Picked up a 21SF this afternoon. I had the option of the ambi-safety/Picatinny rail, or the RH Safety/Glock Rail, and went with the latter.
That being said, I’m trying to determine holster compatibility. To the best of my knowledge, there isn’t a difference between the 21 and the 21SF that I picked up, other than the grip. Common sense leads me to believe that since I opted for the Glock-Railed version, I should be able to use any standard 21 holster.
Currently, I’m eyeballing a Blade-Tech holster for the G21 and X300.
I’ve been on the fence about it for almost six months, and finally sucked it up and got it.
That’s a breath of fresh air on the holster situation. It looks as though Blade-Tech offers every possible configuration of light+weapon that I’m interested in for the 21.
Your G21SF w/ Glock rail will fit any G21 FG/R holster.
If your holster was molded for a non-FG/R frame, you may have fit issues. This will be more an issue with leather than kydex, but watch the kydex that are formed with more detail.