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This expert guide from School of the American Rifle details how to identify and replace a malformed weld spring in an AR-15's delta ring assembly. A misaligned weld spring can cause gas tube issues, leading to potential component damage. The video provides a clear visual comparison and step-by-step instructions for replacement, emphasizing proper alignment for optimal function.

This guide addresses a critical quality control issue identified by Shortshot Tony on a new Daniel Defense Mk18 upper receiver: a loose barrel nut. The video demonstrates how a hand-tight barrel nut leads to significant rail wobble. It highlights the importance of proper torque for AR-15 assembly and compares this failure to lower-tier brands, emphasizing the need for robust quality control even on premium components.

This guide details the process of lapping an AR-15 receiver to ensure proper barrel alignment for improved long-range accuracy. Instructor Stephen Caleb from Brownells explains that receiver faces can be slightly out of alignment, leading to barrel runout. The process involves using a specialized lapping fixture and aluminum oxide lapping compound with a drill to create a perfectly flat receiver face. This ensures the barrel seats flush and square, critical for precision shooting beyond 500 yards.

This guide details the installation and accessory setup for the Brownells Exclusive Mk18 Mod 1 upper receiver. It covers selecting between quad rail and M-LOK handguards, mounting optics and accessories like the EOTECH EXPS2, G33 magnifier, and Surefire RC3 suppressor. The guide also touches on compatibility with grenade launchers and the benefits of an A5 length buffer system for improved shooting dynamics, as demonstrated by an experienced instructor.

This guide details the design philosophy and enhancements of the BCM MK2 upper receiver, focusing on how BCM improved structural rigidity and strength compared to a standard M4 upper while maintaining similar weight. The instruction comes from an experienced speaker demonstrating expertise in firearm design and manufacturing.

This guide details the installation of the Blackout Defense Dual Barrel Nut System, a unique mounting solution for AR-15 style upper receivers. The system utilizes primary and secondary barrel nuts with dual taper locking to ensure bore centricity and a highly rigid barrel mount. Proper alignment of internal tapers is crucial for optimal performance.

Palmetto State Armory's 2025 Concept Gun Poll showcases a diverse range of upcoming firearm prototypes, including modular bolt-action rifles, bullpup conversions, and new caliber variants. Notable entries include the PSA Emerge, Olcan Bullpup Lower, JAKL in 9mm and .338 ARC, the Sabre Thumper launcher, and the Sabre-11 2011-style pistol. The poll allows the community to influence which designs move into production, highlighting PSA's commitment to product development based on customer feedback.

This video provides a comprehensive product update on the Palmetto State Armory X5.7, a PDW-style firearm chambered in 5.7x28mm. Expert insights cover its build materials (aluminum upper, polymer lower), features like a 40-round magazine and AR-15 style charging handle, and technical specifications including a 1/2x28 threaded barrel. The update confirms tooling is underway for a Summer 2025 launch.

This video from Palmetto State Armory showcases several pre-production concept firearms unveiled at Shot Show 2024. PSA is actively soliciting customer feedback via their website to determine which models will proceed to production. The featured firearms include innovative designs like the VUK rifle, the Thumper 37mm launcher, various Dagger pistol variants, and the X5.7 PDW.

This video provides an update on the Palmetto State Armory X5.7 pistol, detailing design refinements and production timelines. Cameron from PSA highlights improvements like an ambidextrous safety, last round bolt open, and Glock-compatible sights, while retaining features such as the Radian Raptor charging handle and 40-round capacity. The design is finalized, with production slated for Q1 2025.