CMMG Guard in .45 build

[Baltimoreed]

Thinking about another AR.45 build using a CNC Enterprise dedicated greasegun mag lower and a DPMS slabside upper. Im curious about the CMMG Guard .45 delayed blowback system. Wondering if the 45 bcg and bbl will work with the greasegun lower. I’ve built 3 ar .45s using Olympic bbls and bcg and I like GG mags. I know the 9mm is the go to pcc competition round but I want a 45 and don’t want to buy glock mags. Got plenty of GG mags.  I’d appreciate any input. Here’s my last, an AR45/MP5 pistol build.

Edited October 14, 2019 by Baltimoreed