GBRS x Proof Research

This YouTube video focuses on carbon fiber barrels for firearms. It will likely delve into the material's properties, advantages, and potential applications in firearm design and manufacturing. Expect discussions on weight reduction, stiffness, and performance benefits compared to traditional barrel materials. The video may also touch upon different types of firearms that can utilize carbon fiber barrels, such as rifles and pistols, and the impact on shooting accuracy and recoil management.

This entry details the unique XR-86 custom rifle, a 1986 build by Wilfred Ellis. It masterfully combines components from an M60 (flash hider), an M14 (gas system), and an AR-15 (trigger, bolt, locking system). The AR-15 trigger is notably rotated 90 degrees, and its bolt is integrated with the M14 gas system, showcasing advanced gunsmithing.

This video from School of the American Rifle highlights critical manufacturing defects in AR-15 bolt carrier keys, specifically focusing on rough internal bores. Lead instructor demonstrates how a poorly finished carrier key can cause significant friction, premature wear on components like gas tubes, and operational issues, contrasting a problematic new Colt carrier with a well-functioning older model. The expert emphasizes the importance of a smooth bore for reliable function and longevity of expensive parts.

This guide, presented by an expert firearms instructor, details the benefits and installation of adjustable triggers for platforms like the AR-15. It covers understanding trigger mechanics, adjusting pull weight, reset, and overtravel, and highlights ideal users for these components. The instruction emphasizes safety and practical application for competition and precision shooting.

This guide, presented by School of the American Rifle, details how to identify and replace a malformed weld spring in an AR-15 Delta Ring assembly. A misaligned weld spring can cause the gas tube to be pushed off-center, leading to excessive friction or damage to the carrier key and gas tube. Replacing the faulty component ensures proper gas tube alignment and firearm reliability.

This video provides a comprehensive, step-by-step guide to building a .300 Blackout AR-15 pistol. Caleb from Brownells walks viewers through the entire process, from selecting top-tier components from manufacturers like Aero Precision and Sons of Liberty Gun Works, to detailed assembly of the lower receiver, upper receiver, gas system, and the installation of accessories such as optics and lights. The guide offers valuable tips on essential techniques like staking castle nuts and setting torque specs, making it an ideal resource for both novice builders and those seeking to learn more about AR-15 customization.

This video demonstrates universal shooting standards, emphasizing under one-second engagement times from high and low ready positions. It showcases drills like the Bill Drill and a 3 Body, 2 Head sequence, highlighting efficient weapon manipulation and accuracy with a custom AR-15 build featuring an EOTech optic and GBRS Hydra Mount.

Proper posture while wearing body armor is crucial for maximizing ballistic protection. Leaning forward exposes the clavicle and upper chest, allowing rounds to bypass plates. Standing upright and bracing ensures the armor plates are presented directly to the threat, covering the vital areas effectively.

This GBRS Group video emphasizes mastering carbine reloads by prioritizing proper technique over raw speed. It highlights the critical importance of a firm, forward support grip (like a C-clamp) for weapon control during CQB and high-stress scenarios, warning against sacrificing fundamentals for fast 'par times'. The correct sequence involves sending the bolt, moving the support hand forward, establishing a solid grip, and then re-acquiring the target.

This performance review showcases advanced tactical training integrating high-intensity physical and mental stress. Drills include live-fire range exercises with rapid transitions, CQB in a shoot house under fatigue, and simulated combat stress via intense cardio intervals. The session emphasizes the critical link between physical conditioning, stress management, and effective weapon manipulation.