Grand Power P40 10mm -- meh.

[Ten2six]

When I ordered my new spring, the red one was the only one shown for the 10mm.

[Big10]

There are two red springs listed on Eagle Imports, one listed as 'GP36-K100' and the other listed as 'GP36-P40'. GP36-P40  was the only recoil spring listed under P40 parts.  There is no "silver spring" listed at on the Eagle Imports web site, nor was there a 'P40L' parts section.

https://grandpower.eagleimportsinc.com/grandpower/shop/parts/p40-parts/recoil-spring

[Big10]

What is the difference in recoil if you have shot it yet?

Haven't shot it with the red spring.  However, manual racking of the slide seems to have the same resistance.  The biggest problem with the silver spring is that it is so long it kinks when trying to thread it onto the guide rod, very difficult with only two hands.  The red spring, being shorter, doesn't have the opportunity to kink before getting thread on the guide rod.

I'm sending the gun in for warranty repair to Alhmann's in MN.  I spoke with a smith there who said he's had to fix several with the mag drop issue.  In each case he said he had to increase the magazine catch's engagement with the mag body.  He's estimating a 2 week turnaround.

When it gets back, I'm putting on another extended thumb safety from the X-Calibur model.  It'll need some reshaping, but it's got a lot of material to work given its boat oar shape.... it's freaking huge.

[10Tens]

This gun is junk! Plain and simple. I've had mine back after warranty work. Still mag drop issues with real full house loads. With pussy 40 Smith loads it seems to stay engaged. I didn't buy a 10mm to shoot pussy loads. Trying to reassemble the gun is ridiculous! One needs 4 hands! The recoil spring is to damn long! Mine will be on gunbroker soon. Good luck to all who own one.

[Patriot]

My friend I mentioned earlier won't even sell his. It's so bad he doesn't want to risk giving it to someone else. He's asking Grand Power for a refund, and wants them to recall ALL of them. We'll see what they say.

[PCFlorida]

That is a shame, they must have changed something in the manufacturing process. Mine has been flawless for the last 1K rounds.

[10Tens]

Ok. Try shooting your guns with full house "real" 10mm loads. It will fail! You don't just have the one miracle gun. Sorry. If I shoot pussy target loads it works most of the time. This is after having 3 new mags reworked and a few other gunsmithing tricks. It's not a reliable gun period. There needs to be a class action lawsuit, to force a recall!

[PCFlorida]

Please don't make assumptions. I only shoot full house loads, and I am not the only person here that owns a P40 with no problems. We purchased ours last year in the fall. I have some threads about some of my loads if you take the time to look for them. That being said, I hope it is repaired/replaced or refunded to your satisfaction.

[Intercooler]

I'm trying to wrap my head around these magazine drops. Unless something is really way out of whack, anything can be remedied (unless it's user induced) and that's procedure.

Can someone with a "dropsy" pistol do this? Take the entire top off, strip the magazine inner parts out and snap one in. Take a photo of the mag catch engagement for us. Can someone with a "no-dropsy" unit do the same? I will try it on my K100 9mm and take a picture of that also. It's never dropped a magazine...

[PCFlorida]

Sure, I just took a picture and will be uploading it shortly. You can clearly see the magazine engagement.

[PCFlorida]

[Intercooler]

Great! How is the slop around the detent? I'm wondering if the opening on the problem magazines isn't large enough. It looks like enough meat is protruding in the magazine to keep it in place. If too much goes in it will hang the follower.
I guess we still have two questionable areas. Is the base plate not allowing the magazine enough travel to fully seat? Some of the Witness base plates had to be sanded slightly on the top surface facing the magwell bottom to remedy that. If the magazine well has too much slop front:rear, the engagement might not be enough to hold the detent as another issue. With it clipped in like the picture you can rock and tug on it while you watch. It shouldn't come out under any circumstance!

[Intercooler]

I worked your image a little. Hope you don't mind 

[PCFlorida]

The slop left to right is very minimal, and the magazine will not come out without the release being pressed. The piece of metal in the back of the magazine on the right side keeps the magazine from having any slop front and back. There is almost zero slop in any direction.

[Intercooler]

I will get a picture of mine here in a second. I'm just curious if my detent protrudes deeper into the magazine than yours. Like I said... never dropped one at all!