I have what is probably a no brainer for y'all but I thought that I'd better ask before laying out the cash.
I have a Colt 9mm set up (Colt upper, Colt barrel, ramped Colt bolt and what I think is a Rock River Arms bottom insert magblock) that runs like a top. Using Colt and Uzi mags the BHO works. Uses standard hammers.
I also have an Oly 9mm upper that uses unmodified Sten mags with a socom mag block. Different but it works great. Just don't hit the mag release!
Anyway, I am building another 9mm upper. I have a Colt 9mm upper and a Rock River 16" midlength barrel. I haven't purchased a mag block or bolt yet. I know I definitely want a ramped bolt.
I know the Colt bolt and RRA mag block work together. My question is will a CMMG ramped bolt and a Rock River bottom insert mag block work together? Or should I cough up the extra cash for a ramped Colt bolt? Or maybe a different mag block? (Hahn, Spikes, etc.?)