Slide Curiosity Question?

[CZSteve]

Just curius,

Of course aware that my CZ's slide rides w/ the lugs 'inside' the rails of the frame and just noticed that the Sig Neuhausen apears to be of the same design.
http://gunbroker.com/auction/ViewItem.asp?Item=10100853

My understanding is that this design can be tighter as the gun heats up and the metals expand. I personally like the design because I like to 'ride' the safety when shooting and this provides more clearance between my thumb and the slide.


Questions:

Who else makes this style of slide?

What are the design Pro's or Con's?

I hate when I have to know the why.:banghead:

Take Care
Steve

 

[Walt Sherrill]

The SIG P-210 uses this approach, as do other guns, including the CZ line, and some S&W semi-autos. (My 4006 has both inside and outside the frame features; inside on the front, outside on the rear.)

Its of questionable value -- because most experts argue that slide to frame fit accounts for only a small portion of a gun's accuracy. Barrel to slide fit being much more important.

I have several CZs and love them, and had a P-210-6. They're all great guns. But now that the P-210-6 is gone, my most accurate auto is a S&W Model 52-2, and that slide rides outside the frame.

The design, I would argue, isn't as important as how well its done.

 

[dfariswheel]

I believe the CZ/SIG slide design is actually known as the Petter design after an early inventor that first used it.

There is some discussion about whether the CZ-type slide is intrinsically "better" than the Colt-Browning design. It does offer better support and guidance for the slide, but whether this translates into better accuracy or reliability is uncertain.

One "Con" of the design is the slide doesn't offer as much to grab when operating the slide. These guns have a reputation of being more difficult to quickly clear stoppages because of the reduced grasping area.

 

[Daniel Watters]

FWIW: Browning used reversed rails in the circa-1922 prototypes of what eventually evolved into the Hi-Power.

Charles Petter's "design" was for the most part directly cribbed from earlier Browning and Saive designs submitted for previous French pistol trials.