I use a Safariland 014 holster for my Open Glock 17 and I do realize that it will not protect my optic, which causes me to be a bit more careful about potentially running into things. Whereas with my limited gun and Safariland ALS, I do not care if something hits my gun/holster. This mainly applies to 3 gun competitions for me, since most of the pistol competitions I participate in, the gun spends little time in the holster.