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Discussion in 'General Glocking' started by Nooncope, Mar 15, 2012.
Is there a conversion barrel that converts a Glock 21 to spit out 9mm?
no, but if you make one, I bet it would be a game changer.
I read here somewhere that the Glock 20 can shoot:
10mm (of course)
all with a swap of a barrel.
Then I saw here that the stock 10mm barrel can be used in a Glock 21 but the stock .45acp barrel cannot be used in a Glock 20.
Any of this true?
yes on 40, 357 sig, 9x25 Dillon. Looks like no on 9x19.
I don't know about the .45 conversion.
There would have to be a proprietary magazine for a G21 9mm conversion even if a barrel existed.
The above is true.
While it's true that a stock G20 10mm barrel will function in the G21 slide (or G29 barrel in G30 slide), it is not the best option. The fit in most dimensions is good, except the stock 10mm barrel chamber hood is narrower than the 45ACP by slightly over .050" and the chamber to breechface interface is undersized. An aftermarket 45-10mm conversion barrel makes the adjustment, plus it has better chamber support and is suitable for shooting non-jacketed, hard cast lead bullets.
The caliber/ammo conversions commonly available for the Glock 21 and 30 45ACP pistols include:
A more complicated (and expensive) conversion of the G21 to .50 GI is possible with a full upper and mag swap.
Thank you everyone for your responces.
The case head of the .45 ACP is just too large compared to the 9MM.
The reason the 40-9 conversion barrels work is because the difference between them is small enough the .40 extractor can still effectively reach the 9MM rim. The .45 extractor just doesn't have enough reach to get to the 9MM.