The RRA bolt was identical to the CMMG. Same bolt modification.
The bolt modification doesn’t do anything against your original conversion. Why buy another bolt? Would that not be a waist of money? Make the bolt modification, no matter what conversion you go with, the same upper and bolt go with what ever lower you want to use.
Doing everything we can do supply the lowers. Working one the 9mm, 40S&W, and 357sig uppers. The 22cal uppers will fit in some day.
Correct. Like I said before, trying to fill the demand. Sorry about any wait.
I am building some more lowers this weekend. Should have some back in stock next week.