Glock G43X MOS 9mm Pistol

The Glock G43X MOS is part of Glock's Slimline series — a dedicated family of slim-profile pistols built for concealed carry where printing under clothing must be minimised. At just 25mm wide, the G43X is one of the narrowest 9mm pistols in this collection, achieving a grip width that outperforms even the standard G43 (27mm) while stepping up to a 10-round flush-fit magazine for increased capacity.

The MOS slide variant adds factory-milled slide cuts designed for specific micro-optic footprints — including the popular RMSc pattern used by Holosun, Shield, and Sig Romeo Zero — bringing optics capability to the Slimline platform. This distinguishes the G43X MOS sharply from the standard G43, which has no optics provision at all. One of four Glock Slimline models remaining in current production, the G43X MOS is a long-term investment in a preserved platform.

Important note for buyers and store listing: unlike Glock's standard MOS models (G17 MOS, G19 MOS, G34 MOS), the G43X MOS does not include adapter plates in the box. Buyers must source optic-specific mounting plates separately for their chosen red-dot sight. This must be clearly stated in the product description and on the product page to avoid post-purchase confusion. The G43X MOS is identically priced to the G26 MOS — buyers choosing between them should consider width (G43X: 25mm vs G26: 33mm) as the primary differentiator.

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