Selected Handgun Detail

Manufacturer
	Glock Ges.m.b.H. More Info

About the Gun

The Glock 20 (full-size 10mm Auto) was introduced in the early 1990s as Glock expanded into larger calibers beyond the initial 9mm lineup. The first three generations of Glock pistols were simply marked with the model number. The Glock 20 does not have a Gen1 variant. It first appeared during the Gen2 era, so its pre-Gen4 production consists only of Gen2 and Gen3 configurations.

Production

Production of this variant began in 1998 and continued through the early 2010s.

Market value

MSRP at production was around $550–$600. Current used market value is $550–$600 for examples in good to excellent condition.

Cartridge Specifications
Cartridge:	10 mm
Alias:	N/A
More Info

Analysis

The Glock 20 is a full-size, polymer-framed pistol chambered in 10mm Auto, originally developed to provide a high-capacity handgun capable of handling the cartridge's power in a service or hunting configuration. It entered production as a Gen2 model around 1990-1991, featuring a checkered front and back strap with pebble-texture side panels, no accessory rail, and no finger grooves or thumb rests on the frame. Gen3 versions, which began appearing for this model around 1998-2000, introduced an accessory rail on the dust cover, finger grooves along the front strap, thumb rests above the trigger guard, and a revised grip texture pattern. Later Gen3 production included the G20SF variant with a reduced-circumference grip frame for improved fit on smaller hands, while maintaining the same overall dimensions and slide/barrel assembly as the standard Gen3. Both generations use a locked-breech, short-recoil operating system with a polygonal rifled barrel and double-stack magazines holding 15 rounds standard. Pre-Gen4 Glock 20 examples see steady but limited circulation compared to more common 9mm or .40 S&W models, reflecting the 10mm Auto's narrower appeal. Gen2 versions remain the scarcer of the two due to lower original production volumes and greater age, with early slides sometimes marked simply "10mm" without "AUTO" in the lowest serial ranges. These are often sought by collectors or those preferring the simpler grip profile without finger grooves. Gen3 models dominate the used inventory, appearing more frequently in standard and SF configurations; the added rail supports aftermarket light or laser attachments, though the finger grooves and thumb rests draw mixed reception depending on hand size. Both generations share substantial parts interchangeability with the Glock 21 in corresponding eras, facilitating access to holsters, magazines, and recoil management components, while the platform's robust construction accommodates a range of 10mm loads from standard-pressure factory ammunition to higher-energy options.