Question about the adjustable gas system on the SR556...

[ConradM]

So as I understand it, in position 1 it will cycle with the least amount of gas and in position 3 it will use the most gas. My question is, what would be the negative about running it in position 3 all the time?

 

[cluelesspa]

It would hammer the gun more then necessary. less wear on the system running the lowest gas position needed.

 

[redsouthpaw]

Position 2 is for standard ammo. Mine failed to cycle on position 1 with my reloads. It had enough to reset the trigger but didn't eject the brass.

 

[deadduck357]

It would hammer the gun more then necessary. less wear on the system running the lowest gas position needed.

What he said.

 

[blume357]

Another thing to tweak.

 

[TexasFats]

Another thing to tweak.

Actually, it is not a bad idea. There is a difference in how hot military ammo is loaded, compared to the civilian .223. Also, somebody who likes to reload and shoot reduced loads for whatever reason, may still get the gun to function on the number 3 setting. The SIG 556 also has an adjustable gas system with only two positions.

 

[SIGWatchman]

I guess that's the idea, to only use as little as needed to cycle the weapon.

Position 2 is a bit much for Federal XM193 and other full power 5.56 rounds. The brass ejects forward and according to the manual that is an indication to back off to position 1. FYI.

 

[mattsbox99]

Isn't there an off position for use with a suppressor?

 

[deadduck357]

Isn't there an off position for use with a suppressor?

Yes, setting 0.

 

[wetidlerjr]

Another thing to tweak.

Actually, it is not a bad idea. There is a difference in how hot military ammo is loaded, compared to the civilian .223. Also, somebody who likes to reload and shoot reduced loads for whatever reason, may still get the gun to function on the number 3 setting. The SIG 556 also has an adjustable gas system with only two positions.

My Adams Arms conversion unit has "Off" and "High"(normal) and "Low" positions.