Grand Power P40 10mm -- meh.

[PCFlorida]

Mine dropped the mag once or twice during the first or second shooting, and then never again. I think there was a burr that wore off.

[Intercooler]

Here is mine with the magazine inserted. The detent is tapered to allow magazines to easily insert and catch at the top of it. To the left you can see the metal tab that limits travel of the magazine upwards... everyone's looks like that and that rounded tab not bent down limiting upwards travel? It looks like my detent sits flush with the inside of the magazine when clipped in. The left:right slop in the magazine cut-out looks like more than 1/16" where you see the opening to the left.

[Intercooler]

Their is a metal tab at the rear of the magazine that swings on the cross-pin to limit rear travel. It appears red in this picture. Does everyone have it and anyone with a bent piece?

[Intercooler]

Another shot of that travel limiter on the left. If I wasn't getting a solid full seat I would be looking to possible tweak that upwards slightly.

[Intercooler]

Here is a better picture of the detent that retains your magazines. Does everyone's black spring behind it look like mine?

[PCFlorida]

Basically the same setup, you may have more detent protrusion than I do, however mine is enough.

[Intercooler]

Close-up of the magazine limit with nothing inserted.

[Intercooler]

Basically the same setup, you may have more detent protrusion than I do, however mine is enough.

It looks like your magazine opening might be a little tighter side to side. Can you measure that window? Mine looks to have more slop there and I will measure it.

[Intercooler]

Here is that back piece that floats on the pin up against the magazine.

[Intercooler]

Here is my follower. If you are having a problem getting all 14 rounds in the magazine take a look at the knub in the center to see if it needs shortened some.

[PCFlorida]

Here is my follower. If you are having a problem getting all 14 rounds in the magazine take a look at the knub in the center to see if it needs shortened some.

I typically only load 13 as I have to use my UPLULA to load 14, it is that tight. That being said I may look at the follower.

[PCFlorida]

Basically the same setup, you may have more detent protrusion than I do, however mine is enough.

It looks like your magazine opening might be a little tighter side to side. Can you measure that window? Mine looks to have more slop there and I will measure it.

.157 wide and .199 tall according to my reasonably accurate digital caliper.

[PCFlorida]

Here is my follower. If you are having a problem getting all 14 rounds in the magazine take a look at the knub in the center to see if it needs shortened some.

The 10mm uses a different follower, here is one of mine.

[Intercooler]

Basically the same setup, you may have more detent protrusion than I do, however mine is enough.

It looks like your magazine opening might be a little tighter side to side. Can you measure that window? Mine looks to have more slop there and I will measure it.

.157 wide and .199 tall according to my reasonably accurate digital caliper.

.168" x .236" for all of mine here. You know GP didn't have magazines for a while. Could it have been a quality issue from the supplier and some of these need hit a little with a half-bastard file?

Now I want to measure the detent to get a rough ballpark of it's size. It needs a little slop IMO...

[Intercooler]

That little knub "could" still create a problem when totally full. You would almost need some colored grease like used for gear installs to see what the print looks like.