Polymer80 PF-Series Rear Rail Module (RRM) – Compatible Replacement Part for PF940 Frames

The Polymer80 PF-Series Rear Rail Module (RRM) - Compatible Replacement Part for PF940 Frames comes complete with essential parts as described: Polymer80 PF-Series Rear Rail Module (RRM) - Essential Component for PF940 Frame BuildsAs firearm enthusiasts and builders know, the rear rail module is a critical component in any Polymer80 PF940 frame assembly. This Rear Rail Module (RRM) is specifically designed to provide the precise alignment and structural integrity needed for reliable slide operation. Whether you're completing your first build or replacing a worn part, this RRM delivers the quality and compatibility that serious builders demand.Key Features and BenefitsPrecision Engineering: Manufactured to exact specifications for perfect fit with Polymer80 PF940 framesEnhanced Durability: Constructed from high-strength materials to withstand repeated use and maintain zeroEasy Installation: Designed for straightforward assembly with standard gunsmithing toolsImproved Performance: Ensures proper slide alignment for smoother operation and better accuracyReliable Function: Provides consistent lockup and ejection for dependable firearm performanceTechnical SpecificationsThis Rear Rail Module is engineered specifically for Polymer80 PF940 series frames, including the PF940C, PF940V2, and PF940SC models. The module interfaces with the frame's rear cavity and provides the necessary rail surface for the slide to travel smoothly while maintaining proper alignment with the barrel and front rail module.Installation ConsiderationsWhen installing this RRM, ensure your Polymer80 frame has been properly prepared according to manufacturer guidelines. The module should seat flush with the frame's rear cavity, and all pin holes should align perfectly. Proper installation is crucial for safe and reliable firearm function. If you're new to Polymer80 builds, consider consulting our Florida Gun Store resources or seeking professional gunsmithing assistance.Why Choose This Rear Rail Module?Not all replacement parts are created equal. This RRM is manufactured to meet or exceed original equipment specifications, ensuring compatibility and performance that matches factory components. The precise machining and quality materials make this an ideal choice for builders who demand reliability from their custom firearms.Why Buy from Florida Gun Store?FAQ: Why Choose Our Shop for Your Firearm Parts?Expertise You Can Trust: Our team includes experienced builders who understand Polymer80 platforms intimatelyQuality Assurance: Every part we sell undergoes verification to ensure proper fit and functionCustomer Support: We provide detailed product information and support for your building projectsFast Shipping: Most orders ship within 24 hours from our Florida facilityIndustry Knowledge: We stay current with ATF regulations and manufacturer specificationsCompatibility InformationThis Rear Rail Module is specifically designed for Polymer80 PF940 series frames. It is NOT compatible with other Polymer80 models (such as PF9SS or PF45) or with factory Glock frames. Always verify compatibility with your specific build before purchasing.Image ReferenceFinal ThoughtsWhether you're building from scratch or maintaining an existing Polymer80 PF940 platform, this Rear Rail Module provides the reliability and precision needed for optimal performance. As experienced builders ourselves, we understand the importance of quality components in custom firearm projects. This RRM represents the attention to detail that separates successful builds from problematic ones.CompatibilityPolymer80 PF940 Series Frames (PF940C, PF940V2, PF940SC)Part TypeRear Rail Module (RRM)MaterialHigh-Strength SteelFinishBlack OxideInstallationRequires Frame Preparation and Standard Gunsmithing ToolsManufacturer CompatibilityDesigned Specifically for Polymer80 PF940 Platform

No. This product is a part or accessory and does not require an FFL for purchase or shipping.

While Polymer80 PF-Series Rear Rail Module (RRM) - Compatible Replacement Part for PF940 Frames is legal in most states, always verify your local laws before placing an order. We comply with all state regulations.

In most cases, yes — Glock-compatible frames are designed to accept Glock OEM and compatible magazines. Always confirm fitment in the product details.

That depends on your state’s concealed carry laws. Once properly serialized and registered, carrying may be allowed under state law.

We ship all over the USA within 1–3 business days. You will receive tracking once shipped. Delivery times vary by carrier and region.