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Old 04-26-2012, 11:19 AM
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Default Lighter Firing pin return spring part#

I have read through the entire Slidefire thread and came across the part where it seems necessary to change the firing pin return spring. People have been posting that they have been getting them at ACE Hardware and Home Depot. I was wondering if any of you guys have a part number for the spring at Home Depot. Home Depot is usually around the areas for most members. Just looking to see if anyone had a part number to make life a little easier.

Thanks!
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Old 04-26-2012, 12:52 PM
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Just bring the old one in, tell em you need one the same length but less rotations/tension. If they stand there and look at you like you just asked them to do trigonometry, keep walkin and find someone else, I find its hit or miss with those guys!
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Old 04-27-2012, 11:55 AM
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Save yourself a lot of time and trouble trying to find a similar size spring. These are precision springs, with the correct ID and OD to fit the pin not to mention they are a select diameter of wire with a specific tension rate. Now it's no secret the factory spring is too long (requires too much hammer spring tension) for the given rebound ( a lawyer thing for sure)......Simply: cut off 1/8" off the stock spring length....This easily preserves the rebound for any slam fire sequence, but greatly improves fireing pin speed and greatly improves .22 ignition......consistant ignition is one of the most important factors in achieving 22 rimfire accuracy............... Best regards Plum
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Old 04-27-2012, 02:47 PM
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Quote:
Originally Posted by Plumbago View Post
Save yourself a lot of time and trouble trying to find a similar size spring. These are precision springs, with the correct ID and OD to fit the pin not to mention they are a select diameter of wire with a specific tension rate. Now it's no secret the factory spring is too long (requires too much hammer spring tension) for the given rebound ( a lawyer thing for sure)......Simply: cut off 1/8" off the stock spring length....This easily preserves the rebound for any slam fire sequence, but greatly improves fireing pin speed and greatly improves .22 ignition......consistant ignition is one of the most important factors in achieving 22 rimfire accuracy............... Best regards Plum
That sounds like a much better idea! I went to Home Depot and got a multi pack of springs.. none fit.. I will give this a try. Can you buy this spring from S&W if I messed it up by chance?

Thanks
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Old 10-13-2012, 11:18 AM
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Thats what id like to know too. Have you found another spring? Or did you clip yours? How did it turn out? My 15-22 has light primer strikes with timney 3.5 installed.
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Old 10-13-2012, 11:25 AM
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Originally Posted by neverenoughguns1 View Post
Thats what id like to know too. Have you found another spring? Or did you clip yours? How did it turn out? My 15-22 has light primer strikes with timney 3.5 installed.
There seems to be more light-strike problems with Timney than all the others combined. Makes me think the problem is a hammer with insufficient mass/inertia.

I have a Jard with a 2 pound trigger and ignition is 100 percent.
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Old 11-27-2012, 11:28 PM
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Wondering if a solution was ever found as to the best place or specific part number for the firing pin spring. I don't want to cut my stock spring.

We have a pair of 15-22's, both set up identically with slidefire and CMC tatical drop in triggers. One runs beautifully, the other is having light strike issues. I plan to test the bolt from the gun that is running well in the gun that is not, to see if I can isolate the issue to the firing pin spring. I'm fairly certain, or at least hopeful that a new or modified spring will resolve it.

Either way, I'd like to find a second spring for the next step.
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Old 11-28-2012, 12:26 AM
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it works fine without the spring,no slam fires i was the one who originaly posted about the spring swap for slide fires,ace has one in their assortment pack that works fine or leave it out--ar's dont use springs and dont slam fire and mine hasnt yet
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Old 11-28-2012, 01:02 AM
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For what it is worth, I used this spring:

McMaster-Carr 9663K13

302 Stainless Steel Cut-to-Length Compression Spring, 20" Length, .187" OD, .017" Wire Diameter, packs of 1

You just cut what you need, and save the rest for the next rifle. It is very weak (almost like no spring), but does enough to keep the firing pin to the rear and fully in the hammer's path.

Since I upgraded to a Timney, this spring has eliminated the light strike.
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Old 11-28-2012, 01:39 AM
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[QUOTE=We have a pair of 15-22's, both set up identically with slidefire and CMC tatical drop in triggers. [/QUOTE]

I have the CMC trigger in mine too. Before I installed it, it was in my AR-10 .308 and it never failed to set off military primers. My point is, I have a hard time understanding how that FCG would have a hard time overcoming the relatively weak firing pin return spring of a .22 rifle. BTW I have never had any ignition problems in my 15-22. And while I don't dispute the result of cutting off 1l8" of the spring, I have to wonder if that is more coincidence than mechanics. I can't believe that cutting that small an amount would change the energy potential that much. Since this seems to be happening more with after market triggers, I wonder if it could be a geometry issue. In other words, is the hammer striking the firing pin squarely? Just wondering.
RichH
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Old 12-01-2012, 02:12 PM
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Just tested the bolt from the gun that runs beautifully in the gun that stops every 3rd to 4th shot with light strikes and the result is the same. This leads me to believe its related to the trigger or hammer mass.

Again, both guns have the same cmc tatical drop in trigger but maybe they aren't exact. I still believe the easiest and cheapest solution would be to cut the fp spring and increase the primer strike. Guess I'm off to ace to see about finding a new spring. I'll also try calling s&w on Monday to see about getting a new stock spring.

Thanks for mcmaster recommendation, where did u get it?
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Old 12-01-2012, 02:45 PM
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Originally Posted by Ufg8rmike View Post

Thanks for mcmaster recommendation, where did u get it?
Where did I buy it? Online at mcmaster-carr.

Why this spring? I measured the factory spring OD and ID, estimated the strength, and then searched on mcmaster-carr for different options. I bought several springs of different strength and approximately same size, and tested them at the range. My goal was go as light as possible without slam-fire. I never had slam-fire, so I kept the lightest spring in the gun.
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Old 12-02-2012, 05:29 PM
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Hello,I,m new.i saw a guy on you tube on the 22lr slide fire.he said to put a 3.5 spr wng & a reverse supressor and it will be a beast.when fireing just slde your hand from back to front of bottom rail.hope this helps.ordered my 22 should be here next wk.probly be asking about sights & lazers then.
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Old 12-02-2012, 05:55 PM
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Originally Posted by pacrat54 View Post
Hello,I,m new.i saw a guy on you tube on the 22lr slide fire.he said to put a 3.5 spr wng & a reverse supressor and it will be a beast.when fireing just slde your hand from back to front of bottom rail.hope this helps.ordered my 22 should be here next wk.probly be asking about sights & lazers then.
Just a piece of friendly advice ...

Put a couple of thousand rounds through your new rifle as it comes out of the box before you start messing with it.

Also, just because something is on YouTube doesn't mean it's good advice.

I have never heard of a "reverse suppressor". Sounds like I'net BS to me.
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