AR15 basic functions explained

This video explains the intricate process of how an AR-15 barrel functions to propel a projectile to a target. It details the bullet's journey from the magazine, through the barrel extension and chamber, the role of rifling in imparting spin, the gas system's function, and the critical exit at the muzzle crown. The explanation highlights how different barrel materials and rifling methods impact accuracy and durability, and how gas system length affects recoil and cycling.

This video provides a detailed, step-by-step explanation of the AR-15 Bolt Carrier Group's (BCG) eight primary functions during the firing cycle. It breaks down the complex physics of gas operation, bolt unlocking and locking, extraction, and ejection, clarifying common misconceptions about how the BCG operates. The explanation is delivered with a focus on technical accuracy, making it valuable for intermediate AR-15 users.

This instructional content from Barrel & Hatchet explains how to prevent rifle over-gassing. The key is ensuring the bolt carrier group fits the barrel's breech correctly and using a quality buffer system to manage excess gas, thereby reducing sloppiness and wear on components. The instructor emphasizes that proper fit and a good buffer are crucial for optimal firearm function.

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 guide explains the function of the buffer tube in an AR-15 or AR-pattern rifle, as demonstrated by Jared from GUNBROS. The buffer tube is a critical component of the operating system, housing a buffer and spring. Upon firing, the bolt carrier group compresses this spring and buffer assembly as it moves rearward, and the subsequent expansion of the spring drives the BCG forward to chamber the next round. This process is essential for the semi-automatic function of AR-pattern firearms.

This video provides a foundational introduction to the AR-15 rifle, presented by firearms instructor John G. Johnson. It covers the identification and basic function of key components, including the adjustable stock, buffer tube, forward assist, dust cover, trigger, handguard, sights, barrel, flash hider, bayonet lug, delta ring, magazine well, safety selector, bolt catch, charging handle, and bolt carrier group. The explanation of the direct gas impingement system is also included, making it an ideal resource for new AR-15 owners.

This video provides a head-to-head accuracy test between the Ruger 10/22 and the Marlin Model 60, both chambered in .22 LR. The host, an experienced shooter, details the test methodology, including ammunition types and a consistent 25-yard range. The comparison highlights key features of each rifle, such as magazine capacity and aftermarket availability, concluding with a visual presentation of the shot groups.

This video details a comprehensive ballistics gel test for various .38 Special loads fired from a Smith & Wesson 642 snub-nose revolver. The expert instructor analyzes bullet expansion, penetration, and wound channels, offering critical insights into ammunition performance for self-defense. Key takeaways include the importance of bullet design for reliable expansion in short barrels and safety considerations for handloading .38 Special ammunition.

This guide details a head-to-head ballistic gel test comparing 9mm Luger +P and .40 S&W ammunition, as demonstrated by an experienced firearms reviewer. The test involved firing specific loads through denim barriers into gel blocks, measuring velocity and penetration, and analyzing recovered projectiles. The .40 S&W HST showed more dramatic expansion, while the 9mm +P achieved deeper penetration. The comparison highlights trade-offs between terminal performance, capacity, and recoil in compact firearms.

This video demonstrates the initial live fire of a .50 Beowulf AR-15 platform rifle, featuring a side-charging upper receiver and a Vortex red dot optic. The host, identified as a firearms enthusiast and content creator, showcases the loading process, firing, and the significant impact of the large caliber rounds on steel targets at an outdoor range. The demonstration highlights proficient firearm handling and range safety awareness.