The Ruger 90654 Magazine Well Insert Assembly is designed to work exclusively with the Ruger PC Carbine, offering a flush-fit, glass-filled polymer solution that accepts all Glock 9mm magazines for streamlined reloads and reliable feeding. Engineered for strength and durability, the black polymer construction integrates smoothly with the PC Carbines chassis to provide a natural shooting feel and quick magazine changes without added bulk. The flush-fit profile reduces snag points and enhances handling in dynamic shooting or field use, while maintaining compatibility with Rugers platform. Installation requires the 5/32" hex wrench included with the PC Carbine, ensuring a secure, proper fit so the insert remains stable under recoil. This Mag Well Assembly combines Rugers fitment reliability with Glock magazine versatility, enabling shooters to maximize ammunition options and minimize downtime during practice or competition. Crafted to complement the PC Carbines geometry, it preserves the rifles ergonomic balance and performance while delivering a clean, professional appearance. Ideal for range days, training, and field scenarios where rapid magazine changes and dependable magazines are paramount.