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

This video details a lot-to-lot consistency test of Fiocchi 55gr M193 ammunition. The instructor found significant variations in accuracy and velocity between different lots, impacting performance. Testing was conducted at 100 yards using two different AR-15 barrels, a 20-inch Bear Creek Arsenal HBAR and a 14.5-inch Hodge barrel, with data collected via a Garmin chronograph and Mantis X10.

This expert review by Preston Moore details a comprehensive inspection and ballistic testing of the LMT 12.5" DI barrel in 5.56 NATO. The analysis includes borescope examination of the bore, chamber, and rifling, alongside detailed group testing with various ammunition types. The instructor highlights performance metrics like muzzle velocity and A-ZED scores, offering valuable insights for firearm enthusiasts and builders considering this barrel.

This video provides an in-depth look at Beretta's new NAR (New Assault Rifle) platform, intended as the next service rifle for the Italian Army. The review highlights its development process, extensive testing under NATO AC225 standards, and key technical features. It emphasizes the platform's reliability, modularity, and ergonomic design, drawing comparisons to the AR-15 while showcasing unique Beretta innovations.

Clint Morgan discusses the relevance of short-barreled rifles (SBRs), arguing they are not obsolete despite longer barrels offering greater velocity and range for cartridges like 5.56. He highlights SBRs' advantages in close quarters, vehicle operations, and home defense due to their compact size, contrasting them with the longer barrels needed for optimal 5.56 performance. The discussion touches on specific platforms like the Mark 18 and M4, and mentions the potential for advanced accuracy from newer designs like Blackout Defense's.

This comprehensive review of the Daniel Defense M4A1 RIS III highlights its combat-proven reliability and accuracy, drawing on real-world experience from Ukraine. The video details its robust construction, including a cold hammer-forged barrel and high-quality bolt carrier group, while also noting areas for potential upgrade like the trigger. It's presented as a dependable, hard-use rifle suitable for serious tactical applications.

This review of the Styer AUG A3 M2 NATO focuses on its resurgence in popularity, often referred to as 'Die Hard cool.' The video highlights its combat-proven design, modularity with quick-change barrels, and impressive Austrian quality. While acknowledging its excellent form factor and handling, the review points out a heavy trigger pull as a significant downside. It concludes that the AUG remains a capable and desirable firearm, especially for those appreciating its iconic status and robust construction.

Preston Moore, demonstrating high expertise, provides an analytical assessment of a Criterion CORE series barrel after 15,000 rounds. He details significant internal wear, including throat erosion and fire cracking, using specialized tools like borescopes and erosion gauges. Despite the degradation, the barrel still produced surprisingly acceptable groups with specific ammunition, highlighting its durability and the importance of testing worn components.

This video provides an in-depth review and accuracy test of a Ballistic Advantage AR-15 barrel. The presenter, Preston Moore, details the barrel's specifications, including its Hensley profile, 16-inch length, mid-length gas system, and 1:7 twist rate. He conducts extensive live-fire testing with four different ammunition types at 100 yards, meticulously recording group sizes, velocities, and rifle stability scores using advanced equipment. The results are compared against Ballistic Advantage's sub-MOA guarantee, offering practical insights into the barrel's real-world performance.

This video provides an in-depth accuracy test of the Sons of Liberty Gunworks 16-inch SPR barrel, featuring unique polygonal rifling and a 5/8x24 thread pitch. The instructor conducts 30-shot groups with various ammunition types, meticulously recording data on velocity, rifle stability, and group size using advanced metrics like the A-ZED score. The results demonstrate exceptional accuracy, positioning the barrel favorably against competitors.

This video provides a detailed comparison of two BCM ELW (Extreme Lightweight) barrels, examining their manufacturing consistency and on-range performance. The presenter conducts thorough bench inspections, including gauging, weighing, and borescope analysis, highlighting potential manufacturing variations. Live-fire testing involves 30-shot groups at 100 yards with various ammunition types to assess accuracy, velocity, and consistency, offering insights into the practical performance of these lightweight barrels.