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I THINK that my front roll pin is starting to back out
. I used a small nail and hammer to tap it in a little bit, and am going to keep an eye on it. I only have 1400 rounds through it. Any info I should have regarding this?
 

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make sure which pin it is.



get some loctite and apply it to the end.



not sure if the slide stop has the pin running through it and has a recess cut into the pin to keep it from walking.
 

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The front roll pin is supposed to stick out to the left a little bit. (If you are looking at the pistol from butt to muzzle.)

I would not put loctite on the roll pins. Those roll pins are really tight. If you do have one walking a little bit, then replace it with a new one.
 

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the front roll pin sticks out to the left some because it works double duty holding the gun together AND acting as a sstop for the takedown lever.
 

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To move the roll pins you should really use a roll pin punch made specially for roll pins. They have a projection on the end that slips into the center of the pin and helps in not buggering (tech term) up the end of the pin.
 

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JackB said:
To move the roll pins you should really use a roll pin punch made specially for roll pins. They have a projection on the end that slips into the center of the pin and helps in not buggering (tech term) up the end of the pin.


Help out a guy if you could. Why use roll pins and not just regular hardened pins like the Glock uses? I'm pretty sure there is a good reason. I'm just not sure what it is and am looking for help. Thanks!
 

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a roll pin acts as spring of sorts keeping pressure on it's suroundings to help hold itself in place. Rather than a traditional pin that can walk out given time
 

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My rolll pin that engages the notch in the take down lever on my M&Pc 40 is walking a bit under recoil. I'd like to try installing a new roll pin. Does it matter from which side of the frame you knock the old one out? And yes, I have a roll pin punch. Thanks.
 

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After about 100 rounds or so my locking block coil pin backs out to this point and stops. But that's further out than I'd like it to be. This is a brand new pin. The original pin did exactly the same thing. Any tips on preventing this? Thanks.



 

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Kraigster414 - That's the way it's suppose to be. See the half-moon notch on the takedown lever? The roll pin acts as a stop for it.



You're good to go.
 

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m4arc said:
Kraigster414 - That's the way it's suppose to be. See the half-moon notch on the takedown lever? The roll pin acts as a stop for it.



You're good to go.


I don't believe it's supposed to be that far out. It was not when I got it new, unfired (nor is out that far in my 9c). The pin only has to be out a little to engage the notch in the take-down lever plus when it's extended too far out, you risk snagging the gun on the inside of your holster or on your clothing. I hope that's not the way it's supposed to be. :?
 

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The exploded diagram I downloaded from Brownells shows that pin being removed from right to left, the same direction your photo shows it walking. And yeah, I also don't think it should walk out this much. I haven't experienced this...yet.
 

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politegunner said:
The exploded diagram I downloaded from Brownells shows that pin being removed from right to left, the same direction your photo shows it walking. And yeah, I also don't think it should walk out this much. I haven't experienced this...yet.


My gun is on its way back to S&W to address the "restless pin syndrome," aka: RPS




If you are having problems with your locking block coil pin walking, Dan Burwell suggested this but makes no guarantees:



"You could try “denting” the pin by laying it on a solid surface putting a regular screw driver on it and smacking the screw driver with a hammer. This will make the pin kind of oblong and should tighten it up a good bit. Just don’t go to wild on it or you won’t get it back in..." Position the screwdriver about 1/8 inch from the end of the pin.
 
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