Suppressor Handguard with Insulated Ergonomic Low-heat Design (SHIELD)

This proposal addresses the development of a Thermal Barrier Minimal Deflection Handguard for the Sig Sauer Rattler .300 Blackout weapon system and Sig Sauer SLH Suppressor. The project focuses on two main objectives: understanding the thermodynamics involved in an over-the-suppressor handguard design and creating a handguard with a tool-less mounting system. The handguard must maintain a surface temperature below 120°F during rapid fire, specifically when the weapon is fired at a rate of 1 round per second for 90 rounds with 30-second intervals between magazine changes. This will ensure the handguard remains comfortable to handle without gloves. Research will emphasize thermal conductivity, standoff distance, thickness, insulation, and material selection to achieve optimal heat dissipation and user comfort. Composite materials for inlays or surface panels will be considered to enhance insulation and reduce overall weight, thereby improving ergonomics. Insulating the suppressor's heat is crucial, and materials must withstand high temperatures without decomposing or releasing toxic chemicals. The handguard's design will also prioritize rigidity and minimal deflection. It must remain within 0.5 milliradian of the mounting center when a force of 30 pounds is applied vertically and horizontally. The proposed tool-less mounting system will facilitate easy removal for maintenance of the piston system, without requiring any modifications to the rifle. This innovation will allow end-users to maintain their rifles, reducing the risk of malfunctions and enhancing operational efficiency. The Phase I feasibility study will explore various design options and materials to meet these stringent requirements, focusing on scientific experiments and laboratory studies. The goal is to achieve Technology Readiness Level 3 by thoroughly investigating feasible solutions that can be further developed in Phase II. Ultimately, this technology will enhance the performance and safety of the Sig Sauer Rattler and other similar weapon systems, offering significant advancements in heat mitigation and handguard rigidity.