Hey folks,

I just switched my RAS from an M1S upper to my new CMMG upper and there seems to be a bit more movement coming from the lower half (pistol grip solidly attatched) I know there's gonna be a bit, just suprised me which upper had it!

Could there be slight differences in the barrel lugs? Just seems to be a few thou' between the 2 halves.

Any ideas on how to snug 'er up without spending 100+ on the RAS upgrade?

Thanks for your time!