Reliability Update: 8500 rounds (update)

Just wondering why you would abuse a rifle like that. What are you trying to prove ? What are your groups like ? 25" at 10' !!! Please explain what your trying to show us.
 
Mike, would you relate the broken firing pin to the lack of cleaning? I've just not heard of a broken firing pin in an M&P15-22.

I highly doubt the cleaning had anything to do with the failure. This rifle has been strickly used for full-auto fire since I have had it. Out of the ~8,500 rounds that have been through it, I would guess only 75 have been single-shot. The rest have been at a 750 rounds per minute fire rate.

Being that this gun wasn't made for full auto, I am sure the heat and friction of the firing pin finally gave out.

Plumbago said:
Very strange failure!!............Plum

I am sure it developed as a stress crack and finally went during the rapid firing. You can see it just split off from the pictures.

Ammo dog2311 said:
Just wondering why you would abuse a rifle like that. What are you trying to prove ? What are your groups like ? 25" at 10' !!! Please explain what your trying to show us.

I don't believe I am abusing the gun by a lack of cleaning, for the FrogLube keeps the gun oiled throughout operation. Although I haven't cleaned it, it is very well lubed in the necessary spots. After each firing, you can see the wet oil. In addition, I have compared the BCG to others with less than 1/2 the amount of shots and mine looks almost new in comparison.

What is the point of not cleaning it? Just to see when it would fail to feed or stove pipe. It is nice to know what durability the rifle has. I have had plenty of guns that seem to lose accuracy, fail to operate, etc. after 500 rounds. For a plinker, which is what this gun is, I wanted to know if I had to take care of it like my 10x more expensive rifles or not.

While I stated that I do not believe there is abuse from cleaning, I do believe the full-auto firing of nearly 8400 rounds has taken its toll; hence the broken firing pin. Yet, the rest of the gun is great condition.

Accuracy? Ha! Once I get the new firing pin back, I will do some tests for you. After every ~500 rounds or so, I shoot a nice 1" grouping at 25 yards (maximum indoor range). I haven't lost any accuracy thus far that I can tell at this range.

Mike
 
Great torture test!! Guys like you make it easy for us to pick a weapon like the 15-22 vs. other plinkers.

Looking forward to the accuracy test!
 
Very nice write-up. Before I bought my 15-22, I was renting one at my local range. It looked just as dirty as yours, and not once did I have an issue any times I rented it. I have personally put over 1300 rounds through it in two weeks time, and have not seen any evidence of cleaning.

Hard to tell by these pics, but nearly every surface is well goated with powder/dust/grime, etc.

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Iv heard that frog lube is really good stuff !!!! With that being said. Just a few quick questions???? How do you heat your part Heatgun??? And like the look of your gun case. What brand is that???

Thax :)
 
I don't have a heatgun here so I'm planning on borrowing a hair dryer.
 
I guess I won't loan you my corvette to test drive, for sure..
Looks to be the breaking point for the M&P firing pin is about 8500 rounds. I am amazed how long it still preformed when dirty as you got it. The powder builds up and causes lite primer strikes, but at 8500 that's great. Thanks for the Torture test on the M&P, it's a great rifle and now I can tell others your torture test just proved how good it is. Thanks
 
I guess I won't loan you my corvette to test drive, for sure..
Looks to be the breaking point for the M&P firing pin is about 8500 rounds. I am amazed how long it still preformed when dirty as you got it. The powder builds up and causes lite primer strikes, but at 8500 that's great. Thanks for the Torture test on the M&P, it's a great rifle and now I can tell others your torture test just proved how good it is. Thanks

Ace-

No worries on the Corvette; as you could gather from my name, I have had my own:

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I just got the new firing pin on Saturday. I took it to the range after installing it; everything functions fine. Sent another 666 rounds (shot two boxes of Winchester 333) with the slidefire. I would also go to say, that I believe the firing pin would have lasted much longer (2-3x as much) if shot with just a quick finger or general target shooting. Shooting 700+ rounds per minute really takes a toll on the parts, although - I am very impressed with the durability thus far.

Then, on a whim, I purchased a Saiga 12 with some goodies. This week I should have it all here and pumping some slugs down range. :)

Mike
 
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I've got some respect for a guy who puts that much ammo down range.

*claps*
 
Ace-

No worries on the Corvette; as you could gather from my name, I have had my own:

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I just got the new firing pin on Saturday. I took it to the range after installing it; everything functions fine. Sent another 666 rounds (shot two boxes of Winchester 333) with the slidefire. I would also go to say, that I believe the firing pin would have lasted much longer (2-3x as much) if shot with just a quick finger or general target shooting. Shooting 700+ rounds per minute really takes a toll on the parts, although - I am very impressed with the durability thus far.

Then, on a whim, I purchased a Saiga 12 with some goodies. This week I should have it all here and pumping some slugs down range. :)

Mike

That Vette is sick! Oh and enjoy the s12. Do you plan on putting a slidefire on that? That would be ALOT of fun, but a sore shoulder for sure. I get a sore shoulder after doing mag dumps with my S12 in Semi-auto.
 
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