Built originally as a U.S. Customs and Border Protection contract pistol, the Glock G47 Gen5 MOS pairs a full-length 4.49" G17 slide with a slimmer G19-width polymer frame. The result is a 17+1 round duty pistol that carries the same sight radius and barrel length as the Glock G17 Gen5 MOS but rides on a frame closer in width to the G19. Glock released it to the civilian market after CBP adoption, and the appeal is straightforward: full-size slide ballistics on a more concealable grip footprint.

The MOS optic cut accepts the Glock MOS plate system for Trijicon RMR, Holosun 507, and similar footprints. At 25.93 oz empty and 17+1 capacity, the G47 keeps the same duty footprint as the G17 while opening up the cross-compatible slide-and-frame architecture. G47 slides fit G19 frames and vice versa, which expanded an already enormous Glock parts ecosystem. The Glock G45 Gen5 MOS attempts a similar long-slide-short-frame formula at compact dimensions, but the G47 keeps the full G17 footprint up top.

Compared to the G17 Gen5 MOS, the G47 is essentially the same gun with a different grip frame number stamped on it — federal contract origin and slightly different texturing are the only meaningful changes. Pick the G47 if you want the long-slide ballistics and either prefer the slimmer G19-family grip, or want a duty-grade pistol with the CBP contract pedigree. Pick the G17 MOS if grip footprint doesn't matter and you want the more common parts inventory.