GTUL - What does GTUL stand for? The Free Dictionary
References in periodicals archive
(www.mygtul.com), for instance, offers an inexpensive Glock magazine cleaning kit, and their new gadget is the STUL, a slide-removal tool.
For some time after I got a GTUL
Glock Magazine Cleaning Kit, I used it for its stated purpose: easy disassembly and thorough cleaning of my Glock mags, and it did a heck of a job.
allows you to secure the magazine with one hand and apply pressure to disengage the locking tabs.