I agree there is a resemblance to the Remington Model 51, but I have to note that the Remington 51 is much better made, though far more complicated. The MAB is a simple, straight blowback pistol, while Mr. Pedersen's pride and joy uses a hesitation lock, a form of delayed blowback.
Note for anyone who has a Remington Model 51, be careful in disassembly and above all DO NOT try to remove the grips unless you know how (punch the grip safety pin at the bottom of the grip flush, and slide the grip down to unlock then lift up. Do the same on the other side.). Prying or trying to drive the grips off will break them.
Jim