From the Bench: BRN-4 M38/M27 Part 1

This guide outlines modifications for the BRN-4 platform, focusing on building a reliable 14.5-inch general-purpose rifle. It suggests using a Geissele rail and replacing an upper receiver experiencing issues. The process involves installing a 14.5-inch chrome-lined barrel with a 10-inch handguard, emphasizing practicality over excessive handguard length. Instruction comes from an experienced firearms instructor.

This video provides a detailed, step-by-step guide on how to swap barrels on a Brownells BRN-4 upper receiver, which is an HK-416 clone. It covers the necessary tools, the process of removing the old barrel and gas block, installing the new barrel, and reassembling the piston system. The guide emphasizes using specific tools like an HK barrel nut wrench and proper torque specifications for reassembly.

This video introduces the new BRN-4 Complete Upper Receiver Assembly from Brownells. It covers the components included, installation of muzzle devices and handguards, available barrel options (medium and heavy profiles), and compatibility with standard AR-15 lower receivers. The features highlighted include all-new production parts, nitride barrels with a 1:7 twist, easy maintenance via a removable op-rod and piston assembly, and compatibility with standard AR-15 charging handles.

This guide details the professional ultrasonic cleaning method for firearms, as demonstrated by Brownells experts. It covers the use of the Infante Ultrasonic Cleaner, emphasizing the importance of the correct eco-friendly solution to avoid damaging finishes like anodizing. The process involves a two-step immersion: first in the cleaning solution, then in a water-displacing oil, ensuring thorough removal of carbon fouling and rust prevention. The video highlights the efficiency for high-volume shops and the safety for various firearm components and finishes when done correctly.

This guide details the field repair of a Brownells BRN-4 rifle following a catastrophic ammunition failure. The video, presented by a professional firearms instructor from Regular Guy Training LLC, demonstrates how a blown-out case can damage components. Despite initial fears of total destruction, the instructor successfully repaired the rifle by simply replacing the damaged extractor, highlighting the resilience of the HK416 platform and the importance of proper diagnosis.

This guide details the inspection of the BRN-4's moving components and its performance during high-round-count endurance tests, particularly when suppressed. The analysis, drawing on extensive testing by Regular Guy Training, highlights the durability of the piston system and its reliable function even under extreme conditions. The insights provided are valuable for understanding the long-term operational characteristics of the BRN-4 platform.

This guide details the installation of a Geissele MK8 Super Modular Rail on an AR-15 platform. It covers securing the upper receiver, installing the barrel nut, gas system, and the rail itself, emphasizing the use of specialized tools and proper torque specifications. The process requires an intermediate skill level and careful attention to detail for a secure and functional build.

This guide, based on expert instruction from Brownells, details essential practices for proper ammunition storage. It emphasizes using airtight containers, managing humidity with desiccants, and maintaining stable temperatures to ensure ammunition reliability and safety. Proper storage is crucial for preventing corrosion and propellant degradation, especially for sensitive components like primers.

This guide details the process of upgrading an AR-15 from standard A2 furniture to Magpul components. It covers the removal of the A2 pistol grip and installation of the Magpul MIAD Grip and Magpul PRS Stock. The video demonstrates efficient assembly using specialized tools, highlighting the ergonomic benefits and adjustability of the Magpul parts. Instruction is provided by Brownells, a recognized industry authority.

This entry details the creation of a movie prop suppressor for a Remington 11-87 used in 'No Country for Old Men.' Prop master Larry Zanoff explains how the suppressor was designed to look homemade and was non-functional, with sound effects added in post-production. The process highlights the creative problem-solving involved in film armory.