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HANDGUNMid-Range

Glock

Glock 45 Gen5 MOS

Gen5 crossover Glock with G19-length slide, G17-size grip, and factory MOS optic cut

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Key Highlights

  • G19 slide on full-size grip
  • Factory MOS optic cut
  • Gen5 trigger and controls

Specifications

Price
$669
Weight
1 lb 8.52 oz
Calibers
9mm
Rail Type
picatinny

Capability Profile

0-10 Scale Across 8 Axes

Compatibility Tags

family: handgunframe: glock-gen5frame: glock-compactmag-type: glockinterface: picatinny-pistoloptic-mount: rmroptic-mount: dpp

Overview

The Glock 45 Gen5 MOS is Glock's black crossover service pistol: a compact G19-length slide and 4.02-inch barrel on a full-size G17-height grip. That layout gives the shooter a full 17-round firing grip while keeping the slide shorter and faster out of the holster than a G17.

The MOS version adds Glock's Modular Optic System for common red dot footprints while retaining Gen5 parts fitment. For upgrade shopping, the important split is simple: buy G19-length slide and barrel parts, but use Gen5 Glock trigger parts, full-size Glock magazines, duty pistol lights, and MOS-compatible optics. It is not a Gen6 host, so Gen6-specific barrels and trigger parts should stay out of this build path.

Key Features

  • G19-length slide with 4.02-inch Glock Marksman Barrel
  • Full-size 17-round grip frame
  • Factory MOS optic cut with adapter plate support
  • Gen5 nDLC finish and front slide serrations
  • Ambidextrous slide stop lever
  • Reversible magazine catch
  • Flared Gen5 magazine well
  • Accepts standard Glock 17 magazines

Pros

  • +Full-size grip with shorter G19 slide handling
  • +Factory optic-ready without aftermarket milling
  • +Gen5 aftermarket support is deep and mature
  • +Excellent duty, home-defense, and Carry Optics host

Cons

  • Full-size grip is harder to conceal than a Glock 19
  • MOS plates add height versus direct milling
  • Crossover fitment means slide/barrel parts must be G19 length, not G17 length

Detailed Specifications

caliber
9mm
Barrel Length
4.02 inches
Overall Length
7.44 inches
weight
24.52 oz with empty magazine
trigger
Safe Action, 26 N pull
barrel
Glock Marksman Barrel, nDLC finish
msrp
$669

Compatible Components

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