Looks nice, although as pointed out, one of the defining feature of the M933 that makes it what it is, is its 11.5" outer barrel.
This one looks like it's even shorter than a CQB-R outer barrel (which is 10.5").
The length of your original barrel looks closer to a 933.
Hehe. Sorry, don't mean to rain on your parade. I'm just a bit of a stickler when it comes to naming convention.
Cheers