M&P Pro Core Feed Problems

[Bkreutz]

It sure looks like the striker in yours is farther forward than mine, on mine the front edge of the striker "ear" is midpoint on the block where yours appears to be equal to the forward edge of the block, just about the distance of the projecting pin in your earlier pictures. Maybe the cycling of the slide has enough force to bypass the striker block but doing it by hand makes is seem OK??/ (this is just me thinking out loud). Example, if you manually rack the slide, it loads the round correctly? but when you shoot that round it hangs up the next round on the projecting striker pin?? Have I got the sequence correct? If so, I'm still thinking it's something in the striker block (or maybe something with the striker assembly that I can't see in the pictures. I think at any rate it probably needs to go back to S&W.

 

[gunman9]

If I dry fire it and rack the slide back the pin is exposed the same way until it gets close to contact with the top of the barrel where it then goes back into the slide

 

[Bkreutz]

Something's wrong there, none of my M&P's do that. If I pull the slide back after dry firing the pin is not exposed. The striker pin is only exposed when the slide is in battery and the trigger is pulled. (or if the slide is in my hand and I push the striker block down and push the striker forward. When I release the striker it snaps back into the non firing position.

 

[gunman9]

Ya so something is definitely wrong then. Man that just ticks me off! All this money, brand new gun and it don't work from the factory.....

 

[gunman9]

This is after pulling the trigger dry fire, racking the slide back

 

[Bkreutz]

Yes that really sucks, but if you think about it, that's why there are warranties. If something is going to break, it usually happens when whatever the machine is new. I remember buying a new Bronco in 1990 and went on a vacation. 4 days later the starter went bad in Sacramento CA and it took Ford 4 days to find a starter since they changed the part that model year and no one had one in stock, they ended up pulling a part off the assembly line. I was a bit upset, but what can you do? The M&P's are very reliable (I don't have a Shield so I'm not commenting on them) I've got 10's of thousands of rounds through them. I shoot at least one match per week and have never had a problem with the pistol. (ammo yes, but not the pistol).

 

[Bkreutz]

And here's what mine looks like, same sequence. (the end of the pin is more than 1/16" recessed.

 

[gunman9]

I just seen what's happening. The plunger is not catching it and it is just going completely forward

 

[gunman9]

Not captured

captured because I pushed it back after locking the slide in place

 

[Bkreutz]

So we're down to the striker block, either there's a defect in the plunger, or there's a piece of junk in there making it stick in the down position. I've heard of a "burr" on the hole that the striker block rides in, but the problem there was a gritty feeling in the trigger not the plunger sticking down and not doing it's job. Maybe you should pull the plunger out before sending it in. If there's a problem with the plunger itself, I have a stock one sitting around somewhere (I put an Apex plunger along with the FSS and trigger in around 3K rounds)

 

[gunman9]

Well I already pulled the plunger and seen no issues with it. No burrs or obstructions. It moves up and down freely. But for some reason it's not locking back the striker. What part pushes the striker back to lock it to the plunger?

 

[Bkreutz]

Well I already pulled the plunger and seen no issues with it. No burrs or obstructions. It moves up and down freely. But for some reason it's not locking back the striker. What part pushes the striker back to lock it to the plunger?

That would be the small inner spring on the striker. Try this, with the slide off, push down the striker block plunger and keep it pushed down, then push the striker forward, release the plunger (it should stay depressed) when you release the striker the striker should move back by itself and the plunger click up into it's locked position.

 

[gunman9]

That doesn't happen. The striker just stays forward

 

[gunman9]

any issues here?

 

[Bkreutz]

Looking at the pic of your striker, the main spring seems to be OK, that leaves the inner spring. Maybe it broke. Another possibility is the striker channel guide which is a plastic piece that lines the striker channel, but you have to remove the plunger completely to get that out. I've never seen one of those go bad, but that doesn't mean much. I'd disassemble the striker and see what that inner spring looks like, you can compare it to my picture of the striker and the inner spring. If it's bad give S&W a call and they will probably send you a new striker (they have for me). Anything more than the striker assembly they will make you send it in.

 

[Bkreutz]

any issues here?

Way too clean. But that's understandable since you now own a single shot pistol. (sorry, couldn't resist) This will pass, I have way too many rounds through these pistols to think they have a design problem.

 

[gunman9]

Ok. So I just dry fired it. Pulled the slide back very slow and the pin was still exposed. Right before the barrel closes to the slide loading a new round the seat catches the striker and resets it locking it in place with the plunger.

 

[gunman9]

Way too clean. But that's understandable since you now own a single shot pistol. (sorry, couldn't resist) This will pass, I have way to many rounds through these pistols to think they have a design problem.

Lol I know. It's just irritating cause I own a lot of smiths and have never had a problem till now! Idk what to do. I emailed smiths warranty department asking for new parts. So we will see.

 

[Bkreutz]

Lol I know. It's just irritating cause I own a lot of smiths and have never had a problem till now! Idk what to do. I emailed smiths warranty department asking for new parts. So we will see.

Do you have another M&P? If so, swap out the striker assembly. If you don't have one, maybe ask around at the range and see if you can borrow one just to make sure that is what the fix is. One suggestion, call S&W on the phone, emails are too easy to answer with "it's against our policy to send out parts, if you want warranty work, we will send you a shipping label for you to send the pistol to us." I never email them any more. And be friendly on the phone, it goes a long way.

 

[Bkreutz]

Gotta go, my reloading bench is calling my name, and my car needs washing, I'll be back in a while.