Glock 43X MOS Aimpoint COA 15+1 9mm

Description

Glock 43X MOS Aimpoint COA 15+1 9mm

The Glock 43X MOS Aimpoint COA 15+1 is the carry pistol for the shooter who’s done compromising — full-capacity slim-line frame, factory-integrated enclosed emitter, and zero adapter plates between you and your zero.

The G43X platform pairs Glock’s compact-grip frame with a subcompact-slim slide — a combination that gives you a genuine three-finger grip without the bulk of a full-size pistol. Because this variant ships with two 15-round magazines instead of the old standard 10-rounders, you get meaningful capacity without changing a single dimension of the gun. The Glock Marksman Barrel (GMB) runs inside a nDLC-treated slide that resists corrosion and matte-minimizes light reflection, while the integrated beavertail and front accessory rail round out a frame that punches well above its weight class for everyday carry.

What sets this specific configuration apart is the Aimpoint A-CUT interface. Rather than stacking the COA on top of an adapter plate, Glock machines the slide to accept the Aimpoint COA directly — which means the optic sits lower, the bore axis stays manageable, and nothing loosens between the two. The COA itself features an enclosed emitter that shrugs off rain, lint, and pocket debris, a 3.5 MOA red dot with twelve brightness settings (four NVD-compatible), and a CR2032 battery rated for up to 50,000 hours at daylight setting 7. Because the fixed Glock sights co-witness through the window, you’re not giving up iron sight access in the process.

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Key Features — Glock 43X MOS Aimpoint COA 15+1

• Caliber: 9mm Luger
• Barrel: 3.39″ Glock Marksman Barrel (GMB), nDLC Gas Nitride finish
• Capacity: 15+1 — includes two (2) 15-round magazines
• Optic: Aimpoint COA — factory-mounted via A-CUT direct interface, no adapter plates
• Dot: 3.5 MOA red dot, 12 brightness settings (4 NVD), CR2032 battery (50,000 hr rated)
• Sights: Fixed Glock front/rear, co-witness with COA window
• Frame: Polymer with front accessory rail and beavertail
• Weight: 18.6 oz unloaded
• OAL: 6.5″
• Safe Action trigger system — three internal safeties, no manual safety
• Extractor serves as loaded chamber indicator
• Includes: OEM plastic case, 2x 15rd magazines, magazine loader, cleaning kit, gun lock

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Why This Product Stands Out

The 43X has always made sense for everyday carry. The subcompact slide keeps it manageable under a cover garment, while the compact grip frame gives your hand something to actually hold onto. However, the standard 10-round configuration has always been the concession most Texas shooters resented making. This 15-round variant eliminates that tradeoff entirely — same external dimensions, significantly more capacity, and it ships that way from the factory.

Furthermore, the A-CUT mounting system is worth understanding before you compare this to a 43X with an aftermarket optic. Most shooters who run a red dot on a slim-line Glock are stacking the optic on an adapter plate that sits above the slide cuts. Because the COA mounts directly into machined Glock slide cuts, the optic sits lower, the point of impact is more intuitive coming off the draw, and there is no plate-stack rattle to worry about zero-shift from. Aimpoint builds the COA with an enclosed emitter — the lens is sealed, which matters on a carry gun that lives in a holster against a body rather than in a range bag.

The 15-round A-CUT COA combo does not sit on shelves indefinitely. If you’ve been waiting for a turnkey carry setup that doesn’t require any post-purchase optic shopping, trigger-swapping, or magazine upgrades — this is that gun.

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Ideal Use Cases

• Everyday concealed carry (IWB/AIWB)
• Home defense as a secondary or partner firearm
• Carry optics competition (USPSA CO, IDPA CO)
• LEO backup or off-duty carry
• First pistol purchase for a shooter who wants to start with a red dot

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Technical Specifications

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Compatibility Information

Optic Compatibility The A-CUT interface is purpose-built for the Aimpoint COA — this is not a standard MOS footprint. The slide is not compatible with MOS adapter plates or other optic families at this mounting depth. If you’re looking to run a different optic on the 43X, the standard MOS variant is the appropriate starting point.

Accessory Rail Compatibility The slim front rail accepts GLOCK Slim Rail-compatible accessories, including compact weapon lights and laser/light combos designed for the 43X platform. Verify weapon light fit against “Glock Slim Rail” compatible listings before purchase.

Magazine Compatibility Accepts Glock 43X/48 10-round and 15-round factory magazines. Also compatible with Shield Arms S15 15-round steel magazines (note: Shield Arms magazines require the Shield Arms S15 extended magazine release for reliable drop-free function). Standard Glock 43X 10-round magazines function normally.

Holster Fitment Fits holsters cut for the Glock 43X MOS with optic clearance. Specifically look for holsters that accommodate the Aimpoint COA or ACRO P-2 footprint. Confirm fit before purchase — not all 43X/43X MOS holsters have optic cutouts tall enough for the COA.

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TX Arms Lifetime Warranty

This firearm is covered under our TX Arms Lifetime Warranty

Manufacturer: Glock

Model: G43X MOS

Type: Semi-Auto Pistol

Caliber/Gauge: 9mm Luger

UPC: 764503073021

SKU: GLPX4350B3RM8A4

THIS ITEM MUST BE SHIPPED TO A FFL, OR PICKED UP AT TX ARMS.