I had a Ruger P89 and a PC9 (which used the same mags) that were stolen. If they weren't, however, I probably never would have discovered the wonderful world of the 10mm and the Glock 20. But I love the 20, and want to convert a carbine to shoot the 10mm and use the Glock mag...Wishful thinking I know, but this is what I've come up with so far, and would like some input... 1. Kriss carbine- likely candidate since it uses a glock 21 mag....$1700 plus the cost of converting, never held one so I don't know if it can even be done... 2. Oly 10mm upper- around $750, but the glock mag is a smidgen too wide to fit in my AR lower, could maybe mill out two slots and make a two piece mag block....would take a lot of engineering for mag release, etc..the upper uses a straight mag and the Glock mag is angled, so not sure about feed issues..... 3. AK platform- can be engineered to shoot just about anything....could probably build one up with spare parts I have lying around, would just need a custom barrel built and fab a mag well... the 7.62 bolt head will hold a 10mm loosely, a 5.56 bolt head could probably be opened up a little to work... definately worth looking into.... 4. Hi-Point .40- rechambering the barrel would be easy, but don't know if action could handle the 10mm......uses single stack mags, the plastic pistol grip could be easily machined out for the Glock mag, but I'm not sure if the reciever could be modified for it...would be the cheapest way to go for sure if it could be safely done... 5. Ruger PC4- These things are built like a tank, I'm sure it could handle 10mm with spring changes and maybe more mass on the auxilary weight that is in the forestock. Since they use Ruger P-series double stack mags, modifying the magwell should be easy.... The PC-4 is the most likely candidate, and is what I will pursue unless anyone has a better idea... Wanna kill these ads? We can help!