Light primer strikes after DCAEK - MP-Pistol Forum

Light primer strikes after DCAEK

This is a discussion on Light primer strikes after DCAEK within the MP Gunsmithing forums, part of the Smith & Wesson MP Forum category; I had a gunsmith install a DCAEK kit on my 9FS a few months ago, and yesterday I experienced my first-ever light primer strikes with ...


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Old March 20th, 2017, 10:00 AM   #1
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Light primer strikes after DCAEK

I had a gunsmith install a DCAEK kit on my 9FS a few months ago, and yesterday I experienced my first-ever light primer strikes with the gun. Other than the DCAEK kit and XS Big Dot sights, the gun is stock. The affected rounds had slightly dimpled primers; consistent with a light strike.

First time it happened was with 'Perfecta' ammo that had been given me, so I initially wrote it off as an ammo problem. Then a little later I got a second one; this time with USA white box fmj. So that makes me think it's a gun thing and not an ammo thing.

I pulled the striker and while it wasn't completely free of oil, it wasn't dirty at all and imo not anywhere near oily enough to cause problems. I cleaned & dried it anyway, but don't believe it was any part of the problem.

Dry-firing (even after striker & channel cleaning) with an eraser-tipped pencil in the barrel, the pencil doesn't budge much at all; probably not an inch. Most guns will pop it up several inches, and some others (1911's especially) will launch it several feet. So I have little doubt that the striker is simply not hitting hard enough.

The striker is the white version, which as I understand is the stronger style.

Any thoughts or ideas? It's been several months since I had the DCAEK put on, but in that time I've only put a few hundred rounds thru this particular gun.
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Old March 20th, 2017, 04:07 PM   #2
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If it's not an ammunition issue there may be a timing issue with the sear and striker safety. If you can return it to the gunsmith then do so otherwise here is Apex's video on the subject:
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Old March 20th, 2017, 04:48 PM   #3
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Thanks, I've seen that video a while back. I'm not having a dead trigger problem; it releasese the striker every time, it just doesn't hit the primers real hard.
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Old March 20th, 2017, 05:30 PM   #4
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A light primer strike is the "opposite" problem from a dead trigger. The loop is too open and releases the striker before the striker block is fully out of the way.
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Old March 21st, 2017, 03:45 PM   #5
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Quote:
Originally Posted by BennyRayRiddle View Post
A light primer strike is the "opposite" problem from a dead trigger. The loop is too open and releases the striker before the striker block is fully out of the way.
I somehow missed that in the video. I'll check it out; thanks again.
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Old March 21st, 2017, 06:36 PM   #6
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Originally Posted by John in ar View Post
I somehow missed that in the video. I'll check it out; thanks again.
I believe that BRR is spot on; it's a timing issue between the striker release and striker block.
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Old March 22nd, 2017, 06:51 AM   #7
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I believe that BRR is spot on; it's a timing issue between the striker release and striker block.
I`ll back that statement up as well
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