The slide to frame fit is different on the 3953 than my other 3rd gen autos. The slide slightly fits over the frame and with the others there is a slight gap between the slide and frame. Why was the 3953 designed differently? Also is the 3913 of the same fit as the 3953? Unfortunately I don't have one to compare.

I'm guessing you are speaking about the rear edge of the 3953 slide and receiver being longer than that of the traditional DA/SA line of pistols. The longer slide and receiver in the DAO pistols was to conceal the partially cocked hammer.

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VCDL, GOA, NRA

No I am not wondering about the length of the slide. I am talking about how the slide fits on the frame.

That picture is truly worth a 1000 words.

1. Someone started lapping the relative pieces to smooth the slide's movement and got carried away; and/or,

2. A spare slide was, more or less, mounted on a spare frame and, well, you eventually got the result.

Both of the above "possibilities" have occurred to me.

Later,

DC