Glock 19 magazines: what fits, extensions and baseplates

The Glock 19 magazine holds 15 rounds of 9mm and fits every Glock 19 ever made, along with the Glock 26. It also accepts every longer 9mm Glock magazine in its well, which is why a 19 owner has more magazine choices than almost any other pistol owner. This guide covers the factory versions, the generation changes, what else fits, the aftermarket, baseplates and the state limits that decide what ships where.

The factory 15-round magazine

Like every Glock magazine it is a polymer body over a steel liner, with a polymer follower, a steel spring and a removable floorplate with an insert, and witness holes on the back. It has been fully lined and drop-free since the early 1990s. A 19 magazine fits and functions in a Glock 26, protruding below the grip. It will not lock into a 17, 19X or 45 frame, because the full-size well is taller than the magazine.

Gen 4 and Gen 5 changes

Gen 4 introduced the reversible magazine catch, so Gen 4 magazines have a catch notch on both sides. They work in every earlier 19. Older single-notch magazines work in a Gen 4 or Gen 5 pistol with the catch in the standard right-handed position; reverse the catch and you need double-notch magazines. Gen 5 magazines have an orange follower and a floorplate with an extended front lip for the flared magazine well; they also work in every earlier 19, with the lip standing out slightly in front on a Gen 3 grip.

The 10-round version

Glock's 10-round 19 magazine is the same body with an internal block, made for states that cap capacity. It is the version we ship to those states. Do not modify it; removing the block is illegal in the states that require it.

Longer Glock magazines that fit

Every 9mm double-stack Glock magazine longer than the 19's fits a 19: the 17-round Glock 17 magazine, the 19-round 19X magazine, the 24-round and the 33-round. They protrude below the grip by the difference in length. A 17-round magazine is the usual spare for a carried 19 and the usual nightstand magazine, and it is what most 19 owners carry in the pouch. Slimline magazines from the 43, 43X and 48 do not fit; they are single stack.

Aftermarket magazines

The Magpul PMAG 15 GL9 is the most common aftermarket 19 magazine and has a good record; Magpul's 21 and 27-round magazines also fit. ETS makes translucent 15, 22 and 31-round magazines. Older imported magazines vary widely and are the most frequent cause of feed problems we hear about. For a carry pistol, factory or Magpul; for the range, whatever runs in your gun.

Baseplates and extensions

A replacement baseplate adds one to five rounds to a 19 magazine with a longer spring, and adds the same length to the grip. A plus-two on a 19 is the popular compromise: 17 rounds with a small extension that gives the pinky more purchase. A plus-five turns the magazine into a 20-round range magazine. Aluminum plates are durable and heavier; polymer plates are lighter and cheaper. Extensions count toward state capacity limits, so a plus-two in a 15-round state is over the line. Pinky extensions that add no capacity are legal everywhere.

Springs, followers and care

Springs wear from cycling, not from sitting loaded. Replace a spring when the last round nose-dives or the slide stops locking back, roughly every few thousand rounds of use. Followers rarely fail and cost little. Disassemble by pressing the floorplate insert through its hole and sliding the plate forward, wipe the inside dry and do not oil it. Number your magazines with a paint pen so you can retire the one that fails.

Loading and seating

A new 15-round magazine is stiff for the last two rounds; use the loader that comes in the box. Seat every magazine with a firm push and a tug, especially a 17-round magazine in a 19, which has a little more leverage to work loose if it is not fully home. A magazine that will not seat on a closed slide with 15 rounds is usually overfilled by one or has a tired follower.

Magazines for the 26 and the 43X

Owners often ask whether 19 magazines fit their other Glocks. They fit and function in a Glock 26, sticking out below the grip, and a sleeve fills the gap. They do not fit the 43, 43X or 48, which are single-stack pistols with their own slimline magazines, and they do not fit any full-size frame. Going the other way, a 17 or 33-round magazine fits a 19 and a 26.

State limits

Several states cap handgun magazines at 10 rounds and a few at 15, and some cities add rules. The 15-round factory magazine is legal in most of the country and over the limit in the 10-round states, where we ship the factory 10-round version. Extended magazines and baseplates only ship where legal; the checkout tells you before payment. Check the summary for your state on our city pages.

What to buy

• Carry: factory Gen 5 15-round magazines, plus a 17-round spare.
• Range: Magpul 15 or 21, factory 24 where legal.
• Plus-two grip length: an aluminum plus-two baseplate on a factory magazine, where legal.
• 10-round states: the factory 10-round magazine.

Browse Glock 19 magazines and baseplates, see which magazines fit the crossover frames in 19 vs 19X vs 45, and set up a carry pistol with the carry guide.

General information, not legal advice. Current as of September 2026. Laws change; check the official source before you act.