Gen5 MOS
Standard | .45 Auto

GLOCK 21 Gen5

With the new addition of the .45 AUTO in the Gen5 lineup, the G21 Gen5 MOS delivers improved accuracy, light recoil, and now has the option to install an optic. All of the Gen5 qualities are present in this compact-size pistol: The latest GLOCK nDLC surface finish, unmatched in hardness and rust resistance; the high traction Gen5 frame texture, quickly reversible magazine catch, ambidextrous slide stop lever, the GLOCK Modular Backstrap System (MBS) for individual operator adjustability, the universally-acclaimed GLOCK Safe Action® System and high visibility orange magazine followers.


.45 Auto


Safe Action®

Mag. Capacity

Standard: 13

Optional: 10

Barrel Length

117 mm I 4.61 inch


without magazine

735 g I 25.93 oz


with empty magazine

825 g I 29.10 oz


with loaded magazine

1095 g I 38.62 oz

Trigger Pull

26 N

1 Length (Overall)** 205 mm I 8.07 inch
2 Slide Length 191 mm I 7.52 inch
3 Width (Overall) 35 mm I 1.38 inch
4 Slide Width 28,5 mm I 1.12 inch
5 Height incl.Mag. 140 mm I 5.51 inch
6 Line of Sight (Polymer) 176 mm I 6.93 inch
Line of Sight (Steel) 175 mm I 6.89 inch
Line of Sight (GNS) 174 mm I 6.85 inch
7 Trigger Distance** 72,5 mm I 2.85 inch
*FOR GEN4/GEN5 MODELS: Check out the Gen5 and Gen4 Technology area for medium/large backstraps. 

Technical Data are rounded and do not reflect tolerances – they may be altered without notice! Subject to technical changes.
Lockable pistol case


Buy custom GLOCK accessories and more on the Team GLOCK Store. 
GLOCK MOS Adapterset 01

Gun Parts

Shop the Team GLOCK Store for Gun Parts. 
GLOCK T-Shirt grey


Find the best clothing and apparel for all seasons.
Montage Outdoor

Gifts & Collectibles

Buy the best GLOCK gifts and collectibles for your office, outdoors, and range.