Description Glock 17 9mm 33 Round Magazine MF17033 is the full size 9mm magazine. This combat-ready mag has the same steel and polymer construction as the compact size model. These 33 round capacity magazines are factory made for Gen 3, 4, & 5 Glock 17 (MF17033) and Glock 34 (MF17133) pistols. The Glock 17 9mm 33 round magazines have a flush fitting Glock baseplate and numbered witness holes for identifying capacity.