Videos tagged with Taper Pins

This video details various methods for attaching AR-15 gas blocks and front sight bases (FSBs), emphasizing the superior durability and reliability of the military-standard drilling and pinning method using taper pins. It contrasts this with clamp-on and set screw designs, highlighting their advantages for home builders and hobbyists but also their potential for migration and failure in demanding conditions. The instructor stresses that for critical applications, drilling and pinning is the only acceptable method, while other methods require careful installation and mitigation techniques like dimpling and Loctite.

This video details a method for correcting a clocked or canted front sight base on an AR-15 platform rifle, specifically addressing issues found on Ruger AR-556 models. The process involves removing existing pins, using an alignment gauge to position the base correctly, securing it with Loctite 620, and then reaming and fitting oversized taper pins to the newly aligned holes. This guide is for intermediate gunsmithing tasks.

This guide details the process of disassembling a Colt 6940, focusing on the removal of the front sight base (FSB) and barrel nut. It highlights the unique monolithic upper receiver design and the challenges associated with stubborn taper pins and specialized barrel nuts. The video also touches on gas tube wear and the importance of correct tools for disassembly.

This video details the inspection of a PSA/H&R XM177 complete upper receiver, identifying two critical issues: a clocked barrel extension preventing proper seating of components and a significantly misaligned front sight base. The instructor demonstrates how to diagnose these problems using alignment gauges and component fitment, noting that headspace passes but the issues require correction. Potential solutions like oversized taper pins and proper jig use are discussed, emphasizing the importance of thorough inspection before building.

This video details a physical inspection of three Brownells M16A1 barrels, with one exhibiting a chamber issue and failing front sight base alignment. The uppers are identified as 1970s Colt. Despite the defect, the decision is made to repair the barrel due to its scarcity. The repairs involved using a Flex Hone for the chamber and re-aligning the front sight base with reamed holes and oversized taper pins. A follow-up video is promised to showcase the repair process.

This guide from The VSO Gun Channel provides expert advice on selecting and avoiding specific types of AR-15 gas blocks. It highlights the superior reliability of cross-pin front sight tower gas blocks and integrated monoblock barrels, while cautioning against clamping gas blocks and those made from aluminum. The video also details considerations for low-profile and adjustable gas blocks, emphasizing the importance of secure attachment methods and material choice for long-term performance.

This video from School of the American Rifle showcases several problematic AR-15 components submitted by viewers. It highlights issues like bolt separation at the cam pin hole, case head separation in a 9mm barrel, a broken upper receiver due to improper tool use, a damaged barrel from attempting to remove a front sight base, a malfunctioning nickel boron bolt carrier group, and a barrel with a pin drilled into the bore. The instructor emphasizes the educational value of these failures for future classes and promises follow-up videos on diagnosis and repair techniques.