I predict that move would really blow up in their face. That really bombed in focus group testing; no sense fragmenting their product line.
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They were making these for the Austrian and other NATO military before they came out with their pistol.
In other words they were a great company before they were gun company.
The grenade has a polymer body with steel ball bearings mixed into the explosive material providing the frag.
And for Portland PB at least, the Glock 21.
Every time this happens, I get a little hopey that we'll see a Glock 19 sized .22, or a Glock 9mm PCC, but it's probably gonna be like Lucy promising Charlie Brown she'll let him kick the football for real next time.
They had enough humor to make the Glock 45 a 9mm. I think that making the Glock 44 a .22LR would be pretty cute. However, I don't think it'll happen because it's harder to achieve very high reliability with rimfires. I could see Glock worrying that a bad bucket of bulk .22 would tarnish Perfection.