Hello, reaching out for assistance. My suppressor was approved in just one day, and just took it to the range. Sig spear 300 blackout with 9 inch barrel and nomad-l. Fired 20 rounds of horandy black 208 grains. So much gas to the face, I had to stop. First time the gun was fired and used the positive gas adjustment. Very quiet and functional but way too much gas. Any way to reduce this problem or did I buy the wrong suppressor. Thanks for any help
Did you try it with the normal (-) gas position? The + position is essentially an adverse position on the Spear LT which supplies more gas to the system. I know the manual says to use the + position for subsonic .300 blackout, but you may have less gas with the - setting.
Posts: 3525 | Location: South FL | Registered: February 09, 2007
I would think the + setting is the adverse setting, and the opposite way from where you want to go with a suppressor mounted. It's almost certainly the - setting. I'm not surprised you got gassed out.
There's some gas systems for piston rifles out there meant for fine tuning your gun suppressed. There's a KNS brand one for the Bren 2 that has something like upwards of sixty settings. Anyways, my point is, try all of the settings on your gun before you bag it up for the day, and note the recoil, ejection pattern, and gas to the face. It can be a bit of a process with some guns, but that particular gun is meant to be run suppressed, so I'd imagine it's got to be as simple as flipping it to the - setting.
Don't give up on it yet. Besides, the suppressor game (as it currently stands, legally) is a bit of a "no take backs" proposition. You own it, for better or worse.
______________________________________________ Endeavoring to master the subtle art of the grapefruit spoon.
Sig is totally weird and probably wrong on this one. When this was first posted I thought that's odd the OP says the 'positive gas adjustment' which would be counter to my intuition. But when you look in the Sig manual it does indeed say to use the '+' setting for subsonic suppressed ammunition. In any case let's hope the '-' setting improves the situation.
“So in war, the way is to avoid what is strong, and strike at what is weak.”
does the Spear take an AR charging handle? In any case there are a bunch of them and results vary at least on AR's. How that translates to the spear I have no idea because the gas paths are totally different. I like the Geissle. Cheapish to try, but don't expect too much.
“So in war, the way is to avoid what is strong, and strike at what is weak.”
If you can turn down the gas, that is definitely the first thing to try.
Most ARs have a fixed gas block, so we end up putting band aids on, like heavy buffers and fancy charging handles, and vented forward-assists, vented BCGs and whatnot.
