The tip of the striker broke off recently. Its an M&P 9mm. At that point it had exactly 900 rounds of 124gr standard pressure factory loaded ammo through it. I was doing some dry-fire practice at the time. S&W had me send it in and paid for shipping both ways. Pistol was returned in two weeks. No problems after 400 rounds. Anyone else had the tip break off the striker?
Broken Striker
1 - 20 of 146 Posts
I had the striker break where the spring cups lock against the front of the striker. About 2000 rounds of dryfire to do so.
No modern gun should do that with that little dryfire IMO. Smith didn't seem to think so either when I asked them about dry-firing and stick with their FAQ answer that all their guns are safe to dry-fire.
Mine was a .40.
No modern gun should do that with that little dryfire IMO. Smith didn't seem to think so either when I asked them about dry-firing and stick with their FAQ answer that all their guns are safe to dry-fire.
Mine was a .40.
Joined
·
1,481 Posts
Raz-0,
those are second generation strikers not sigma strikers. You must be used to looking at one of the 1gen strikers that don't have that extra pad on the sear engagement face. The 2ng gen have been around since about half way through the MPBXXXX's.
those are second generation strikers not sigma strikers. You must be used to looking at one of the 1gen strikers that don't have that extra pad on the sear engagement face. The 2ng gen have been around since about half way through the MPBXXXX's.
Interesting. I have an MPB6-something.
the first one definitely looks like a sigma with the slab sided front end and the plastic sleeve that covers three sides rather than just two.
Now that you mention it, the last picture has the bit for the firing pin block on it, which the sigma doesn't.
So do the new style strikers accomplish anything with the change, and do they fit into guns using the previous revision?
Do they result in a harder primer strike maybe?
the first one definitely looks like a sigma with the slab sided front end and the plastic sleeve that covers three sides rather than just two.
Now that you mention it, the last picture has the bit for the firing pin block on it, which the sigma doesn't.
So do the new style strikers accomplish anything with the change, and do they fit into guns using the previous revision?
Do they result in a harder primer strike maybe?
Joined
·
1,481 Posts
I am not sure when exactly they made the change I do know that I have seen MPBXXXX's with both generations.
I believe that it was purely to get a little more spring pressure for harder primer strikes. They also changed the front step where the 2-piece collar sits putting a bit more radius on the inside step likely to reduce a stress point.
I believe that it was purely to get a little more spring pressure for harder primer strikes. They also changed the front step where the 2-piece collar sits putting a bit more radius on the inside step likely to reduce a stress point.
Wow, one thread with 3 totally different firing pin/striker failure descriptions.
Are these parts cast, MIM, machined from barstock?
I'm betting against machined from barstock, due to cost. If I had to guess I'd say MIM from the pictures. MIM can produce good parts. Parts not holding up points to a process issue and obviously a QA/QC issue if they are making it into shipping guns.
Are these parts cast, MIM, machined from barstock?
I'm betting against machined from barstock, due to cost. If I had to guess I'd say MIM from the pictures. MIM can produce good parts. Parts not holding up points to a process issue and obviously a QA/QC issue if they are making it into shipping guns.
vzontini said:
It's machined, and a roughly i might add. I spoke with a tech at S&W today, there is a newer revision of the part. I didn't bother to ask for specifics, i'll post a picture of the new one when it gets here. IMO the CNC programing for the part was what was causing the problem, the machining process can create huge metal fatigue producing failures like the one I had. If this part were machined from 4140 CroMo or 416 stainless the parts may have been fine, but our M&P strikers are some sort of tool steel that is not a free machining steel and that makes all the difference in the world. I'm sure S&W will work it out.
BTW
The Tech I spoke with today mentioned getting to try an M&P out last wekend, he seemed really impressed with the work on action performed by Dan Burwell.
DanGTG said:
It's machined, and a roughly i might add. I spoke with a tech at S&W today, there is a newer revision of the part. I didn't bother to ask for specifics, i'll post a picture of the new one when it gets here. IMO the CNC programing for the part was what was causing the problem, the machining process can create huge metal fatigue producing failures like the one I had. If this part were machined from 4140 CroMo or 416 stainless the parts may have been fine, but our M&P strikers are some sort of tool steel that is not a free machining steel and that makes all the difference in the world. I'm sure S&W will work it out.
BTW
The Tech I spoke with today mentioned getting to try an M&P out last wekend, he seemed really impressed with the work on action performed by Dan Burwell.[/quote]
UPDATE
I received the striker a few days agao and think i misunderstood the Tech and that the part is the same as the one that came with the gun, He mentioned that it would be marked with a 9, it came in a plastic bag marked 9mm. :roll:
just want to un-confuse the situation
Dan
K said:
It looks better, smoother, not different dimensionally. I can't say for sure if there is a change in the way it is machined, but the marks from the process are smoother. The likely answer is the one that broke was machined with a dulled cutting tool. By the time the Boys break them in enough to smoothen out the trigger this sort of thing will show it self, I doubt you'll have any trouble.
How many M&P's did Clearwater buy?
Be safe
Dan
1 - 20 of 146 Posts
