Jack Rowe, Master Gunsmith Series, Chamber Length Reproofing.

This guide details a thorough basic inspection process for British side-by-side shotguns, emphasizing checks for deferred maintenance and hidden issues. It covers barrel condition, proof mark verification for chamber length, rib integrity, bore measurements, action tightness, trigger pull assessment, and ejection mechanism functionality. The inspection is presented by experienced gunsmiths to ensure a firearm is safe and sound before purchase or further work.

This video demonstrates how a master gunsmith uses a specialized bore gauge to measure the internal diameter of shotgun barrels at a specific point (9 inches from the breech face). It emphasizes the importance of checking bore size and wall thickness for safety and legal compliance, particularly in regions with proofing laws. The instructor also explains how to interpret proof marks and their historical context, highlighting the differences in regulations between the UK/Europe and the US.

This video details the critical process of measuring shotgun barrel wall thickness, a key factor in determining a firearm's safety for modern proofing. Instructor Jack Rowe emphasizes a minimum acceptable thickness of 20,000ths of an inch, with 25,000ths being preferable. He also explains how to interpret proof marks, distinguishing between black powder and nitro proofing, and highlights historical practices that could lead to thinner barrels.

This video, part of the Brownells Jack Rowe Master Gunsmith Series, delves into the intricacies of shotgun chokes and barrel modifications. Master Gunsmith Jack Rowe explains the various types and lengths of chokes, contrasting UK and US standards for skeet and full chokes. He strongly advises against improper choke modification techniques, emphasizing the use of proper reamers from the breech end to avoid damaging the barrel and invalidating proof marks. Rowe also discusses the risks associated with altering forcing cones and bore sizes, highlighting how such modifications can weaken barrels and reduce their value.

This guide details how to check firearm headspace using Clymer gauges, as demonstrated by Steve Ostrem, Technical Services/Gunsmith at Brownells Inc. Proper headspace is critical for safe firearm operation. The guide covers the use of Go, No-Go, and Field gauges, emphasizing the importance of using gauges from a single manufacturer for accurate measurements. It also highlights the risks associated with incorrect headspace, such as case stretching or rupture.

This entry details the examination of a Walther PPK lacking standard proof marks. The speaker, a hobbyist, suggests this could indicate it was never issued, possibly due to factory completion at war's end, refinishing, or being a 'Lunchbox Special' – a firearm smuggled from the factory by an employee. The PPK in question is dated 1934.

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.