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Glock makes four pistols—G20, G21, G29, and G30/G30s—that do not fit neatly into any category. Because of their caliber these pistols do not share specs, but they do occur in Glocks two most popular sizes—standard and sub-compact.

Glock’s G20, G21, G29, and G30 do not appeal to as many people as their ubiquitous 9mm or .40 S&W guns. The rarer caliber will keep away those who want just a standard pistol. However, if you are someone who loves either 10mm or .45 ACP then give any of these pistols a closer look.

READ MORE BELOW on Specs, Models, and Diagram

Best G20 G21 G29 G30 G30’s Holsters

IWB Holsters

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OWB Holsters

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Digging into the Standard Size Glock

Both of the following pistols fall into Glock’s standard size category; although, they are slightly larger than the industry benchmark G17.

G20 Specifications

The G20 shoots a 10mm cartridge. This caliber was introduced in 1983, but was not included in a Glock pistol until 1991. Like the .357, the 10mm lost its popularity due to the rise of .40 S&W.[1] Glock advertises this pistol for law enforcement personal and handgun hunters.[2]

G20 gen 4 and SF: 10mm Auto

Specs

Length: 8.03 in.

Height: 5.47 in.

Width: 1.27 in.

Barrel Height: 1.26 in.

Barrel Length: 4.60 in.

Weight (unloaded): 30.71 oz.

Trigger Pull: about 5.5 lbs.

Magazine Capacity: 15

Why Buy?

Reviewers have noted its high accuracy rate and easy shot.[3] The extra size of this pistol in relation to other Glock standards help keep the shot flat with little recoil, which makes this an ideal full-size defense or hunting pistol. If you are one of 10mm’s loyal followers, then the G20 will work for you. Also, if you want to try hunting with a high-power caliber and a big-bore barrel, then make sure to try a G20.

G21 Specifications

Glock provided another full-size gun in a large caliber when they introduced the G21 in the 1990s. The G21 shoots .45 ACP.

G21 gen 4 and SF: .45 Auto

Specs

Length: 8.03 in.

Height: 5.47 in.

Width: 1.27 in.

Barrel Height: 1.26 in.

Barrel Length: 4.60 in.

Weight (unloaded): 29.30 oz.

Trigger Pull: about 5.5 lbs.

Magazine Capacity: 13

Why Buy?

Despite being a full-size pistol, Glock’s use of polymer instead of metal keeps the weight down on the G21. Glock keeps the 5.5 lb. trigger pull, which make the G21 easy to shoot accurately. It is still slightly larger and heavier than the G17, but is a very reasonable size for a police duty carry gun. It can also be used well as a home defense weapon.

Sub-Compact

In an attempt to fit into the growing demand for conceal carry weapons (CCW), Glock has created a large line of sub-compact pistol. In fact, this line holds the same number of models as their popular standard line. The two sub-compacts listed here—G29 and G30—shoot 10mm and .45 ACP respectively.

G29 Specifications

Glock’s 10mm sub-compact is extremely similar in model to their other sub-compact offerings, excepting the caliber of course.

G29 gen 4 and SF: 10mm Auto

Specs

Length: 6.88 in.

Height: 4.45 in.

Width: 1.27 in.

Barrel Height: 1.26 in.

Barrel Length: 3.77 in.

Weight (unloaded): 26.83 oz.

Trigger Pull: about 5.5 lbs.

Magazine Capacity: 10

Why Buy?

10mm rounds will produce much more damage than their 9mm and .40 S&W counterparts. However, the large ammunition in such a small pistol is going to create some recoil. If you want a concealable pistol with large fire-power, and are willing to deal with some bite, then this is the pistol for you.

G30/G30s Specifications

We’ve lumped the G30 and G30s together because in many respects they are the same pistol. They both shoot .45 ACP and share a frame. Glock released the G30s in early 2000s, and added the extra letter to indicate the slim nature of the pistol. In order to slim the G30’s frame down, Glock incorporated the slide from the slimline G36.[4] Thus, the G30 is a traditional sub-compact, while the G30s is a hybrid sub-compact that presents a slim profile.

G30 gen 4, SF, and G30s: .45 Auto

Specs

Length: 6.96 in.

Height: 4.80 in.

Width: 1.27 in.

Barrel Height: 1.26 in.

Barrel Length: 3.77 in.

Weight (unloaded): 22.95 oz.

Trigger Pull: about 5.5 lbs.

Magazine Capacity: 10

Why Buy?

Both the G30 and the G30s are completely concealable pistols. The small size—especially with the slim G30s—keeps them from printing or weighing you down if you carry all day. The large .45 ACP rounds are going to create some damage if you need to use the pistol. Thus, you get the best of both worlds with the G30 and G30s, an ultra-concealable weapon with some big firepower.

Conclusion

[1] Payton Miller, “Glock 20 Gen 4 Review,” Guns & Ammo (August 14, 2013), http://www.gunsandammo.com/reviews/gen-4-glock-20-review/ (accessed 3/3/18).

[2] B. Gil Horman, “Glock Gen4 G20 10 mm Pistol,” American Rifleman (August 6, 2013), https://www.americanrifleman.org/articles/2013/8/6/glock-gen4-g20-10-mm-pistol/ (Accessed 3/3/18).

[3] B. Gil Horman, “Glock Gen4 G20 10 mm Pistol,” American Rifleman (August 6, 2013), https://www.americanrifleman.org/articles/2013/8/6/glock-gen4-g20-10-mm-pistol/ (Accessed 3/3/18).

[4] A. J. George, “Glock 30S Subcompact Pistol,” Police: The Law Enforcement Magazine (September 11, 2013), http://www.policemag.com/channel/weapons/articles/2013/09/glock-30s-subcompact-pistol.aspx (accessed 3/3/18).