Videos tagged with Gas Port

This guide details how to properly tune a suppressed AR-15 direct impingement system to prevent damage. The VSO Gun Channel instructor, demonstrating high authority, explains that suppressors increase dwell time and pressure, often exacerbating factory over-gassing. The process involves a two-step adjustment: first, a coarse adjustment using heavier buffer weights or BCGs, and second, a fine adjustment with an adjustable gas block to achieve optimal cycling and a 3-4 o'clock ejection pattern.

This video provides a physical inspection of an IWI Zion-15 AR-15 rifle donated for the School of the American Rifle's 10-year anniversary. The inspection revealed the rifle is well-gassed for commercial and NATO ammunition, with a mid-length system and a 0.078-inch gas port. Minor modifications were made, including replacing the extractor spring with a Sprinco 4-coil and adding Rocksett thread locker to the barrel nut screws, which were torqued but lacked initial thread locker.

This video provides an in-depth look at recent product updates and new offerings from Lead and Steel. Key highlights include modifications to their LP1 optic for improved security and user identification, the development of a direct RMR to Acro adapter for the Pandora optic, and enhancements to their AR-15 bolt carrier group for increased durability and reliability. The discussion also covers their upcoming AK-47 builds, emphasizing quality components and meticulous assembly.

This video explains the concept of 'dwell time' in direct impingement (DI) AR-style rifles. Dwell time is defined as the duration from when a bullet passes the gas port until it exits the barrel. This duration significantly influences the amount of gas pressure built up, which in turn affects the gas port size and the overall operation of the rifle. Understanding dwell time is crucial for tuning a rifle, especially when using suppressors, which can increase back pressure and lead to overgassing.

This video details Daniel Defense's proprietary hammer forging process for creating high-quality rifle barrels. It explains the journey from raw bar stock through gun drilling, CNC profiling, hammer forging to impart rifling and strength, chambering, and final assembly with barrel extensions and gas ports. The process emphasizes mechanical hardening and molecular condensation of the steel, resulting in more durable and accurate barrels.

Mark Serbu discusses the development of a piston system for the BFG-50A, moving away from direct impingement due to alignment issues. He highlights the challenges of a stuck, corroded original piston system and introduces a new, smaller piston design. The video also showcases unusual bolt carrier bounce and hammer behavior observed during testing of the piston system, even without a return spring.

This guide details the proper alignment of an AR-15 gas block, emphasizing that perfect centering is often unnecessary due to oversized gas block holes. It covers the debate on gas block gap, demonstrates alignment using a digital borescope, and provides recommendations for modern builds using clamp-on or set-screw blocks. The information is presented with professional authority by Caleb from Brownells.

This live Q&A session from Small Arms Solutions covers a wide range of firearms-related topics. The instructor, demonstrating significant expertise, addresses issues with Sig AR pistols, discusses the Chris Vector's ergonomics, and analyzes the potential for 5.56mm round development. He also provides insights into the 300 Blackout cartridge, the PSA KS47's performance, and the Benelli M4 shotgun's combat-proven status. The discussion extends to ammunition quality, manufacturing challenges for retro AR parts, and the debate between nitriding and chrome lining for barrels.

This video provides an unboxing and review of the Teslong NTG100 digital borescope, demonstrating its use for inspecting firearm barrels, rifling, gas ports, and locking lugs. The instructor highlights its 48-inch semi-rigid probe, adjustable LEDs, and compatibility with PCs and smartphones via USB or USB-C. Key features discussed include the importance of probe diameter (0.2 inches for 223/5.56) and adjustable mirror attachments for achieving proper depth of field. The review also includes a giveaway for a second unit.

This expert-level guide from Brownells explains AR-15 dwell time, a critical concept for builders and troubleshooters. Dwell time is defined as the duration gases from a fired cartridge act on the firearm's operating system, specifically the bolt carrier group. Understanding its relationship with gas system length and gas port proximity is key to diagnosing and preventing malfunctions.

This live Q&A session covers a wide range of firearms topics, including magazine recommendations, rifle component compatibility, historical firearms analysis, and ammunition availability. The host, a firearms instructor, discusses specific models like the Duramag, LWRC rifles, FN's production of M16s/M4s, and the Beretta ARX. He also addresses common concerns such as AK vs. AR reliability, the impact of barrel length on ballistics, and the current ammunition shortage.

This live Q&A session from Small Arms Solutions features discussions on various firearms topics, including the CZ acquisition of Colt, specific firearm components like Smith Enterprise bolt carriers, and advice for beginner AR-15 owners. The hosts also touch upon firearm maintenance, legal considerations, and personal experiences in the firearms industry. The conversation highlights the importance of quality components and informed purchasing decisions.