Which 9mm Glock Should You Buy?

People search for the best Glock 9mm like there is one winner. The 9mm Glock you buy is a size call. Grip length, slide length, and width split the 43, 43X, 48, 19, 17, 19X, and 45. The trigger is Safe Action on all of them. After the numbers, each listing is a magazine, optic, or finish package on one of those frames.

The 9mm Glocks we stock sit in four groups. Slimline is the thin 43, 43X, and 48. Compact double-stack is the 19. Full-size is the 17. Crossover is a 19-length slide on a 17-length frame: coyote 19X or black 45. MOS, Gen6 Optic Ready System, and factory Aimpoint COA are how the slide takes a red dot. Those optic packages sit on the same frames as the iron-sight guns.

In This Guide

• Grip length and width
• Slide length
• 9mm Glock hard numbers
• Glock 43 pistols we stock
• Glock 43X pistols we stock
• Glock 48 pistols we stock
• Glock 19 Gen6 pistols we stock
• Glock 17 Gen6 pistols we stock
• Glock 19X pistols we stock
• Glock 45 pistols we stock
• MOS, Gen6 ORS, and Aimpoint COA
• How to pick
• Which 9mm Glock FAQs

Grip length and width

You feel the gun in the grip first. Height with a magazine is 4.25 in. on the Glock 43, 5.04 in. on the 43X, 48, and 19, and 5.47 in. on the 17, 19X, and 45. That is the short Slimline, the compact grip, and the full-size grip.

Width is the other half of concealment. A Glock 43 is 1.06 in. wide. A 43X and a 48 are 1.10 in. wide. Slide width on those Slimline guns is 0.87 in. A Glock 19X is 1.30 in. wide. A Glock 17 Gen6 is 1.34 in. wide. A Glock 19 Gen6 and a Glock 45 Gen6 are 1.35 in. wide. Double-stack width is the price of 15- and 17-round flush magazines. Slimline width is the price of a thinner gun and a different magazine family.

The magazines follow the grip. Glock 43 magazines are six-round magazines for that short grip. The 43X and 48 share Slimline magazines: 10-round as standard, and Glock also makes OEM 15-round Slimline magazines. Glock 19 magazines are 15-round as standard. The 17, 19X, and 45 use 17-round magazines in the Glock 17 pattern. A 17-round Glock 17 magazine works in a Glock 19; the extra length hangs below the grip. Glock 43 magazines and Glock 43X magazines are not the same. We stock 10-round pistols in the double-stack families for states that require them. Spare magazines sit on the Glock magazines page.

Slide length

The slide is what you hide on the belt and what you get as sight radius. The 43 and 43X share a 6.06 in. slide over a 3.41 in. barrel. Overall length is 6.26 in. on the 43 and 6.50 in. on the 43X, because the 43X grip is longer.

The 19, 48, 19X, and 45 share a 6.85 in. slide. The 19, 19X, and 45 use a 4.02 in. barrel. The 48 uses a 4.17 in. Marksman Barrel in that same 6.85 in. slide length. Overall length is 7.28 in. on the 19 and the 48, and 7.44 in. on the 19X and 45. That extra overall length is the full-size frame in front of the compact slide.

The 17 is the long slide. A Glock 17 Gen6 slide is 7.32 in. over a 4.49 in. barrel. Overall length is 7.95 in. Sight radius on the polymer sights is 6.18 in. on the 19 and 6.65 in. on the 17. The 17 is the most gun in the holster. The 43 is the least.

9mm Glock hard numbers

These are Glock’s current US numbers for the standard iron-sight pistols in each family. Threaded barrels, night sights, and factory optic packages change weight and, on some guns, length. Read the listing on the pistol you actually want.

Spec	Glock 43	Glock 43X	Glock 48	Glock 19 Gen6	Glock 17 Gen6	Glock 19X	Glock 45
Size	Slimline	Slimline compact	Slimline compact	Compact	Full-size	Crossover	Crossover
Barrel	3.41 in.	3.41 in.	4.17 in.	4.02 in.	4.49 in.	4.02 in.	4.02 in.
Slide	6.06 in.	6.06 in.	6.85 in.	6.85 in.	7.32 in.	6.85 in.	6.85 in.
Overall length	6.26 in.	6.50 in.	7.28 in.	7.28 in.	7.95 in.	7.44 in.	7.44 in.
Height with magazine	4.25 in.	5.04 in.	5.04 in.	5.04 in.	5.47 in.	5.47 in.	5.47 in.
Width	1.06 in.	1.10 in.	1.10 in.	1.35 in.	1.34 in.	1.30 in.	1.34 to 1.35 in.
Standard magazine	6-round	10-round Slimline	10-round Slimline	15-round	17-round	17-round	17-round
Optic-ready	No	MOS or COA	MOS or COA	ORS or COA	ORS or COA	MOS on MOS guns	MOS, ORS, or COA

Glock 45 width is 1.34 in. on the Gen5 MOS guns and 1.35 in. on Gen6. The 43X, 48, 19X, and Gen5 G45 MOS use a Marksman Barrel on the current US pages. Gen6 17, 19, and 45 barrels are 4.02 in. or 4.49 in. without that name. The 43 uses a 3.41 in. barrel without that name.

Glock 43 pistols we stock

The Glock 43 is Glock’s original Slimline 9mm. It is the smallest 9mm Glock we sell. A 3.41 in. barrel sits in a 6.06 in. slide. Overall length is 6.26 in., height with a magazine is 4.25 in., and width is 1.06 in. The short grip holds a six-round magazine. The pistol weighs 16.23 oz without a magazine on the factory black gun.

The 43 has no accessory rail in front of the trigger guard. Factory polymer sights sit on an iron-sight slide. Cerakote and print 43s on the collection are a dealer finish of this same size and magazine. The full family sits on the Glock 43 pistols collection.

Factory Glock 43

The Glock 43 9mm 3.41″ 6-Round Pistol is the factory USA black 43. Two 6-round magazines ship in the box. A factory red dot is not installed. The finish is black. This is the short-grip Slimline, with a 3.41 in. barrel, a 6.06 in. slide, 6.26 in. overall, 4.25 in. tall, and 1.06 in. wide.

Refurbished Glock 43

The Glock 43 Refurbished 9mm 3.41″ 6-Round Black Pistol is a factory-rebuilt Glock 43. Size and magazines match the factory black 43: 3.41 in. barrel, six-round magazines, no rail, no MOS. The finish is black. Read the listing for the rebuilt package.

Glock 43X pistols we stock

The Glock 43X keeps the 43’s 3.41 in. Marksman Barrel and 6.06 in. slide, then adds the compact-length grip Glock uses on the 48. Overall length is 6.50 in. Height with a magazine is 5.04 in. Width is 1.10 in. You get a full three-finger grip on a Slimline slide. Standard magazines are 10-round Slimline. Glock also makes OEM 15-round Slimline magazines for this grip.

A slim accessory rail sits in front of the trigger guard. MOS 43X pistols use a factory RMSc-pattern cut with no adapter plates in the box. Aimpoint COA 43X pistols use Glock’s A-CUT and skip those plates. Cerakote and print 43X pistols are a dealer finish of this size. The full family sits on the Glock 43X pistols collection.

10-round Glock 43X

The Glock 43X 9mm 3.41″ 10-Round Pistol is the Slimline 43X with factory polymer sights and 10-round magazines. A 3.41 in. Marksman Barrel sits in the 6.06 in. slide. Overall length is 6.50 in. Height with a magazine is 5.04 in.

A factory red dot is not installed. The finish is black. This is the iron-sight 43X with a slim rail, a compact grip, and 10-round Slimline magazines.

10-round Glock 43X MOS

The Glock 43X MOS 9mm 3.41″ 10-Round Pistol is the Slimline 43X with a factory MOS slide and 10-round magazines. The MOS cut is RMSc-pattern. Adapter plates are not in the box. A factory red dot is not installed.

Size matches the iron-sight 43X: 3.41 in. Marksman Barrel, 6.06 in. slide, 6.50 in. overall, 5.04 in. tall, 1.10 in. wide. The finish is black.

15-round Glock 43X MOS

The Glock 43X MOS 9mm 3.41″ 15-Round Pistol is the same MOS 43X with OEM 15-round Slimline magazines. The slide still uses the factory RMSc-pattern cut. Adapter plates are not in the box. A factory red dot is not installed.

The grip, slide, and barrel stay Glock 43X: 3.41 in. Marksman Barrel, 6.06 in. slide, 6.50 in. overall, 5.04 in. tall. The 15-round Slimline magazine fills that compact grip.

Glock 43X with Aimpoint COA

The Glock 43X MOS 9mm 3.41″ 10-Round Pistol w/Aimpoint COA is the Slimline 43X with a factory Aimpoint COA already on the slide. The optic is an enclosed 3.5 MOA red dot. Glock mills an A-CUT dovetail into the slide, and the COA locks on a patented wedge. Adapter plates are not used. Factory backup sights co-witness with the optic.

This listing is the Austria-built 10-round COA 43X. The 15-round Austria COA 43X is the same A-CUT gun with 15-round Slimline magazines. Live titles still say MOS. The slide on these pistols is A-CUT, not the empty RMSc MOS cut. Both also sit on the Glock COA pistols collection.

Glock 48 pistols we stock

The Glock 48 is the Slimline 9mm with compact length. It uses the same 43X grip and the same Slimline magazines under a longer slide. A 4.17 in. Marksman Barrel sits in a 6.85 in. slide. Overall length is 7.28 in. Height with a magazine stays 5.04 in. Width stays 1.10 in.

That 6.85 in. slide is the same length as a Glock 19 slide, on a gun that is still 1.10 in. wide. A slim rail sits in front of the trigger guard. MOS and Aimpoint COA 48s follow the same optic split as the 43X. The full family sits on the Glock 48 pistols collection.

10-round Glock 48

The Glock 48 9mm 4.17″ 10-Round Rail Pistol is the Slimline 48 with a slim rail, factory polymer sights, and 10-round magazines. A 4.17 in. Marksman Barrel sits in the 6.85 in. slide. Overall length is 7.28 in.

A factory red dot is not installed. The finish is black. This is the iron-sight 48 with a 43X grip, a 19-length Slimline slide, and 10-round magazines.

10-round Glock 48 MOS

The Glock 48 9mm 4.17″ 10-Round MOS Pistol is the Slimline 48 with a factory MOS slide and 10-round magazines. The MOS cut is RMSc-pattern. Adapter plates are not in the box. A factory red dot is not installed.

Size matches the iron-sight 48: 4.17 in. Marksman Barrel, 6.85 in. slide, 7.28 in. overall, 5.04 in. tall, 1.10 in. wide. The finish is black.

15-round Glock 48 MOS

The Glock 48 9mm 4.17″ 15-Round MOS Pistol is the same MOS 48 with OEM 15-round Slimline magazines. The slide still uses the factory RMSc-pattern cut. Adapter plates are not in the box. A factory red dot is not installed.

The grip, slide, and barrel stay Glock 48: 4.17 in. Marksman Barrel, 6.85 in. slide, 7.28 in. overall, 5.04 in. tall.

Glock 48 with Aimpoint COA

The Glock 48 9mm 4.17″ 10-Round MOS8 Pistol w/Aimpoint COA is the Slimline 48 with a factory Aimpoint COA already on the slide. The optic is an enclosed 3.5 MOA red dot on Glock’s A-CUT and patented wedge. Adapter plates are not used. Factory backup sights co-witness with the optic.

MOS8 is the factory A-CUT package on this 48. The gun uses 10-round Slimline magazines. This pistol also sits on the Glock COA pistols collection.

Glock 19 Gen6 pistols we stock

The Glock 19 is Glock’s compact 9mm, and it is the compact Glock 9mm most people mean. A 4.02 in. barrel sits in a 6.85 in. slide. Overall length is 7.28 in. Height with a magazine is 5.04 in. Width is 1.35 in. Standard magazines are 15-round. The pistol weighs 20.11 oz without a magazine on the standard Gen6 gun.

The 19s we stock right now are Gen6. The frame uses a palm swell, a thumb rest, and Gen6 texture, with an enlarged beavertail and an undercut trigger guard. The trigger is flat-faced Safe Action. A Glock accessory rail sits in front of the trigger guard. Gen6 optic-ready 19s use the Optic Ready System with three plates. Threaded and factory EOTech 19s sit on the collection with these guns. The full family sits on the Glock 19 pistols collection.

15-round Glock 19 Gen6 ORS

The Glock 19 Gen 6 9mm 4.02″ 15-Round ORS Pistol is the compact 9mm with a factory Optic Ready System slide and 15-round magazines. A 4.02 in. barrel sits in the 6.85 in. slide, and overall length is 7.28 in. The pistol weighs 20.11 oz without a magazine.

Three 15-round magazines ship in the box, along with three ORS plates. A factory red dot is not installed. The finish is black. This is the standard compact 19: plates in the box, polymer sights on the slide, 15 rounds flush with the grip.

10-round Glock 19 Gen6

The Glock 19 Gen 6 9mm 4.02″ 10-Round Pistol is the same compact Gen6 19 with 10-round magazines. The slide still has the factory Optic Ready System cut, and three plates ship in the box.

Three 10-round magazines ship in the box. Size matches the 15-round gun: 4.02 in. barrel, 6.85 in. slide, 7.28 in. overall, 5.04 in. tall, 20.11 oz without a magazine. A factory red dot is not installed. The finish is black.

Glock 19 Gen6 with Aimpoint COA

The Glock 19 Gen 6 9mm 4.02″ 15-Round DC8 Pistol w/Aimpoint COA is the compact 19 with a factory Aimpoint COA already on the slide. The optic is an enclosed 3.5 MOA red dot on Glock’s A-CUT and patented wedge. Adapter plates are not in the box. Factory backup sights co-witness with the optic.

The gun uses 15-round Glock 19 magazines. DC8 is the factory A-CUT package. This pistol also sits on the Glock COA pistols collection.

Glock 17 Gen6 pistols we stock

The Glock 17 is Glock’s full-size 9mm. You get the longer slide, the longer sight radius, and two extra rounds in a flush magazine. A 4.49 in. barrel sits in a 7.32 in. slide. Overall length is 7.95 in. Height with a magazine is 5.47 in. Width is 1.34 in. Standard magazines are 17-round. The pistol weighs 21.16 oz without a magazine on the standard Gen6 gun.

The 17s we stock right now are Gen6. The frame uses the same palm swell, thumb rest, Gen6 texture, enlarged beavertail, and undercut trigger guard as the 19. The trigger is flat-faced Safe Action. A Glock accessory rail sits in front of the trigger guard. The ORS guns use the same three-plate set as the 19. Threaded 17s sit on the collection with these guns. The full family sits on the Glock 17 pistols collection.

17-round Glock 17 Gen6 ORS

The Glock 17 Gen 6 9mm 4.49″ 17-Round ORS Pistol is the full-size 9mm with a factory Optic Ready System slide and 17-round magazines. A 4.49 in. barrel sits in the 7.32 in. slide, and overall length is 7.95 in. The pistol weighs 21.16 oz without a magazine.

Three 17-round magazines ship in the box, along with three ORS plates. A factory red dot is not installed. The finish is black. This is the standard full-size 17: plates in the box, polymer sights on the slide, 17 rounds flush with the grip.

10-round Glock 17 Gen6 ORS

The Glock 17 Gen 6 9mm 4.49″ 10-Round ORS Pistol is the same full-size Gen6 17 with 10-round magazines. The slide still has the factory Optic Ready System cut, and three plates ship in the box.

Three 10-round magazines ship in the box. Size matches the 17-round gun: 4.49 in. barrel, 7.32 in. slide, 7.95 in. overall, 5.47 in. tall, 21.16 oz without a magazine. A factory red dot is not installed. The finish is black.

Glock 17 Gen6 with Aimpoint COA

The Glock 17 Gen 6 9mm 4.49″ 17-Round DC8 Pistol w/Aimpoint COA is the full-size 17 with a factory Aimpoint COA already on the slide. The optic is an enclosed 3.5 MOA red dot on Glock’s A-CUT and patented wedge. Adapter plates are not in the box. Factory backup sights co-witness with the optic.

The gun uses 17-round Glock 17 magazines. DC8 is the factory A-CUT package. This pistol also sits on the Glock COA pistols collection.

Glock 19X pistols we stock

The Glock 19X is Glock’s first crossover 9mm: a G19-length slide on a G17-length frame, finished in coyote. A 4.02 in. Marksman Barrel sits in a 6.85 in. slide. Overall length is 7.44 in. Height with a magazine is 5.47 in. Width is 1.30 in. Standard magazines are 17-round magazines in the Glock 17 pattern. The original 19X weighs 22.05 oz without a magazine.

The original guns have a lanyard loop. MOS 19X pistols ship with one adapter plate. A Glock accessory rail sits in front of the trigger guard. The full family sits on the Glock 19X pistols collection.

Glock 19X with night sights

The Glock 19X 9mm 4.02″ 17-Round Night Sights Coyote/FDE Pistol is the original coyote crossover with factory night sights. A 4.02 in. Marksman Barrel sits in the 6.85 in. slide. Overall length is 7.44 in. Height with a magazine is 5.47 in. Width is 1.30 in.

The gun uses 17-round magazines in the Glock 17 pattern. The original 19X box includes a 17-round magazine and two 19-round magazines. The finish is coyote nPVD. A factory red dot is not installed. The original frame has a lanyard loop.

Glock 19X MOS

The Glock 19X 9mm 4.02″ 19-Round MOS Ameriglo Coyote/FDE Pistol is the coyote crossover with a factory MOS slide and Ameriglo sights. One adapter plate ships in the box. A factory red dot is not installed.

Size stays Glock 19X: 4.02 in. Marksman Barrel, 6.85 in. slide, 7.44 in. overall, 5.47 in. tall, 1.30 in. wide. The gun uses Glock 17-pattern magazines. This listing ships 19-round magazines.

10-round Glock 19X

The Glock 19X Gen5 9mm 4.02″ 10-Round FDE Pistol is the coyote crossover with 10-round magazines. Size matches the 17-round 19X: 4.02 in. Marksman Barrel, 6.85 in. slide, 7.44 in. overall, 5.47 in. tall, 1.30 in. wide.

A factory red dot is not installed. The finish is FDE. This is the 19X for states that require 10-round magazines.

Glock 45 pistols we stock

The Glock 45 takes that compact-slide, full-size-frame layout into black. A 4.02 in. barrel sits in a 6.85 in. slide. Overall length is 7.44 in. Height with a magazine is 5.47 in. Standard magazines are 17-round magazines in the Glock 17 pattern.

Gen5 MOS G45 pistols use a 4.02 in. Marksman Barrel, measure 1.34 in. wide, and weigh 21.73 oz without a magazine. They ship with one adapter plate. Gen6 G45 pistols use a 4.02 in. barrel without that Marksman name, measure 1.35 in. wide, and weigh 20.28 oz without a magazine. They use the Optic Ready System with three plates. Aimpoint COA G45 pistols use A-CUT and skip those plates. The full family sits on the Glock 45 pistols collection.

17-round Glock 45 Gen6 ORS

The Glock 45 Gen 6 9mm 4.02″ 17-Round ORS Optic-Ready Made in Austria Pistol is the black compact crossover with a factory Optic Ready System slide and 17-round magazines. A 4.02 in. barrel sits in the 6.85 in. slide. Overall length is 7.44 in. Height with a magazine is 5.47 in. Width is 1.35 in. The pistol weighs 20.28 oz without a magazine.

Three ORS plates ship in the box. A factory red dot is not installed. The finish is black. This listing is the Austria-built gun. The USA-built 17-round Gen6 45 is the same configuration with a U prefix.

10-round Glock 45 Gen6 ORS

The Glock 45 Gen 6 9mm 4.02″ 10-Round ORS Optic-Ready Made in Austria Pistol is the same Gen6 45 with 10-round magazines. The slide still has the factory Optic Ready System cut, and three plates ship in the box.

Size matches the 17-round Gen6 45: 4.02 in. barrel, 6.85 in. slide, 7.44 in. overall, 5.47 in. tall, 1.35 in. wide, 20.28 oz without a magazine. A factory red dot is not installed. The finish is black. This listing is Austria-built.

17-round Glock 45 MOS

The Glock 45 9mm 4.02″ 17-Round MOS Pistol is the Gen5 MOS compact crossover with 17-round magazines. A 4.02 in. Marksman Barrel sits in the 6.85 in. slide. Overall length is 7.44 in. Width is 1.34 in. The pistol weighs 21.73 oz without a magazine.

One adapter plate ships in the box. A factory red dot is not installed. The finish is black. Those MOS plates are a different set from the Gen6 ORS plates.

Glock 45 Gen6 with Aimpoint COA

The Glock 45 Gen 6 9mm 4.02″ 17-Round Pistol w/Aimpoint COA is the black compact crossover with a factory Aimpoint COA already on the slide. The optic is an enclosed 3.5 MOA red dot on Glock’s A-CUT and patented wedge. Adapter plates are not used. Factory backup sights co-witness with the optic.

The gun uses 17-round magazines in the Glock 17 pattern. Size stays Glock 45 Gen6: 4.02 in. barrel, 6.85 in. slide, 7.44 in. overall, 5.47 in. tall. This pistol also sits on the Glock COA pistols collection.

MOS, Gen6 ORS, and Aimpoint COA

MOS is a factory-milled slide for a reflex sight. Double-stack MOS pistols currently ship with one adapter plate. Slimline MOS on a 43X or 48 uses an RMSc-pattern cut and does not include adapter plates. A factory red dot is not installed on those guns unless the listing says so.

Gen6 optic-ready 17, 19, and 45 pistols use Glock’s Optic Ready System and three plates. Those plates are a different set from the Gen5 MOS plates. A factory red dot is still not installed unless the listing names one.

Glock COA pistols ship with a factory Aimpoint COA on A-CUT. Glock mills a dovetail into the slide, and the enclosed 3.5 MOA optic locks on a patented wedge without MOS or Optic Ready System plates. Factory backup sights co-witness with the optic. MOS8 and DC8 in a title are factory COA suffixes. Shop those packages on the Glock COA pistols collection.

How to pick

Start with width and grip. The 43 is the smallest 9mm Glock here: 1.06 in. wide, 4.25 in. tall, six rounds. The 43X keeps that thin slide and gives you the compact grip and Slimline 10- or 15-round magazines. The 48 keeps that Slimline width and adds a 6.85 in. slide, the same length as a 19, with a 4.17 in. barrel.

The 19 is the compact double-stack 9mm: 15 rounds flush, 5.04 in. tall, 1.35 in. wide. The 17 is the full-size 9mm: 17 rounds flush, 5.47 in. tall, the long slide. The 19X is that 19 slide on a 17 grip in coyote, 1.30 in. wide. The 45 is the black version of that mixed size.

Then pick the slide that matches how you want a red dot. Irons, MOS or ORS plates in the box, or a factory Aimpoint COA already on the gun. After that, pick 10-round magazines if your state requires them.

The named pages are Glock 43, Glock 43X, Glock 48, Glock 19, Glock 17, Glock 19X, and Glock 45, or use the Glock pistols hub. Handguns ship to a licensed FFL.

Which 9mm Glock FAQs

Specs were checked against Glock’s US product pages for the G43, G43X, G48, G19 Gen6, G17 Gen6, G19X, and G45 Gen6. This is a specification-based buying guide, not a claimed range test.