Springer P07/P09 140mm base plates, but which magazine?

[Django_Speedwagon]

I’m debating buying a P10c or P07 soonish for carry but I’d like to run it in USPSA limited for fun/practice.

 

i found these extended base plates from Springer for p07/P09 magazines but their product page doesn’t say which magazine they are for.  I assume the 17 round p09 magazine?

 

https://shop.springerprecision.com/product.sc?productId=381&categoryId=95

 

Will that mag extension and a p09 17 round mag work in a p07 or P10c?

[Fishbreath]

All P-09 magazines will fit in a P-07. Newer P-07 and P-09 magazines will fit in a P-10C. Some old ones won't, although I don't know how common the old ones are anymore. I wouldn't expect the extensions to change how a P-09 magazine fits in one of the other guns. I don't have any experience with the Springer ones (I'm using the CZ Custom extensions on my Limited P-09), but I can't imagine they'd interfere with anything if you're using P-09 magazines.

[Django_Speedwagon]

I found that the spring kits that come with them can be trimmed in case I put them in a smaller magazine which was my actual concern.

 

i probably didn’t make that clear sorry.