Adjustable Gas Block - Need Recommendations

[Okie_Poke]

OP,

Here's the advice from SLR's website.

[INDENT]Note- If you have a barrel with no dimple or one dimple under the gas port either our .400 or .450 set screw spacing blocks will work fine. There is no difference in the blocks just the front set screw location.[/INDENT]

So it depends on what barrel you decide to get. Some smiths drill one dimple, some two, and some none at all. Lilja machines a flat surface to aid lining up the gas port so with their barrels it's also a non-issue. These 0.400"/0.450" measurements only matter if you're getting a set-screw gas block AND the barrel has two dimples. If the barrel has two dimples, then you need to find out the distance between them get the appropriate gas block. That said, as long as you screw up the one nearest the shoulder first then it won't be a perfect match but should work fine.

As for whether an Adjustable carrier is any cleaner than an AGB, you won't notice the difference. This is because most suppressor soot comes directly from the chamber, not the gas system. I say this after using an Adams Arms piston where the gas system ends at the spigot out front near the block. No gas from the piston can come into the receiver. Yet with a suppressor the receiver would end up just as filthy as a gas impingement system. After firing it all spews back around the case into the receiver while still under pressure.

Thanks for clarifying. I had no idea the soot didn’t come from the gas system.