Adjustable gas block or adjustable bolt carrier?

[snackgunner]

Trying to finish up my build on paper. Last decision i need to make is to go with an adjustable gas block or a adjustable bolt carrier for my suppressed sbr build.

Https://www.brownells.com/rifle-part...R%2bRIFLEWORKS

Https://www.rainierarms.com/bootleg-...-carrier-5-56/

Ive read on here of members having a high round count on these adjustable gas blocks and they because of the high round count they would seuze up. With the suppressed bcg there are no springs or pins to mess with.

Anyone who has used both the adjustable gas blocks and adjustable/suppressed bcgs? Which one do you prefer?

Has anyone had an adjustable gas block lock up/seize up on them?

[GH41]

Why not just use a properly gassed barrel?? It doesn't have ANY moving parts. Remember Murphy.

[feraldog]

my readings indicated that where the gas is stopped or released is important

i didn't want waste gas/fouling/heat inside my upper so i decided on a gas block

nor did i want the built-up back-pressure being forced back out the can (causing more heat and noise), so i chose a proven bleed-off gas block that dumps gases forward of the block

after many rounds, none of my Superlative Arms gas blocks have seized up, the adjustment screw turns just as it did when new

check out mike's (aka: mbell556) you-tube vids on them

https://www.youtube.com/embed/UwHA9pvkgYA

https://www.youtube.com/embed/0y02vdDzRUk

---
note: i'm just a user and have no tie to this company


.

[Clint]

Is the SBR going to be 100% suppressed or 50/50 mixed use?

A dedicated suppressed setup should have a properly sized non-adjustable gas port.

[snackgunner]

50/50

[5.56 Bonded SP]

A properly gassed barrel on a di gun is probably your best way to go. The only adjustable gas block systems I like are on long stroke piston guns like the sig 556.

Adjustable bcgs are a waste of money from what I recall. If you are set on going ajustable, I would research the most durable adjustable gas block, a lot of them come loose from what I recall.

[boombotz401]

How does one find a barrel with a port designed for suppressed?


Sent from my iPad using Tapatalk

[diving dave]

I run the bootleg carrier. It has made a huge difference in my 6.8 with a can, which was really overgassed. Only issue I have as a lefty, is when really getting on the trigger it is gassy out the ejection port, but function has been 100%.

[Clint]

How does one find a barrel with a port designed for suppressed?

There are generally only a couple ways to get a small port.

1) Get a 16" carbine barrel cut down to 10.5-11.5"

2) Contact a savvy barrel mfg and ask for a specific gas port

3) Get one of our MicroTUNE gas blocks with a fixed port of your choice


Now a dedicated suppressed SBR will allow the smallest port and best operation with the suppressor, but generally won't function without it.

Mixing suppressed and un-suppressed use involves a large series of different compromises around gassing, function, springs, buffers and adjustable gas devices.

[Biggy]

There are generally only a couple ways to get a small port.

1) Get a 16" carbine barrel cut down to 10.5-11.5"

2) Contact a savvy barrel mfg and ask for a specific gas port

3) Get one of our MicroTUNE gas blocks with a fixed port of your choice


Now a dedicated suppressed SBR will allow the smallest port and best operation with the suppressor, but generally won't function without it.

Mixing suppressed and un-suppressed use involves a large series of different compromises around gassing, function, springs, buffers and adjustable gas devices.

Your BRT EZ tune gas tube is also an option I like. Especially with pin and welded muzzle devices now you can easily tune the amount of gas driving your rifle exactly how you want it