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Old 04-19-2017, 10:03 PM
belizeanboy belizeanboy is offline
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Default Not ranting nor raving - I love the sd9 - but have a question for the group

Guys only asking if your Sd9 or Sd9ve has a horizontal movement of the side (left to right; right to left) especially when magazine is removed and unchambered? My sd9 has a noticeable slide movement (side to side) as described and wanted to know if others experience the same movement with your sd9 or sd9ve? Let me say that it does not affect accuracy or reliability but does mess with my mind a little due to the noticeable slide play relative to the frame. Once chambered the slide does become tight - no side to side movement.

Anything for concern? Thanks.
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Old 04-20-2017, 12:04 AM
jimtr6 jimtr6 is offline
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My SD9VE has very slight slide movement side to side that you can feel but not see, at least to my 69 year old eyes. My wife's Sig Sauer P238 has less movement, but my other SD9VE has more in that you can see the movement if you're looking for it that I never noticed before. Her Ruger SR22 is somewhere in between the two SDs. Hope this helps and not just muddy the water.
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Old 04-20-2017, 12:28 AM
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S&W Rover S&W Rover is offline
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My SD9's slide has a little movement from side to side. It does not "rattle" per se, but can be moved by hand a fraction of an inch. This is fairly normal, I think.

A round in the magazine, pushing up against the bottom of the slide, makes the side-to-side movement a little harder to detect, but it is still there.

The inside of the groves in the slide obviously have to be just a tad wider than the outside edges of the rails, which is what allows this side-to-side movement.

This little bit of slop allows the gun to function reliably during the full movement of the slide on the rails. It also allows some extra tolerance for expansion and contraction of the metal parts under different temperatures, such as when the metal expands on a hot day or after a number of rounds are fired, or when it contracts on a very cold day (I'd expect a little more side-to-side movement on a very cold day).

But if the slide were absolutely tight on the rails, then there could be too much friction or resistance to movement by the slide. And taking up that bit of slop would require very precise placement of the rails and very uniform milling of the grooves in the slide, both somewhat difficult and more expensive to achieve. Since the rails on the SD family are part of the Sear Housing Block and the Locking Block (which are held in place by pins inserted through the polymer grip frame) the molded frame would have to be made extremely precisely -- and we know that SD9/40 and SD9/40VE frames can vary a bit from sample to sample.

This little bit of slop occurs on a lot of different pistols. I just checked my Sig P239 and a 25 year old Mdl 5906; both have a little movement (the 5906, with full length rails, has the least).

Do others notice the same little bit of side-to-side movement in their SD9/40 and SD9/40 VE pistols? In other pistols?
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Last edited by S&W Rover; 04-20-2017 at 12:46 AM.
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Old 04-20-2017, 11:05 AM
BlueArch91 BlueArch91 is offline
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I have noticed similar play in my SD9VE. It is more noticeable when unloaded and dry firing.


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Old 04-20-2017, 11:41 AM
TX-Dennis TX-Dennis is online now
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Every semi auto I own (8 of them currently) has some side to side play in the slide. It's just the nature of the beast.
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Old 04-20-2017, 03:59 PM
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leejack leejack is offline
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I imagine it allows for flex when the gun is fired.
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Old 04-20-2017, 04:43 PM
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Rustyt1953 Rustyt1953 is offline
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I have run across 1911's that could moonlight as maracas.

No need for worry.
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  #8  
Old 04-20-2017, 04:45 PM
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sixtwoniner sixtwoniner is offline
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Yes, my SD9VE also has a slight bit of lateral play in the slide, both the newer one and the one with about 6k down the tube. My Glock 21 has a bit more but still minimal.
I don't notice any more on the well worn vs. the newer one. Must be an engineering thing.
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Old 04-21-2017, 01:29 AM
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Disabled1 Disabled1 is offline
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Yep, all (5) of mine are like that.
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