Glock 21 slide on Glock 20

[ReverendOlaf]

I picked up a complete Glock 21 slide on Gunbroker, and I'm hoping to shoot .45acp through my Glock 20 SF (or what will be a bit of a Frankenglock at that point).  I also have a couple G21 mags coming (picked a bad time to do this), and I think that's all I need.

Anyone try this?  I'll still shoot 10mm, and maybe get a .40 S&W conversion barrel to use with the G20 slide.  I'm learning options help me keep my G20 fed with bullets without shooting huge holes in my wallet!

[Yondering]

It'll work fine! The frames are the same between the 20 and 21, so it really won't be a Frankenglock.

Good job on picking up that extra slide. You might find, like I did, that the G21 has exceptionally good accuracy.

[BlueLineFish]

I will be picking up a g20 shortly. Going to try to find a 21 slide

[ReverendOlaf]

Got the complete G21 slide and 2x 26 round G21 mags (oddly easier to find quickly at a good price) to go with the 2x 13 round ones that have yet to ship.  Yet to take to the range, but it should work well. 

@BlueLineFish, if you want 10mm and .45 ACP (and not .40S&W, .357 SIG, etc...), just getting a G21 and a 10mm conversion barrel will be cheaper.  Since I plan on shooting .40S&W via a barrel swap on the G20 slide, it seemed like a better plan for me. 

[Grizzz]

Can a g21 mag be modified to 10mm?

[Turo]

Can a g21 mag be modified to 10mm?

Not without redesigning the entire mag and changing out a bunch of parts.

Luckily, a G21 mag fits perfectly in a G20 frame, so there's no reason to convert magazines.

[BlueLineFish]

with this 20 i plan on shooting 10,40,357 sig,45 and 50 gi