P7 PSP woes.......

misfire

misfire

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Okay, I'm at a loss here. Shot three rounds of Fiochhi 115g FMJ out of my PSP today. After the third round I went to fire my fourth round and the trigger felt like it wasn't engaging anything when I depressed it and it felt like it was chaffing/rubbing on something. Emptied the pistol and noted that the rear of firing pin was poking out of the bushing. It pushed back in easily. Placed 5 rounds into another magazine and squeeze cocked the pistol but the trigger seemed to be binding. Emptied the gun and took the magazine out and the firing pin mechanism remained engaged. The pistol cocks when squeezed but doesn't 'release' the firing pin when the trigger is squeezed or 'decocked'. Took the gun apart and didn't see anything that would indicate a problem, that is, nothing seems to be binding and there doesn't seem to be any parts that are damaged or broken and the gun is clean. I'm stumped.

Any ideas, comments or Canadian gunsmith recommendations would really be appreciated. :redface:

pspwoe.jpg
 
The only issue I've had with mine is from fouling - made worse by over lubing when I first had the pistol. Where the "sear bar" (part 24) and "drag lever" (part 35) intersect and pop together (in a round joint) can get fouled up and gummed up to the point that the sear bar can get stuck in the "down" position. If this happens, pressing the squeeze-cocker will not #### the gun, as the sear bar is staying down and not engaging the firing pin when the squeeze-cocker is pushed backward.

This problem is not serious though. It just requires a little bit of disassembly to clean it up properly. I take off the grips and push out the roll pin at the bottom of of the grip on the front side. Once that is out you just "unlock" the sear spring, and the squeeze-cocker, drag lever, and sear bar all just pop out easily. Clean it up, don't really use any oil, just wipe it with a silcone cloth or soemthing like that, and put it back together and it works great.

Unfortunately your issue sounds much more complex and potentially serious. If you are satisfied that none of the parts are damaged or missing, and you have taken the firing pin assmebly out and cleaned and it looks fine.... then this seems like a mystery that will only be sorted out with an experienced gunsmith. Joe Dlask is probably the guy. He seems to be able to figure out any problem with any pistol... usually in a few minutes (or seconds), even with stuff that has baffled me for a week or more. :redface:
 
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I just thought of something when I was re-reading your post: Fiocchi 115gr. FMJ. That stuff in the blue box with the white stripes. That stuff is absolute rubbish and I had a problem when I was using it with my PSP earlier this year as well, and I had to swear off of the stuff.

I had a problem with my PSP toward the end of a day at the range, and I can't even remember what the exact symptoms were, but I remember it involved a firing pin getting stuck. On disassembly, I take out the firing pin assembly and I find two little round flecks of metal that look like a flake of gold you might pan for in a river. I actually took some pictures of them becuase I found it so unusual. You know how that ammo has that gold/brass coloured primers? I think what it is, is that the firing pin is actually punching into that primer and pulling a little circular piece of it off and sucking it back into mechanism of the gun in some instances. There were two of them in there jamming the firing pin and preventing normal operation.

I know you said that it is not cleaning in your case, but if I were in your shoes I would definitely disassemble everything, including what I said in my previous post and the firing pin assembly, and make sure there are no foreign objects in the gun. If it still isn't going anywhere it is going to be a gunsmith issue. That Fiocchi ammo is nothing but trouble though.
 
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One for ghostie!!!!!

ghostie said:
I just thought of something when I was re-reading your post: Fiocchi 115gr. FMJ. That stuff in the blue box with the white stripes. That stuff is absolute rubbish and I had a problem when I was using it with my PSP earlier this year as well, and I had to swear off of the stuff.

I had a problem with my PSP toward the end of a day at the range, and I can't even remember what the exact symptoms were, but I remember it involved a firing pin getting stuck. On disassembly, I take out the firing pin assembly and I find two little round flecks of metal that look like a flake of gold you might pan for in a river. I actually took some pictures of them becuase I found it so unusual. You know how that ammo has that gold/brass coloured primers? I think what it is, is that the firing is actually punching into that primer and pulling a little circular piece of it off and sucking it back into mechanism of the gun in some instances. There were two of them in there jamming the firing pin and preventing normal operation.

I know you said that it is not cleaning in your case, but if I were in your shoes I would definitely disassemble everything, including what I said in my previous post and the firing pin assembly, and make sure there are no foreign objects in the gun. If it still isn't going anywhere it is going to be a gunsmith issue. That Fiocchi ammo is nothing but trouble though.
Click to expand...

ghostie, you da man!!!!! I noticed that the last piece of spent brass before the malfunction showed the primer had pierced and when I inspected the gun when I got home. I noticed a brass/gold colored bead near the firing pin hole when looking towards the muzzle. It doesn't look like it but it was perfectly round and I thought it was a pin or part of the gun. I didn't think much of it until I read your post this am and rechecked things......

IMG_0779.jpg


picture is really poor but at the five o' clock position you can see the melted primer cup....

IMG_0781.jpg


picture of the spent piece of brass and the 'pin' that I removed from the firing pin channel.....



:D THANK YOU, ghostie, THANK YOU!!!! :dancingbanana:
 
I use Fiocchi in my Glock 19 and see numerous "flecks" inside the gun when I clean it...yes the ammo is garbage....it's never affected functioning...but all it would take is for a "flect" to get stuck somewhere and it could affect functioning...my buddies PSP is the most accurate gun I've ever fired...
 
I've had that same thing happen to mine...fixed it at the range. You really need to take the tool everywhere you go.
Keep the lube down and don't use cheap ammo. I've cycled about 200 rds through mine with no problems except it really gets hot fast. Yet, still its got to be the best compact pistol out there.
 
great info Ghostie! i've never had an issue with my P7M8, but if this happens to mine, i'll know what the probable cause is.
 
Great to hear that you found the problem. Yah, I was pretty blown away to realize that those little gold flecks were getting stuck in the firing pin channel in my gun.

What total rubbish that Fiocchi is. I kind of like the snap it has, and it is cheap, but it really isn't worth the problems. I've never had anything like that with any other type of ammo.

Here's a picture of the two little flecks that were in my PSP. It's tough to get a good picture of them. They are only about the sive of the tip of the firing pin:
flecks.jpg
 
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I fired 300 rounds through mine and no problems what so ever. Except that I started firing quickly near the end and the firearm was getting very warm especially around my trigger finger.

I used Winchester 115, and Eagle 147. I actually prefer 147 grain ammo.

The only issue I found with mine is the rear sight is off. It shoots 3 inches to the left. But.. I'll be changing that soon. Otherwise an excellent pistol. I'm very happy with mine.
 
Yep... PSP works well. Like all gas delayed blowback guns, they are more work to keep clean than the Browning-style guns, but they are fun and have their advantages.

Here is a newer video of me shooting somewhat fast with the PSP:

http://www.youtube.com/watch?v=sUYciVggDDc&feature=user

One of the nice things about the gun is that it pretty much stays right on target when shooting fast.

They do heat up, especially in the summer time, and even more especially if your gun is in the sunlight. In the winter time, the cool winter air seems to more-or-less cancel out the heating up of the frame under the barrel. Even in summer, you have to shoot about 3 mags in a row to notice it getting hot though.

P.S. - when is someone going to get a few more mags for these? I missed out on Target Sports shipment of mags. What... did each German cop go on patrol with just the 8 rounds in his or her gun? Where are all the surplus mags?
 
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