Trijicon rmr glock mos mounting kit
FEATURES-Fits G17 Gen4 MOS, G19 Gen4 MOS, G34 Gen4 MOS, G35 Gen4 MOS, G40 Gen 4 MOS & G41 Gen4 MOS-RMR Not Included-NOTE: One must have this kit to mount an RMR on a MOS slide. RMRs ship with two long screws whichwill NOT work. You will need the two short screws in this kit.
Dimension: 2.15 X 3.00 X 5.45