I have a 21SF and really feel it’s more than adequate, both on my hip at work and on the nightstand but I’ll admit I’ve been intrigued with that conversion kit ever since they were introduced.
It’s well done and as ya state not a “need” .....just wanted one. The “conversion” for the Glock fits either my 21 or 20. Well made and fun.
Its a great BBQ gun....:o)
Stay safe !
I converted my 21c to .460 Rowland. I had no other use for it since I carry a Glock 29 10mm anyways. It’s a beast. I posted some velocity/energy data in this thread if you care to check it out. I love the Glock 21 in .45 acp and have gone through about 4 of them. It was hard for me to tamper with perfection. If it was my only handgun, I wouldn’t have done it... but it wasn’t. expansion of a 230 grain JHP at around 1200-1300 fps is pretty incredible. penetration is extreme also. The .45 super conversion is pretty awesome too. It doesn’t require anything more than a new recoil spring and guide rod and you will be making a lot more energy than .45 acp and your Glock 21 will take it like a champ since it was originally designed around the 10mm automatic cartridge which operates at a significantly higher pressure than the .45 super.