SF = "Short Frame"
The short frame was originally designed to compete in the U.S. military Joint Combat Pistol trials for a new .45 ACP pistol to replace the M9 pistol.
This was achieved by a reduction in trigger reach and a reduction in heel depth.
The Glock 21 and Glock 21SF are both .45 ACP pistols, but the primary difference lies in their dimensions and grip design. The Glock 21SF (Short Frame) features a slightly shorter grip frame, which is designed to accommodate shooters with smaller hands for improved control and comfort. Additionally, the SF model has a reduced circumference in the grip, making it easier to handle while maintaining the same functionality and reliability as the standard Glock 21.
THE GALCO S.O.B. AND THE FOBUS LEATHER PANCAKE MADE FOR THE GLOCK MODEL 21 WILL ALSO FIT THE 21SF
For the Glock 21SF with a Picatinny rail, a holster designed specifically for this model is ideal. Look for options labeled for the Glock 21 or Glock 21SF with accessories, as they will accommodate the rail-mounted attachments. Popular choices include Kydex, leather, and tactical holsters from brands like Blackhawk, Safariland, and Alien Gear. Always ensure the holster provides a secure fit and allows for easy access.
For a basic Glock 21, new in box, between $600 - $650.
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Glock Ges.m.b.H. was created on 2010-03-21.
The Glock 21 was introduced in 1990. It is a .45 ACP caliber pistol developed by the Austrian company Glock, designed for law enforcement and military use as well as civilian markets. The Glock 21 features a polymer frame and a reputation for reliability and ease of use.
The glock 21 fires the .45 automatic colt pistol (.45acp, or .45 auto) round.
The Glock 21 does fire the .45 ACP, as does the Glock 30. You're probably thinking of the Glock 37, 38, and 39, which fire the .45 GAP cartridge - those cannot fire a .45 ACP.
Check your owner's manual or call Glock.
A Glock 21 magazine holds 13 rounds, a Glock 30 magazine holds ten rounds, and a Glock 36 magazine holds six rounds.
There are several models of Glock pistol in .45 calibre. The .45 ACP models include the Glock 21, Glock 30, and Glock 36. The .45 GAP models include the Glock 37, Glock 38, and Glock 39. Factory standard magazine capacities are as follows:Glock 21: 13 roundsGlock 30: 10 roundsGlock 36: 6 roundsGlock 37: 10 roundsGlock 38: 8 roundsGlock 39: 6 rounds