If I was making BigJ's trigger guard, I'd make the foot print the same as the backward M-700 part to avoid a special bottom inlet by McM.
DF
That’s exactly how I did it. The base of my triggerguard is the same dimensions as a factory ADL triggerguard, the triggerguard opening is just moved further forward. The rear screw hole uses the rear action screw as one would expect, the front screw hole is blind (located where the front of the triggerguard hits the base) and tapped for a hidden screw which comes from the inside of the stocks mag well where I used a button head capscrew to secure the front of the trigger guard.
I am not setup for production, but someone like Willie Manning could crank something similar out for reasonable money I’m sure. And since he is so well known in 600/660 circles already, that’s who you should approach.
