Greek company Barrel Advanced Armament recently posted the above photo of the Glock 17 MOS on their Facebook page, stating that the featured pistols were procured for a “special user”. The Glocks are equipped with a Docter RDS, unidentified suppressor, and in the case of the bottom pistol, a Streamlight TLR-1 HL weapon light. A source who wished to remain anonymous stated that the pistols are intended for a special unit that cooperates with US Federal Agencies, but gave no further details.