LMT’s 12" Piston Barrel vs. Reality - How Well Can an SBR Group?

This expert-level review of the Colt 6520 16" pencil barrel provides detailed technical analysis and performance data. The barrel, dated September 2003, features a chrome-lined bore, 1:7 twist, and hand-finished feed ramps. Testing with various ammunition types at 100 yards reveals its accuracy potential, with a 30-shot group of 2.123 MOA using Federal 77gr MatchKing and 3.449 MOA with PMC M855. The review also explores the impact of barrel nut torque on accuracy.

This review details the Centurion Arms 14.5-inch RECCE barrel, including technical specifications, bench and borescope inspections, and extensive 30-shot group testing. Preston Moore, demonstrating high expertise, found bore and rifling defects but noted improvements after warranty work on the crown, providing detailed performance data for various ammunition types.

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.

The 'Cheap Bastard' AR pistol from Boise Black Rifle offers a budget-friendly alternative to higher-end models like the Noveske Irregular Defense, providing comparable performance. This review highlights its key features, including a forged receiver set, 11.5-inch nitride barrel, and a mid-length gas system, all designed for reliable operation. The firearm is praised for its quality fit and finish, mild recoil impulse, and overall value, making it a strong contender for those seeking an affordable yet capable AR pistol.

This short video demonstrates basic handling and firing of a Ruger Mini-14 rifle in 5.56 NATO caliber. It shows the insertion of an extended magazine, cycling the bolt, aiming downrange in an outdoor environment, and a single shot with visible muzzle flash and recoil. The operator is equipped with appropriate safety gear.

The Honest Outlaw reviews the Palmetto State Armory 11.5-inch 5.56 pistol, highlighting its exceptional value at around $500. Despite its budget price, the firearm demonstrated impressive reliability, handling 800 rounds without malfunctions, and achieved accurate hits at 250 yards. The reviewer suggests minor upgrades for enhanced comfort but deems it a highly capable option for home defense and general use.

This extensive 15,000-round test reveals the surprising longevity of a Criterion CORE series AR-15 barrel. Despite significant internal wear, including fire cracking and erosion, the barrel maintained respectable accuracy, particularly with 77gr handloads. The test highlights how barrel degradation impacts ammunition sensitivity and emphasizes the importance of rigorous testing methodologies.

This YouTube video thoroughly tests the accuracy of a Ballistic Advantage AR-15 barrel, specifically evaluating if it lives up to its Sub-MOA guarantee. The creator shoots 30-shot groups with four different types of ammunition, analyzing the results to see if they meet the manufacturer's criteria. The video includes a detailed look at the barrel's specifications, a borescope inspection, the range setup, and a comparison of different ammunition performance, concluding with an overall results analysis and leaderboard. The central question is whether the barrel performs as expected for a Sub-MOA rated component.

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.

This video features a head-to-head comparison of two BCM BFH ELW (Enhanced Lightweight) AR-15 barrels. The creator conducts thorough inspections, including borescoping and headspace checks, revealing some unexpected findings. The testing involves shooting 30-shot groups at 100 yards with three different ammunition types: Winchester 55gr M193 FMJ, Frontier 68gr BTHP, and Federal Gold Medal 77gr SMK. Data is collected using a Garmin Zero C1 Pro chronograph and a Mantis X10 Elite, with results analyzed using mean radius and a custom A-ZED scoring system. The video aims to determine the consistency and real-world accuracy of these specific barrel models and whether any bore anomalies correlate with performance.