Well, my used Single Six frame came in today and it has been installed. THEY ARE NOT IDENTICAL! The tabs in the photo sit higher on the Single Six frame and I lowered them to get the frame to fit. Just a little but it had to be done.
Even with this upward adjustment the tabs at the top of the grip frame are shorter on the Single Six frame and while they serve the purpose of holding the pawl spring and plunger in place they do not quite cover the hole. The attaching holes do line up and the Torx head screws work just fine (NO, not a slotted head torx screw as someone asked) If you think about it, the Torx screw will stay on a power driver much better than a slot head that will not stay on a power driver at all. Time of of the essence in assembly to save costs.
Only fools like me go to the trouble to do all of this but it did shave 4.2 ounces off the total weight of the gun by going to the aluminum frame.
I think I am going to leave this on here until I get a black one and then put it on the black one. Was going to polish the black off the used frame to make it silver. Fit is not close enough to go to the trouble. A glass bead blaster would do the job in no time and leave a nice soft finish that would just about match the silver finish. (In my opinion)
tabs are not straight across the back either. may be in the old frame or maybe a bit more fitting needed.
the die cast grip frame eliminates two parts by casting them into the grip frame. The pin that the trigger spring tabs hook over are cast in and so are the pins to line up the grips. Two less parts to make and install.
The hammer spring is on an identical guide to a Single six, but the main spring is MUCH heavier than a Single Six spring. The trigger return spring is different as well with an additional bend in the open legs that hook over the pin in the grip frame.
