CMMG in SR556

[sknue]

Will the CMMG 22LR coversion work in a SR556?

 

[Richbaker]

It should.... if I was using one, I'd turn the gas to the OFF pos., since the conversions don't use it.....blowback operation.

 

[sknue]

I want to get a SR556 but I also want to be able to shoot 22LR.

 

[SIGWatchman]

The only thing I can think of is the piston reaches a little further into the receiver than a gas tube on a DI AR carbine. I'd hate to see you spend ~$200 on a conversion and not be able to use it. Perhaps asking Ruger is in order.