Gunsmithing .300 black out build. Adjustable gas block or not?

[NavyshooterM40]

I am build a 16in .300 black out with a Wilson barrel and hand guard. Plan to run suppressed sometimes should I use a adjustable gas block or not. I have a Odin on hand it will require a little filling on a corner to totally clear the hand guard. I also have a Wilson low profile non-adjustable on hand.

 

[Maverick3009]

I'm currently building a .300blk SBR that'll be run suppressed and as opposed to an adjustable gas block, I opted for an adjustable carrier from Bootleg Inc.

 

[MarkCO]

Suppressed sometimes says to go with an adjustable block. If you shoot mostly subs suppressed, you can get away with a few supers. But running supers mostly set up for subs suppressed, big time wear.

Now if you plan on shooting only subs, sometimes suppressed and mostly not, I'd not bother.

The issue is the gas port size...is it set up for what? BCG, buffer, spring, load and gas port size are all factors in the tune. Adjustable carriers are a hard no go for me. Makes the carrier group even dirtier and thus more wear in the receiver. Just dumps all the extra gas into the receiver when the point is to keep it out of the receiver and in the barrel to keep the action cleaner and reduce the gas at the shooter.

 

[Old Man with Gun]

AGB is nice, Booleg is nicer IMO, but neither is required.

 

[db2000]

I think it makes adjusting for loads easy. Just use a quality one obviously. Seekins, Geissele or Superlative Arms are all good.

 

[FuhQ]

Mine is not, and it runs fine. But in hindsight, I’d probably go adjustable, because it can get a bit gassy. Might look into the Bootleg system.

 

[spife7980]

Why would you not go adjustable? It’s a marginal increase in price for knowing that you can always make it work with a little turn of the wrench vs having to swap springs and buffers etc and hope to mix and match correctly.

Why hope that it does work instead of making sure it works well?

 

[GH41]

I just built an upper around an Odin 16" carbine gas barrel that will never shoot subs or with a can. I used the Odin adjustable block. It is cheap insurance I may never use. Wide open it does nothing. The OP mentioned it >> The Odin block is a tight fit in smaller hand guards. It clears my BCM MCMR but barely.

 

[Snuby642]

I used to pupu on agb till I had to get one for a 6.5g that was overgassed.

Now I put that shit on everything.

The Seekins are working well and thier cs took care of me on one when I needed it.

 

[NightForceNX8]

I hate

I think it makes adjusting for loads easy. Just use a quality one obviously. Seekins, Geissele or Superlative Arms are all good.

 

[wvfarrier]

An adjustible gas block now will save a lot of hassle later

 

[Conqueror]

Dis thread 15 months old broskis

 

[NightForceNX8]

My 300 10 inch I wanted to replace the adjustable gas block for one that is easier to adjust. But when I got the JP u still need to have that tool for the screw lock I hate that but the one I had before was horrible. I had to remove my handguard adjust it from the front the set screw in the side would get loser with every shot and skin I wasn't cycling. I got annoyed ordered the JP and found out u still need to adjust another screw but I loctite them both. I should have bought the kind that has a switch but I don't think I had the room but it's the best because it bleeds gas on purpose no screws to deal with. I've heard the JP was good though I wanted American and I wanted something that held on we and this has 4 screws. Seekins has that side adjustment but u think u still need to find the front lock screw and tighten it. Another alternative would have been I have a law tactical folder and u have the JP SCS adapter ar15 regular weight fires subsonics very well. And I can pop that out and put in one with the h2 and heavy weight spring. If I didn't want to adjust a gas block. Last option is the magnetic buffer but I found that to be annoying it worked. I dampened supers but the last some times didn't stay open. One could keep in their bag a regular spring and regular to h1 buffer and a super 42 spring and H2 buffer and swap that. I think adjustable gas block is the best. Just too late to return JP so I'll just have to try it. I'm sure a company like JP doesn't have their screw just falling out or if it was to losen the lock screw will I lose gas? Who knows till I try. 242 243 loctite. Helps with those screws.

 

[hlee]

I had an adjustable gas block on an 8.5” pistol gas 300 BO. It was an fine suppressed or not, subs or supers. I never went through the process of adjusting it. I wanted an adjustable gas block for a different build and pulled that block off the 300. It is sporting a standard low pro gas block and still runs fine.

 

[Ape_Factory]

I have an adjustable on mine. I've used both the Superlative Arms as well as the JP. The JP seems like it would be easier with the side adjust (depending on your hand guard) but it still has a front lock screw making it just as much of a PITA to adjust. Since I run a suppressor, I often have to take it off to make adjustments and get the Allen wrench in there. I'm dumping them both and going with Riflespeed as it'll be far easier to adjust and I never have to pull out a damn Allen wrench again.

But I'd say they're highly valuable if you shoot both supers and subs.