Heh, a lot of my pistols exchange parts...especially mags
My Star collection backs each other up...most switch parts and mags.
Star 40 (40-S&W) & 43 (9mm) literally were made to use each other's mags.
They're one of the very few that ever got that right!
On top of that, Star's 243, 28, 30, & 31 all use S&W 5900 series mags!
Star 240 uses S&W 4000 series mags...
S&W CS40 & CS45 exchange parts, but not mags...
however, the Star M45 uses CS45 mags, and Vise-versa.
Hi Standard Model B uses Colt Woodsman (1st Gen) mags & many parts can be Hand-fitted to exchange.
AND!!! The Marlin Camp 922M uses Marlin 25M, 925M, and XT22M mags...if you drill the mag catch hole for the 922M in the mag.
All top hat bolt-action .22 Marlins exchange parts...
same for the Magnums...all top hat bolts form the 780 to the XT22M exchange parts.