5.56mm [Part II] - M193 vs. M855 Green tip

Boondock Ballistician critically analyzes claims of 'record-breaking' 5.56mm ammunition, particularly from Shell Tech and Badlands Munitions. The expert instructor debunks inflated velocity and pressure figures, emphasizing the dangers of misinformation for reloaders and highlighting that standard brass-cased ammunition can achieve similar velocities within safe pressure limits.

This video from Palmetto State Armory's 'Suppressors 101' series, hosted by Justin, explains the critical differences between subsonic and supersonic ammunition when using suppressors. It details how subsonic rounds maximize noise reduction by staying below the 1100 FPS transonic barrier, while supersonic rounds produce an audible crack. The guide emphasizes the importance of proper ammunition selection to ensure complete powder burn and prevent malfunctions, especially with reduced back pressure suppressors.

This video features an expert discussion on three specific gripes with the AR-15 platform. The speaker, demonstrating deep knowledge of firearm mechanics and design, critiques the platform's caliber, manufacturing complexity relative to reliability, and the necessity of its buffer assembly. Despite these points, the AR-15 is ultimately lauded as a 'near perfect platform'.

This guide outlines the methodology for a suppressor durability test, as demonstrated in the video. It details the setup using a 7.5-inch AR-15, a Plan B mount system, and rapid-fire testing. The video highlights the importance of extreme safety precautions due to the high risk of catastrophic suppressor failure, emphasizing that such tests should only be conducted by trained professionals.

This video from GUNBROS critiques the concept of a Pistol Caliber Carbine (PCC), specifically questioning the value of a 5.7x28mm variant. The speaker, demonstrating experienced authority, argues that the core purpose of a PCC is cost-effectiveness and magazine commonality, typically achieved with 9mm platforms. The video contrasts this with 5.7x28mm carbines, suggesting they offer no significant benefit over a 5.56mm AR-15 while lacking the widespread ammo and magazine availability of traditional PCCs.

This guide details the installation and operation of the Silent Steel Compact Streamer QDL suppressor. It covers the differences between QD and QDL attachment systems, emphasizing the QDL's improved security with fewer threads and an additional locking mechanism. The guide also highlights the Gen 3 suppressor's performance benefits, including enhanced sound suppression and minimal back pressure, while noting its discontinuation due to an upcoming QDB system.

This video provides a visual demonstration of terminal ballistics using a clay block as a medium. It showcases the differing effects of .22 LR, 9mm Luger, and 5.56mm NATO rounds fired from distinct firearms, including a Trailblazer Firearms LifeCard, a Canik pistol, and an AR-15 equipped with a Primary Arms optic. The expert instruction highlights the comparative damage and expansion characteristics of each caliber.

This guide details the operation of the Altor Single Shot Pistol, a budget-friendly firearm chambered in 9mm Luger. It covers the unique loading, firing, and unloading procedures, emphasizing the manual nature of its operation. The demonstration highlights safe handling practices on an outdoor range, suitable for beginners familiarizing themselves with basic firearm manipulation.

This video demonstrates the basic operation of the Trailblazer Firearms LifeCard, a unique .22LR pistol designed to fold into a credit card-sized form factor. The demonstration covers unfolding the firearm, loading a single round, firing, and then folding it for storage. It highlights the LifeCard's extreme portability and simple single-shot functionality, suitable for discreet carry or as a backup firearm.

This video demonstrates fundamental firearm reloading and operation techniques for several handguns. It showcases the unique folding mechanism of the Trailblazer Firearms LifeCard, the magazine insertion and slide release on a Bersa Thunder 380, and similar operations on a CZ P-07. The instruction comes from a practitioner with smooth weapon manipulation skills.