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its a standard Glock G20
Hi Toby, It's the standard Glock 20 dimension frame.
Toby, This is not listed as a SF model, but this is what I can share with you. I have then Gen 3 G20 SF and a Gen 4 G20. No extra backstraps with the Gen 3 and the extra backstraps with the Gen 4. When I put smallest Gen 4 backstrap on the Gen 4 G20 it is the same as the Gen 3 G20SF grip. Trust me. So if this Gen 4 G40 has the 3 extra backstraps the smallest one should be close to a SF non interchangeable backstrap Gen3 G40. I do not even think they make or call any of the Gen 4 10 mm models SF any longer because of the interchangeable backstraps. Think that stopped with Gen 3 models with no extra backstraps.
