Lwrc Uciw Ultra Compact Stk Kit

The LWRC UCIW Ultra Compact Stock Kit is a purpose-engineered receiver extension assembly designed to reduce overall weapon length by a full inch compared to standard AR-15 collapsible stock systems. This complete stock kit includes a compact receiver extension buffer tube, receiver end plate, shortened recoil buffer, recoil spring, and castle nut—all engineered as an integrated system for reliable, synchronized operation. The UCIW platform delivers measurable length-of-pull efficiency for operators requiring compact profiles without sacrificing buffer spring dynamics or recoil management.

Weighing only 1.31 lbs, this ultra-compact stock assembly maintains a lightweight footprint critical for patrol weapons, close-quarters configurations, and vehicle-mounted platforms. The shortened recoil buffer and matched spring assembly preserve proper bolt carrier velocity cycling while functioning in the reduced tube envelope. Integral sling attachment points are incorporated into the design, eliminating the need for aftermarket QD solutions and streamlining the platform. LWRC's component matching ensures that installation of the entire kit as a system prevents timing mismatches that can occur when mixing proprietary stock components with standard AR-15 parts.

This kit suits operators and units prioritizing compact rifle configurations for tactical environments where stock length directly impacts maneuverability. Law enforcement carbines, specialized response teams, and defensive platforms benefit from the inch of recovered length. The UCIW system is particularly relevant in vehicle operations, close-quarters battle scenarios, and configurations where standard collapsible stocks create clearance or ergonomic constraints. Dimensions of 5.5 x 2.5 x 12.5 inches reflect the compact design philosophy while maintaining functional buffer tube geometry.