I've never fired the GAP .45 round. My Glock is a .45 ACP. The newer Glocks (37, 38, 39) are all .45 GAP. What is the difference? I know the GAP is a miniaturized version of the ACP. Performance and self defence wise is there a difference?
Just MHO, the tiny bit of difference in pistol size that the GAP facilitates isn't worth the extra hassle. YMMV.
The idea was to make a smaller grip circumference for the Glock pistols...then they came out with the 21SF. I'd much rather have a 21 SF than a 3? in GAP. Talk about hard to find ammo, expensive, and just silly IMO
it will exist as long as Glock makes pistols in that calibre. it will probably become a bit harder to find on shelves in the future.