Let’s be honest. The Glock fanboy community has had a capacity problem for years, and the forums have been insufferable about it. Every time someone brought up the 15-round gap in the 43X lineup, some guy would patiently explain that Glock probably didn’t want to cannibalize G19 sales, and that guy was probably right. But that era is over. Lipsey’s, the distributor that has a habit of making things official before Glock issues a press release, has listed two products that confirm what the Glockstore hinted at months ago: the 43X is now Gen 6, it ships with the Aimpoint COA optic, and factory 15-round OEM magazines are real. The two SKUs, GL79269 and GLUX4350B3RM8A4, are the proof. Go tell your forum friends to close the Shield Arms thread.
The Gen 6 Frame, Now in Slim Line
When Glock dropped Gen 6 in late 2025, the first wave was all full-size guns: G17, G19, G45. The slimline family, including the 43X and 48, got left out of that first announcement, which predictably caused another round of online hand-wringing. The 43X is catching up now. The Gen 6 frame brings a palm swell, extended thumb rest, enlarged beavertail, and the new RTF6 grip texture, a combination of RTF2 and RTF4 that covers more of the frame than any previous generation, including the thumb rest area. Whether you run appendix or strong-side, the Gen 6 grip is a real upgrade on a platform that was already well-regarded ergonomically. Glock actually did work here, not just a new box and a slightly different number.
The Aimpoint COA: A Carry Optic That Earns the Name
The Aimpoint COA launched at SHOT Show 2025 as one of those rare products where the industry buzz actually matched the hardware. Glock and Aimpoint co-developed both the optic and the A-CUT mounting interface simultaneously, which is why this setup does not look or feel like someone bolted an afterthought onto a pistol slide. The A-CUT is a precision dovetail milled directly into the slide, and the COA locks into it without mounting plates, without adapter screws, without any of the stacking nonsense that has plagued optic setups on compact pistols for the last decade. No plates, no screws, no reason to re-zero every time you look at it funny.
The optic is enclosed-emitter, so the dot lives inside a sealed 7075-T6 aluminum housing that is protected from everything you are going to throw at it. A 3.5 MOA dot, same aperture window as the full-size ACRO P-2, 50,000-plus hours of battery life on a single bottom-accessed CR2032, and a housing rated to 40,000 rounds of 9mm. The COA sits lower on the 43X slide than even a direct-milled ACRO P-2, with iron sights built directly into the mounting hardware itself. It is a carry optic setup that actually makes sense on a compact pistol instead of just a range toy you can’t conceal without a parka.
After the Gen 5 COA guns sold out and Glock shifted production toward government contracts, getting one on the civilian market became a luck-and-timing exercise. The Gen 6 43X listing at Lipsey’s means the platform is back, upgraded, and available to people who are not filling out a 1105.
The Magazine Situation: Finally Put to Rest
Here is where it actually gets fun. The 43X has shipped with a 10-round magazine since it was introduced, which was fine until it wasn’t. When Shield Arms released their S15 steel 15-rounder, the community collectively lost its mind in excitement, then spent the next few years dealing with the fallout. The core problem is simple: the S15 is a steel magazine, and the 43X uses a polymer magazine release. Running steel mags against a polymer release causes accelerated wear and eventual damage to the release. Shield Arms sells their own metal replacement mag catch as a companion product, which solves the wear problem on the release but creates a new one: the metal catch will in turn damage OEM Glock polymer magazines over time.
So the choices have been: run all S15s with the metal release and accept that your factory mags are now taking a beating every time you use them, or stay on factory mags and live with 10 rounds. Neither is a great answer for someone whose whole reason for choosing the Glock platform was keeping everything stock and factory-reliable. The whole appeal of the 43X, and frankly the appeal of Glock in general, is that you buy it, it works, and you do not need to introduce compatibility questions into the equation. The Shield Arms workaround was functional for a lot of people but it was never clean.
The second Lipsey’s listing, GLUX4350B3RM8A4, is the standalone OEM 15-round magazine for the 43X, and critically, these magazines are backward compatible with existing 43X and 48 frames. You do not need to buy a new gun to get the capacity upgrade. Drop the factory 15-rounders into your current pistol, keep the polymer mag release intact, keep the platform fully stock, and stop explaining the Shield Arms mag catch situation to everyone at the range.
What This Looks Like in Practice
A Gen 6 Glock 43X with the Aimpoint COA and a factory 15-round magazine is the most capable version of this platform that has ever existed. The Gen 6 frame improvements give shooters a better grip on a gun that was already one of the better-feeling compact carries on the market. The COA brings a purpose-built carry red dot that sits low enough and weighs little enough to actually disappear under a cover garment. And the factory 15-round magazine means the capacity argument against the 43X, compared to carrying a G19, is effectively gone. You get 15+1 in a frame thin enough for appendix carry with a factory optic and factory mags and zero aftermarket compromises. That is the whole pitch right there.
Lipsey’s exclusive runs move quickly, and given how long the COA-equipped slimline was out of civilian production, inventory is going to be competitive. If your dealer stocks Lipsey’s product, that is the place to watch. For the existing 43X owners who want the magazine without the new gun, the standalone 15-rounder listing is the one to bookmark.
The Glockstore rumor was right. The Gen 6 43X with Aimpoint COA is confirmed through Lipsey’s, the OEM 15-round magazine is real and backward compatible, and Glock fanboys can finally log off the capacity complaint thread. It only took a few years.
Glock 43X Gen 6 COA at Lipsey’s | OEM 15-Round Magazine at Lipsey’s | Aimpoint COA Info
Leave a Reply