If there is anyone on here looking at geissele in house produced barrels id caution you to look at something from criterion.
I purchased a factory 16" super duty mod 1 16" complete upper receiver kit (EBCG, upper,super42 H2,trigger). When i took my normal array of ammo to the bench to figure out what the upper liked i was severely disappointed.
The ammunition i took were :
Federal M855
Federal M193
Federal Gold metal match 69grain and 77grain .223
Nosler Match (black box) 70grain .223
IMI razor core 77grain
Of all the flavors, the TIGHTEST GROUPING was IMI 77 grain at 4 MOA, shot with a NightForce ATACR in a reptilia mount, bi-pod, rear bag, geissele trigger etc. mount and rings were torqued to factory specs.
After seeing the results I went home, cleaned the barrel, took apart the entire upper re-torqued the barrel nut, hand guard, scope mount, etc, confirmed the scope's reticle was level, confirmed occular.. everything i could think of.
The following week I went back out and had similar results.
When I went back home I completely removed the Geissele 16" barrel and noted that the feed ramps looked like a beaver

had milled them out and not a high quality machine, the ramps were extremely jagged on both edges of either ramp and unpolished somewhat pitted/rough.
When I contacted geissele and sent them photos of the feed ramps, the lack of accuracy for a premium barrel in a premium factory upper, and my concerns, I received a RMA to send in the barrel which I did.
I relayed to Geissele that I had an event I was going to shoot with it and had purchased a criterion which functioned flawlessly and gave me sub MOA 5 shot groupings with IMI 77grains and would not be sending the entire upper, just the barrel. They said that was ok.
Weeks go by and I get a box from geissele, im thinking they RMA'ed my barrel and replaced it... when i open the box i see that its the exact same one that I originally sent to them. When I called and asked if they shot the barrel they said "no" and that they "looked it over" and that it was "fine" they then said that they gave me a complimentary feed ramps polish....
My question to them that went pretty much unanswered was "If im telling you my best group with a vast group of different ammunitions is 4 inches at 100 yards from the bench, supported, and on top of it im telling you there are machining defects visible on the barrel extension itself...wouldn't that suggest that it is possible something is out of wack with the barrel and would warrant at least being test fired?"
Extremely long story, they offered me a small discount code and told me there was nothing more they could do. I offered to give them the barrel back and they could keep it for free which they declined.
/rant over
I like geissele products but ill never run another geissele barrel so long as criterion is around.
The photo included shows the feed ramps, that is after the second range trip with that factory assembled Geissele 16" Super Duty mod 1 upper receiver, there were "maybe" 60 rounds through it at that point, look how torn up the ramps are.