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Standard | .45 AUTO
Remarkable for its accuracy and light recoil, the GLOCK 21 Gen4 delivers the power of the 45 Auto round with high magazine capacity. The Modular Back Strap system makes it possible to instantly customize its grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters The Gen4 system is the perfect complement to the 45 Auto caliber cartridge.
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  1. Length (Overall)**
    205 mm | 8.07 inch
  2. Slide Length
    193 mm | 7.60 inch
  3. Width (Overall)
    34 mm | 1.34 inch
  4. Slide Width
    28,5 mm | 1.12 inch
  5. Height incl.Mag.
    140 mm | 5.51 inch
  6. Line of Sight (Polymer)
    172 mm | 6.77 inch
    Line of Sight (Steel)
    171 mm | 6.73 inch
    Line of Sight (GNS)
    170 mm | 6.69 inch
  7. Trigger Distance**
    72,5 mm | 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.

  • Caliber
    .45 AUTO
  • System
    Safe action
  • Mag. Capacity
  • Barrel Length
    117 mm | 4.61 inch
  • Weight
    without magazine
    745 g | 26.28 oz
  • Weight
    with empty magazine
    830 g | 29.28 oz
  • Weight
    with loaded magazine*
    1100 g | 38.80 oz
  • Trigger Pull**
    28 N

    The size of ammunition the pistol takes.


    The safety mechanism used.

    Magazine Capacity

    How many bullets a standard / extended magazine can hold.

    Barrel Length

    Measured from the front of the barrel to the front of the slide.

    Weight Without Magazine

    The weight of the pistol without a magazine in place.

    Weight (Empty)

    The weight of the pistol with an empty magazine in place.

    Weight (Fully Loaded)

    The total weight of the pistol with a full magazine in place.

    Trigger Pull

    The amount of force needed to pull the trigger.

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