New ar10 build

Thebear_78

Private
Minuteman
Jun 5, 2018
19
11
6
I’m putting together the parts for an AR10 build.

Gibbz side charging upper/lower set
Proof 18” carbon fiber barrel
Magpul moe+ grip and CTR stock w/ 1/2” riser
Giesselle SD3G trigger
Superlative arms adjustable gas block
Brownells DPMS style bolt carrier group w/jp bolt
Aero m5 handguard

I’m going to mount a Burris XTRII 1.5-8 on it.
I’m actually building the rifle around the optic, I had it on a 450 bushmaster but didn’t seem worthy of the scope.

Anything I’m missing? Parts should start arriving this week.
 

elmuzzlebreak

Private
Minuteman
Oct 15, 2018
48
19
12
Buffer system is all I am not seeing here. Just make sure you get a full mass system. Proof barrels can be finicky with silent capture systems.

Muzzle device.
 

Coffee_and_Pipes

Private
Minuteman
May 6, 2018
62
10
12
Denton, TX
It’s always in the back of my mind to try building a large frame AR. Is there much play between the upper and lower with the Gibbz set? Also, how tight was the fit between the barrel extension and receiver? Thanks for sharing your build with us.
 

Thebear_78

Private
Minuteman
Jun 5, 2018
19
11
6
Well it’s accurate but it not cycling. It’s short stroking. It’s only ejecting 20% and not picking another round up.

I picked up another non adjustable gas block to try out, I also grabbed a couple different buffer weights and a lighter buffer spring to try.

I’m wishing I had gone with the jp lightweight bolt carrier.

I’m guessing it’s undergassed but I really don’t want to go drilling bigger ports in the proof barrel if I don’t have to.

Any ideas?
 

Ravenous

Private
Minuteman
Mar 10, 2019
18
10
6
It’s always in the back of my mind to try building a large frame AR. Is there much play between the upper and lower with the Gibbz set? Also, how tight was the fit between the barrel extension and receiver? Thanks for sharing your build with us.
I can't comment on the Gibbz lower and upper receiver mate together but I have the Gibbz upper on a Next Level Arms lower for my current 6.5CM build and the machining and fit is outstanding. I was worried because Gibbz wasn't a very well known company but couldn't be happier with it so far. Haven't shot it as I'm still waiting on some parts but the barrel extension to receiver fit is nice and tight as well.
 
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