Selected Handgun Detail

Glock
Model 21 Gen4
Glock Pistol 21 Gen4 .45 Auto Variant-1
Scale To:
Gun Dimensions Width:1.28-in
Length:8.23-in Height:5.47-in
Barrel:4.61-in Weight:29.3-oz
1 Variant
Gun Rankings
  • Power Factor (230 grain bullet)192050
  • Recoil Factor (230 grain bullet)8.83 ft-lb
  • Total Capacity14 rounds
  • ConcealabilityFair
  • Defense Factor88%
Gun Specifications
Type:Pistol
Caliber:.45 Auto
Action:recoil operated semi-automatic
Trigger:striker single-action (SA)
Safety:'Safe Action' trigger safety
Magazine:13-round
Frame:polymer
Grip:integrated polymer
Sights:fixed, white dot front, white square U rear
Notes:
Manufacturer
Glock Ges.m.b.H.
More Info
About the Gun

The Gen 4 series of Glock pistols were introduced in 2010. Like most new polymer framed pistols the Gen 4 series features interchangeable grip inserts. The Gen 4 series also incorporates a dual recoil spring assembly, a feature only in previous generations' compact models. Other features include a reversible magazine release, a Tenifer matte finish slide and new grip texture. Changes in the Gen 4 design are significant enough such that not all parts can be mixed and matched with previous Glock generations.

Production

Production of this specific model with the noted features began in 2010 as part of the fourth generation lineup. It continues to be manufactured today, reflecting ongoing demand for this design in the market.

Market value
Last updated: 7/10/2025

The MSRP for this gun is approximately $635. In 95% condition, the used market value ranges from $450 to $500 based on recent 2024-2025 data from various firearm marketplaces.

Cartridge Specifications
Cartridge: .45 Automatic
Alias: .45 Automatic Colt Pistol (ACP)
More Info
Ballistics for This Gun
Selected Bullet Mass:230 grains
MV:835 ft/sec ME:356 ft-lbs
Analysis

This .45 Auto pistol offers a robust design tailored for shooters seeking power and dependability. Its accuracy is commendable, delivering consistent performance at moderate ranges, while the ergonomic grip design accommodates various hand sizes with adjustable backstraps, enhancing user comfort during extended sessions. Reliability is a key asset, with a proven track record of functioning well under diverse conditions. The trigger pull, averaging around 5.5 pounds, provides a predictable break, though some may find it slightly heavy for rapid follow-up shots. Felt recoil is noticeable given the potent caliber, but it remains manageable for experienced users. On the downside, maintenance can be somewhat demanding, requiring regular attention to ensure optimal performance. Additionally, sourcing certain replacement parts may pose challenges in some regions. Overall, this firearm suits those prioritizing durability and stopping power, though it may not be ideal for novices due to its recoil and upkeep needs.

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