Videos tagged with Tolerance Stacking

This guide, presented by Justin from Cerebral Firearms, emphasizes the strategic advantage of owning two distinct AR-15 builds: a compact CQB/SHTF configuration (e.g., 11.5-inch barrel) and a longer-range 'Recce' setup (e.g., 16-inch barrel). It details component selection for optimal performance, discusses the buy vs. build philosophy, and highlights the importance of ballistic testing and understanding barrel length impact on velocity and reliability. The instruction reflects a high level of technical expertise.

This video exposes critical compatibility issues between the Radian Talon 45/90 Safety and several popular AR-15 aftermarket triggers, particularly in the 45-degree short-throw setting. The speaker, demonstrating high technical authority, details how 'tolerance stacking' can cause malfunctions, with specific interference points identified on Geissele triggers. Both Radian and Geissele acknowledge the problem, suggesting the 90-degree setting or alternative safeties as solutions, but the speaker criticizes the lack of upfront consumer warnings.

This video details common mistakes when building custom Glocks, emphasizing the importance of avoiding generational part mixing and tolerance stacking. It advises starting with basic components, using quality internals, and performing a proper break-in period. The content also covers specific pitfalls in Polymer80 builds and the necessity of matching ported barrels with appropriate slides.

This expert-level guide from School of the American Rifle details how tolerance stacking can cause M4 feed ramp issues, even with high-quality parts. It visually demonstrates how barrel extension ramps can overhang receiver ramps, leading to feeding failures evidenced by copper residue. The guide outlines the diagnostic process and the necessary gunsmithing steps to correct this common AR-15 problem.