2025

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Design and development of hydraulic buffer system for ar15 platform
(UMT Lahore, 2025-09-12) HAMMAD ANAS; AHMAD MAHMOOD; HASEEB SHAHID
This study presents the design and development of a hydraulic buffer system tailored for the AR 15 rifle platform, aiming to enhance recoil management and operational smoothness. Traditional mechanical buffer systems in AR-pattern rifles rely on spring tension and mass to mitigate recoil, often resulting in abrupt cyclic forces that affect shooter control and component wear. To address these limitations, a compact hydraulic mechanism was engineered to replace the conventional buffer, offering progressive energy absorption and improved damping characteristics during the bolt carrier group's rearward travel. The design process involved dynamic analysis of the AR-15’s internal kinematics, selection of suitable damping fluids, and finite element modeling of buffer components to ensure structural integrity under repeated stress. Prototype testing was conducted to evaluate recoil impulse, cyclic rate, and overall system reliability under semi-automatic and rapid-fire conditions. Results indicated a measurable reduction in felt recoil and muzzle rise, contributing to faster target reacquisition and reduced wear on internal components. The findings demonstrate the potential of hydraulic buffering as a viable upgrade for performance-oriented AR 15 systems, especially in competitive or tactical applications.