I Badly Bent a Bunch of Barrels... with Donut

This guide details the process of lapping an AR-15 receiver to ensure proper barrel alignment for improved long-range accuracy. Instructor Stephen Caleb from Brownells explains that receiver faces can be slightly out of alignment, leading to barrel runout. The process involves using a specialized lapping fixture and aluminum oxide lapping compound with a drill to create a perfectly flat receiver face. This ensures the barrel seats flush and square, critical for precision shooting beyond 500 yards.

This guide details how to reload budget-friendly 223 Remington ammunition using Berry's 55 and 62 grain bullets and Accurate 2520 powder. It covers component selection, progressive press setup, load data considerations, field testing with a chronograph, and cost analysis, highlighting significant savings by reusing brass. The presenter, Serena, brings over 10 years of competitive service rifle experience and extensive behind-the-scenes work at Ultimate Reloader.

This guide details the process of building a retro AR-15 clone inspired by early 2000s SWAT firearms, focusing on the 'SWAT gun' build. Key elements include sourcing a police trade-in Colt AR-15, integrating a Surefire handguard with a built-in light, and mounting a 1.5x ACOG optic. The emphasis is on aesthetic authenticity and the 'cool factor' of early tactical accessories.

This guide outlines how to build an RPK-inspired rifle on an AR-15 platform. Key modifications include a 24-inch barrel for accuracy, a large muzzle brake for rapid follow-up shots, a bipod for stability, and a fixed stock for consistency. A side-charging upper is also suggested for easier reloading.

This video demonstrates an experimental modification of a 12-gauge shotgun shell, replacing birdshot with thousands of bobby pins. Through a three-part test involving water jugs, cardboard targets, and ballistic gelatin, the effectiveness and lethality of this improvised projectile are evaluated. The results indicate significant energy transfer, wide pattern spread, and penetration capabilities, suggesting the bobby pin shell is 'certified deadly'.

This guide details the installation and testing of the Unrivaled LSD, a 3D printed muzzle device that also functions as a suppressor mount. The process involves safely attaching the device to an AR-style rifle, conducting live fire to assess its effectiveness, and then attaching and testing a compatible suppressor. The video highlights the dual functionality of the muzzle device, offering a practical solution for firearm owners looking to enhance their shooting experience.

This video from DemolitionRanch, hosted by Matt Carriker, explores the capabilities of high-powered, regulated air rifles like the AirForce Texan SS and Sam Yang Dragon Claw. Carriker demonstrates their impressive power, accuracy, and surprisingly quiet operation due to integrated suppressors, highlighting a legal loophole where these airguns and their suppressors are not subject to NFA regulations. The content showcases ballistics testing and comparisons, emphasizing the expert knowledge of the host in firearms and related legalities.

This video features Nicholas Irving, a former Special Operations sniper, demonstrating and discussing various high-powered firearms. Irving, author of 'Way of the Reaper,' shares insights on sniper rifles like the Barrett M107A1 and SR-25, discusses the recoil of the S&W 500 Magnum, and tests the penetration capabilities of different calibers against an engine block. The content highlights practical applications and the effectiveness of these weapons in tactical scenarios.

This video demonstrates the dangerous consequences of firing incorrect ammunition calibers in firearms. Experienced instructor Matt Carriker shows how .380 ACP in a 9mm firearm and 9mm in a .40 S&W firearm can lead to cycling failures and severe brass deformation due to improper headspacing. The experiment highlights the critical importance of using the correct ammunition for each firearm to ensure safe operation and prevent damage.

This video from DemolitionRanch, featuring firearms expert Matt Carriker, tests the ballistic resistance of Flex Tape when used as improvised body armor. The experiment involves layering Flex Tape onto cardboard and testing its effectiveness against .22 LR, 5.7x28mm (FN PS90), and 9mm (CZ Scorpion Evo 3 S1) rounds. The results demonstrate that even extensive layering of Flex Tape is insufficient to stop common firearm calibers, highlighting the importance of proper ballistic materials.