Videos tagged with A-ZED Score

This review of the Green Mountain 12.7" AR-15 barrel highlights its lightweight profile and budget-friendly nature, suitable for general use. While the barrel exhibits minimum spec chamber and throat dimensions, its performance is significantly hampered by an oversized gas port, leading to an overgassed system and poor shooting experience. Accuracy varied considerably with different ammunition types, with match-grade loads performing better than M193.

Preston Moore conducted a comprehensive test of PMC X-Tac M855 62gr ammunition across eight different chrome-lined AR-15 barrels. The test focused on 30-shot groups at 100 yards, measuring both velocity and accuracy using advanced tools like the Garmin Xero C1 Pro and Ballistic-X app. Moore's 'A-ZED' metric provided practical accuracy insights, revealing that LMT, Krieger, and Noveske barrels generally performed best with this specific ammunition load, while Daniel Defense and Red Right Hand barrels showed less favorable results.

This review by Preston Moore details the Unrivaled Technologies 16.69" AR-15 barrel, featuring a chrome-lined, hand-lapped bore and aggressive fluting. Rigorous bench inspection and 30-shot range testing using the A-ZED scoring system demonstrate its high performance, ranking it as the top-performing chrome-lined barrel tested to date and rivaling premium stainless steel options. The barrel is optimized for reliability with a rifle-length gas system and a .107" gas port for adjustable blocks.

This video offers an in-depth analysis and accuracy test of the 16-inch Sons of Liberty Gun Works SPR Barrel. It covers the barrel's unique features like its .223 Wylde chamber, 1:7 twist rate, 3-groove polygonal rifling, and 5/8x24 threads. The review includes a borescope inspection of the internal quality, micrometer measurements of external dimensions, and a detailed shooting assessment with three 30-shot groups using different ammunition types (PMC Bronze 55gr, Hornady 73gr ELD Match, Berger 77gr OTM). The analysis focuses on mean radius, group size, velocity, standard deviation, and shooter-induced flyers. A new metric, A-ZED (A-Zone Equivalence Distance), is introduced to practically assess rifle performance at range. The video provides data-driven insights into the barrel's precision and performance.