Is an AR15 Direct Impingement or Internal Piston? DI, External/Internal Piston Explained

Amber and Doshie from Exile Armory showcase a wide array of new firearms and accessories. The video features various pistols, rifles, shotguns, and suppressors from brands like FN, Q, Bergara, Springfield Armory, and Beretta, with detailed pricing and some technical specifications provided. The presentation is casual and informative, highlighting new inventory for customers.

This video from Polenar Tactical briefly showcases an FDE AR-15 style rifle equipped with a suppressor and optic. The visual evidence is limited to a static display on a shelf, offering a quick glimpse of the firearm's configuration.

Exile Armory LLC presents a diverse selection of firearms and accessories, featuring a wide range of handguns, rifles, and shotguns from various manufacturers. The video highlights specific models like the Sig M18 9mm, Mossberg 590, Colt SBR, and Springfield Saint Victor, along with pricing details. It also touches upon suppressor sales and gun shop etiquette for safe handling and presentation of firearms.

This review of the BRN-4 highlights its external piston system, addressing common AR-15 criticisms like carrier tilt. The speaker, drawing on military experience with machine guns, discusses the advantages of this design, particularly in comparison to traditional AR platforms and AK-47 logistics. The primary drawback mentioned is a slight weight increase.

This review assesses the market viability of the Brownells BRN-4, an HK416-style piston AR-15, against modern direct impingement alternatives. The speaker, demonstrating high authority, argues that piston systems offer distinct advantages, particularly when suppressed, by mitigating gas blowback through the receiver. He also debunks common criticisms regarding reliability and weight, framing the piston system as a practical and robust choice for modern firearms.

This YouTube video explores the effectiveness of iron sights versus optical sights on firearms. The title suggests a comparison or discussion, implying that both aiming methods have their merits. The content likely delves into the pros and cons of each, potentially covering factors like speed, accuracy, durability, and intended use cases. Viewers can expect insights into which sight system might be better suited for different shooting scenarios, whether for general shooting, competition, or defensive purposes.

This video critically analyzes the M14 rifle, arguing its failure stemmed from the US Ordnance Corps' insistence on the 7.62x51mm NATO cartridge over superior intermediate rounds. The speaker details how political and traditionalist influences, including the alleged sabotage of the AR-10, led to the M14's adoption despite its shortcomings in combat, particularly in Vietnam.

This video meticulously details the M16's troubled introduction in Vietnam, tracing issues from early design flaws and procurement politics to ammunition choices. It highlights how non-chrome chambers, incorrect twist rates, and the switch to ball powder exacerbated reliability problems, contrasting with the later M16A1's successful fixes like chrome lining and proper maintenance.

This video delves into the critical role of AR-15 buffers, explaining their function in managing bolt carrier bounce and ensuring reliability across various conditions. It details the evolution from early rifle buffers to specialized H, H2, and H3 carbine buffers, highlighting the use of tungsten for increased mass. The content also covers unique applications like 9mm blowback systems and provides practical advice on buffer selection for different firearm configurations.

This video debunks common myths surrounding the Beretta M9/92FS, detailing its history, military trials, and technical evolution. It addresses slide failures, attributing them to ammunition and high round counts, not design flaws. The review highlights improvements in locking blocks and magazine reliability, emphasizing the M9's enduring capability and safety features.