TacStar Stock Adapter for Mossberg 500/590/990 12GA

Description The TacStar stock adapter provides a means to mount AR-15 mil-spec telescoping stocks and standard AR-15 pistol grips to Mossberg 500-series shotguns. It is configured to match the factory receiver contours for a secure fit and retains proper drop for use with bead or ghost-ring sights. The adapter accepts standard AR-15 grips (without a beavertail, or those with a flexible rubber beavertail) and features QD sling attachment ports on both sides. The adapter does not include a buffer tube or stock. Key Specifications Compatible with Mossberg 500, 590 and 990 series shotguns. Caliber compatibility listed as 12 gauge. Accepts AR-15 mil-spec telescoping stocks and standard AR-15 pistol grips. Includes QD sling attachment ports on both sides for sling mounting options. Overall listed dimensions are 2.05 x 4.80 x 8.30 inches. Listed height is 2.05 inches. Listed width is 4.80 inches. Listed length is 8.30 inches. Model designation shown as Stock Adapter. Does not include buffer tube or stock; those items must be sourced separately. Engineered to integrate AR-15 ergonomics with Mossberg 500-series platforms, this adapter offers a straightforward solution for shooters who prefer adjustable stocks and AR-style grips. Its design keeps sighting geometry intact while providing the mounting interface needed for a wide range of aftermarket AR-15 stocks and grips.