( to be honest I dont know if an ar will lock back without a mag). I was a bit concerned, but I stuck the mag in and fired off 5 rounds as fast as I could pull the trigger. Everything functioned and cycled fine. The brass on the first shot ejected ar about the 3 position but follow up shots ejected about the 2 position. I'm guessing it's a little undergassed. The bolt not locking back doesn't concern me much, but I'm worried it may cause problems in the future (short stroking) on hunts. What direction do I turn the screw to adjust, in or out? Ammo used was hornady black. The recoil on this rifle is amusing at best, it can be compared to my magnum research 22 mag.
Psa upper. Newbie to adjustable gas block
Collapse
X
-
Bolt locks back on empty mag only; will not lock back without the mag. Insert an empty mag, draw back the BCG. Inspect for effect.
I don't know off the top of my head an AGB that uses a left handed gas adjuster, so right all the way would be off. Which gas block do you have?
Generally, I start from all the way open and adjust down until my brass falls where I want it to, and my carrier locks open reliably on an empty mag. Can take a few rounds, especially to test sufficiently, but is easy to do.Nothing kills the incentive of men faster than a healthy sense of entitlement. Nothing kills entitlement faster than a healthy sense of achievement.
-
-
2:00 sounds over gassed, especially if it didn't lock on the empty after the 5 round rapid fire.
Under gassed would land 5-6:00 and more likely to short stroke causing a stoppage or just putting the round back in the chamber. Click
ARejectionpattern.jpgSticks
Catchy sig line here.
Comment
-
-
Late to the thread. I was gonna say righty-tighty lefty-loosey but A5 beat me to it. You should also check to see if the AGB has a set screw AND a lock screw... 2 on top of each other.
I also vote for the over-gas as Sticks above.
The rifle may not smooth out until ~50 rounds or so down the tube, all the parts need to wear in to each other, chamber lugs, bolt, bcg, etc etc.
Try 1 round inserted to mag, pull back chg handle and release to load it, then shoot and examine the lock back to see if it's all the way back."Down the floor, out the door, Go Brandon Go!!!!!"
Comment
-
-
Something else to check for brass being ejected forward, see if the bolt face when you manually pull back all the way till it stop on the charging handle. Bolt face should stop in front of the back edge of the ejection port by a 1/8" to 1/4", of it disappears into the receiver the brass can tag that edge and make the brass to do all sorts of things.
Comment
-
Comment