If you have a straight blowback barrel that you want modified for the CMMG RDB system I can do that for you. $150 to do the work which includes a new M4 extension. $170 to do the work and a new single feed extension. Contact me for sending me your barrel here: Contact Us Here are some examples of this kind of work.
Below is an example where I also provided a new KVP 3 lug adapter and threaded the barrel to match the entire length of the 3 lug adapter. This also requires extending the threads of the adapter itself. This service is an additional $80 which includes the new KVP 3 lug adapter.
