Adjustable gas blocks
- Thread starter Shadow knows
- Start date
It’s been awhile so idk what’s in mine but I put a superlative in my AR10 6.5 cm with no issues and the CM is more finicky than the 308.
I have an Odin in my Grendel with no issues but I got barrels coming in and need gas blocks for them. Thus the question.
I've only used SYRAK in the past but I think they are made by Superlative by the looks of both.
Excellent fit and the melonite finish is nice, never had any issues with the ones I have. The only small issue I've noticed and I'm sure it's due to design but has zero effect on function is some minor gas leakage around the adjustment screw and detent pin.
Excellent fit and the melonite finish is nice, never had any issues with the ones I have. The only small issue I've noticed and I'm sure it's due to design but has zero effect on function is some minor gas leakage around the adjustment screw and detent pin.
I’ve got SLR, Syrac (which I don’t think are made anymore), Odin, Seekins, and Superlative.
They all work well, but the adjustment gets full of carbon over time.
Hopefully Padom will chime in and reiterate his years of experience, and why Superlative is #1.
They all work well, but the adjustment gets full of carbon over time.
Hopefully Padom will chime in and reiterate his years of experience, and why Superlative is #1.
Seekins Precision worked just fine on my AR10 and on my latest AR15, I’m using a JP/Syrac adjustable gas block. Of the 2, I prefer the Syrac because of the click style adjustments.
Didn't Syrac go out of business? They were discontinued by Brownell's and they don't have a website anymore.
I have a Syrac adjustable GB that has worked flawlessly for a few years but I lost a part trying to clean it (long story). I like how compact it is for clearance under small diameter rails (NSR, KMR, etc.)
I would like to know more about the Superlative. My concern is the bleed off setting while shooting suppressed. Is carbon just caking all over the barrel? Mine is bead blasted...
Im not sure what I have, I think its a Syrac on 3 rifles. I need another one now, but I need to make sure whatever I get is going to fit under a KMR or Midwest Ind rail.
1.) There is a huge difference between the older set-screw style adjustable gas blocks (AGBs) like JP's and the newer detent style like SLR and Superlative Arms (SA). The newer detent versions are massively more reliable and easy to use than the set screw versions.
2.) Superlative Arms and SLR Rifleworks are the two kings and really the only ones I'd buy as of now. The major difference is the bleed off of the SA. The bleed off doesn't cake barrels. It is a touch quieter with a suppressor. It doesn't gum up (although my SLR blocks don't either if I just click them one up one down every few thousand rounds). But on the flip side, if you are using a very high gas situation like a 14.5in carbine gas .308 barrel, or a 7.5in pistol gas 5.56 barrel, then the SA block will not be able to bleed enough gas to function properly. So in those edge cases, go SLR hands down. Otherwise, the SA block gets the nod, but really you cannot go wrong with either.
3.) Syrac--->SA basically. But SA has an improved design now with their bleed off blocks.
2.) Superlative Arms and SLR Rifleworks are the two kings and really the only ones I'd buy as of now. The major difference is the bleed off of the SA. The bleed off doesn't cake barrels. It is a touch quieter with a suppressor. It doesn't gum up (although my SLR blocks don't either if I just click them one up one down every few thousand rounds). But on the flip side, if you are using a very high gas situation like a 14.5in carbine gas .308 barrel, or a 7.5in pistol gas 5.56 barrel, then the SA block will not be able to bleed enough gas to function properly. So in those edge cases, go SLR hands down. Otherwise, the SA block gets the nod, but really you cannot go wrong with either.
3.) Syrac--->SA basically. But SA has an improved design now with their bleed off blocks.
I have had both Superlative and SLR AGBs on different rifles. Armalite AR10 in 308 and MK12-ish have Superlatives and Maten MKM with 308 rifle length and another MKM in 6.5CM in +2 have SLRs. I still have all but the AR10 as it was redundant to the MKM. Both AGBs have worked equally well for me but if you have a suppressor cover on your can and it is a couple inches or less in front of the Superlative block, your cover won't last long ... from experience.
Of every three gun match I have ever been to, the only guns that go down hard in the match have an adjustable gas block. I have seen SLR, Syrak, and Superlative all mess up a gun to the point the gun was useless. Typically what happens is the run out of set screw adjustment due to fouling which blocks the gas port. I have seen several people break allen wrenches trying to adjust them because of the carbon build up.
The issues I see is when 3gun rifles are tuned to the edge of reliability for sake of recoil. Low mass BCGs, reduced power ammo and adjustable gas blocks can cause problems if you don’t understand the system and variable.
I’ve seen temperature effect things too. Guys tune a gun in the summer and it chokes doesn’t cycle when it gets cold.
Moral of the story a little extra gas does hurt, but you don’t want to be grossly over-gassed either.
