Light primer strikes

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Jumping Frog

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Dec 25, 2007
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Texas
S&W M&P .40.

Well, I started writing this message while I was sitting on hold with S&W customer support.

I'd had occasional failures to fire due to light primer strikes -- roughly four-five times in the last couple thousand rounds. The primer will have a very light dimple. Tap, rack & shoot has always had the next round fire.

I made sure the striker was removed and cleaned -- no gunk in the channel.

When I put a pencil in an empty barrel and dry fire, it jumps (or rather twitches) about 1/4 to 1/2 inch. I've had other striker-fired guns that would darn near launch a pencil into the ceiling.

Here is a video, if interested. th_6e511cab.jpg

So, I was going to ask what people suggested, but meanwhile S&W customer support answered the queue and they are mailing me a new striker assembly. So instead of asking what to do, I guess I am just noting that I am glad I purchase primarily from first tier manufacturers with a reputation for customer support.
 
Most striker fired guns I have tried, like Glock, will barely move a pencil.

It was a good test on guns with inertia firing pins and unlimited FP travel, like a 1911.

Not so much on stiker fired guns with practically no FP travel in my experience.

Hopefully the new striker assy will fix the problem.
But I wouldn't expect it to stick a pencil in the ceiling.

rc
 
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