Having the blues on recently built AR. Problem is this was supposed to be my flagship AR.
Problem: I am getting a random issue of failure to lock back after last round. Compounded by it being totally random and unable to duplicate intentionally. About every 3-5 magazines I get this failure. No other cycling issues.
Other symptoms of note:
-Ejection is about 1:30-2:30 with brass bouncing off deflector. Indicating over gassed.
-Ejection is weak, hitting the ground about 3 feet away, indicating under gassed.
- Ejection pattern and strength does not change when swapping buffer weights, buffer springs, bolts or carriers. Suppressed and not show no difference.
-Recoil is normal, not notably sharper or weaker than a standard middy.
All parts are new.
Build Specs:
-Barrel: 16" mid-length Noveske N4 light barrel with pinned gas block. Research shows Noveske runs a little over gassed, but nothing more than H2 is usually needed.
-BCG: Ranier Arms nitride. Gas rings and key all good to go. Black insert and O ring on extractor.
-Buffer set up: Geisselle Braided 42, with both H1 and H2 weights.
-Bolt Release: Strike Industries. Moves freely and engages when manually cycled on empty mags. No BAD lever or anything hanging off it.
What I have tried so far, doing so one at a time.
-Different ammo. All ammo has been brass cased mil-spec or better that has always been solid performers in other ARs.
-Different mags. All quality mags that have been good in other rifles. AR mags are cheap, I toss any that don't function.
-Buffer weights. With the super 42, I tried H1&H2. Then tried Spikes ST-T2 which on my scale is between H1&H2, with a standard buffer spring. Have not tried standard carbine buffer yet.
-BCG was swapped with a BCM, and another Ranier Arms.
Things I've checked.
-Gas block has no notable leaks.
-Gas tube is straight and center. No unusual wear on gas key make up. Pinned into gas block properly.
-No unusual wear on BCG, gas key is properly staked.
So...what the heck am I missing here?
Thanks in advanced.
Problem: I am getting a random issue of failure to lock back after last round. Compounded by it being totally random and unable to duplicate intentionally. About every 3-5 magazines I get this failure. No other cycling issues.
Other symptoms of note:
-Ejection is about 1:30-2:30 with brass bouncing off deflector. Indicating over gassed.
-Ejection is weak, hitting the ground about 3 feet away, indicating under gassed.
- Ejection pattern and strength does not change when swapping buffer weights, buffer springs, bolts or carriers. Suppressed and not show no difference.
-Recoil is normal, not notably sharper or weaker than a standard middy.
All parts are new.
Build Specs:
-Barrel: 16" mid-length Noveske N4 light barrel with pinned gas block. Research shows Noveske runs a little over gassed, but nothing more than H2 is usually needed.
-BCG: Ranier Arms nitride. Gas rings and key all good to go. Black insert and O ring on extractor.
-Buffer set up: Geisselle Braided 42, with both H1 and H2 weights.
-Bolt Release: Strike Industries. Moves freely and engages when manually cycled on empty mags. No BAD lever or anything hanging off it.
What I have tried so far, doing so one at a time.
-Different ammo. All ammo has been brass cased mil-spec or better that has always been solid performers in other ARs.
-Different mags. All quality mags that have been good in other rifles. AR mags are cheap, I toss any that don't function.
-Buffer weights. With the super 42, I tried H1&H2. Then tried Spikes ST-T2 which on my scale is between H1&H2, with a standard buffer spring. Have not tried standard carbine buffer yet.
-BCG was swapped with a BCM, and another Ranier Arms.
Things I've checked.
-Gas block has no notable leaks.
-Gas tube is straight and center. No unusual wear on gas key make up. Pinned into gas block properly.
-No unusual wear on BCG, gas key is properly staked.
So...what the heck am I missing here?
Thanks in advanced.