Glock officially announced factory 15-round magazines for its G43X, G48, and G44 pistols at the 2026 NRA Annual Meetings & Exhibits in Houston, AmmoLand News reported, with all three variants expected at dealers in May 2026. The announcement marks the first time Glock has offered an OEM double-stack option beyond 10 rounds for its Slimline carry lineup — a capacity gap that aftermarket manufacturers have been filling since the G43X launched in 2019.

The new G43X and G48 15-round Slimline magazine carries model number GL79269 with an MSRP of $32.73. Glock engineered a metal double-stack body with a radius in the magazine catch recess, preserving compatibility with the pistol's standard polymer magazine catch — no modifications, no aftermarket mag release required. The G44, chambered in .22 LR, gets a polymer double-stack 15-round magazine with an integrated load-assist roller. Glock had not published a model number or MSRP for the .22 LR variant as of press time, though street pricing is expected to fall in line with the brand's typical $25–$35 factory magazine range.

The Firearm Blog reported that Glock made the announcement through official company channels during NRAAM week, with the @GLOCKInc account confirming May 2026 dealer availability nationwide. The magazines were among the more widely shared announcements from the Houston show floor. Retailers including BattleHawk Armory had already listed the GL79269 for pre-order at street prices near $27, below MSRP.

The announcement matters to a significant segment of the carry market. Glock's Slimline series — the G43, G43X, G48, and G44 — has become one of the most popular concealed carry platforms in the country, favored for its narrow profile and single-stack-width grip. For G43X and G48 owners wanting more than 10 rounds in the factory spec, the only practical route had been the aftermarket Shield Arms S15, a steel magazine that requires a metal replacement magazine release to prevent wear on the polymer catch. An OEM Glock magazine at $32.73 MSRP that runs the factory mag release removes that modification step entirely.

The Glock press release, published on the company's U.S. website, confirmed the product names, specifications, and May availability window. Glock has not announced whether additional extended-capacity options are planned for other Slimline variants, including the single-stack G43.