Mag release is there, just milled way down so it doesn't release the mag while carrying the way some that are extended will do.
EDIT: I just realized the pic referred to is on the cunts leg.
So is it something they actually make/made, or just a welded up and ground down Detonics Combat Master?
Edit to add:
"This gun started life as a full size Government 1911 and Detonics Slide that I chopped down. (Both Slide & Frame Were Sectioned and the Middles Removed,"