Looking at one of the kydex holsters from Armordillo Concealment. Can be used for both IWB/OWB, and you can get a complete rig (holster, double mag carrier, C-clips and hardware) for $105.
The fact that it's a Gen4 shouldn't affect the holster...you can always call and ask before ordering, or order a holster for a G21SF.
GSSF & NRA Member
Si Vis Pacem, Para Bellum ~ Μολών Λaβέ
Last edited by Ranger45; 05-09-2012 at 19:03..