Videos tagged with Trunnion

This guide details the disassembly and internal component overview of the Chinese Type 79 SMG, drawing from expert analysis. It highlights the AK-style fire control group and the unique integrated trunnion/gas block/feed ramp component. The information is presented with a high degree of technical detail, suitable for advanced users.

This video provides a deep dive into the sheet metal upper construction of the Czechoslovakian VZ-61 Scorpion machine pistol. Mark Serbu demonstrates the intricate process of disassembling the upper receiver, focusing on the removal of rivets and the separation of the thin sheet metal from the cast trunnion. The guide highlights the unique manufacturing techniques, the material properties of the sheet steel, and the challenges involved in deconstructing this historical firearm component.

This video delves into the complexities of AK platform firearms, highlighting common manufacturing defects and build challenges. It emphasizes the importance of quality core components like the trunnion, bolt, and carrier, and warns against relying on budget brands with inconsistent quality control. The discussion also touches on the nuances of different AK variants and calibers, particularly the challenges of 5.56 AKs.

Mark Serbu, a gun designer, details the intricate process of machining tiny bicycle spoke threads into the trunnion of his BFG 58 semi-automatic 50 BMG rifle. The video highlights the challenges of working with extremely small tools and precise measurements, emphasizing the delicate nature of the thread milling operation.

This video details a rigorous swamp immersion test on the BFT47 rifle, simulating Vietnam-era conditions. The rifle underwent a 72-hour submersion followed by live-fire testing. The assessment covers the rifle's durability, finish integrity, optic functionality, and internal component condition post-immersion, concluding with a no-go gauge test to verify dimensional stability. The instructor highlights the rifle's resilience and the effectiveness of the applied finish.

This video provides a deep dive into the new aluminum extrusion handguard for the BFG 50A rifle, contrasting it with the original steel version. Mark Serbu explains the design evolution, focusing on the M-LOK attachment points, the innovative spoke tensioning system that uses bicycle spoke components and custom-made spokes, and the manufacturing process of the aluminum extrusion. The guide highlights the advantages of the new design in terms of manufacturing efficiency and modularity.

This comprehensive review by Garand Thumb revisits the Palmetto State Armory AK-74, addressing previous reliability issues. The updated model features significant engineering fixes, including a chamfered trunnion and corrected firing pin channel, demonstrating improved durability over 5,000 rounds. The rifle is also shown with Zenitco accessories, offering a competitive package at its price point.

This guide details the inspection of a Palmetto State Armory PSAK-74, focusing on potential firing pin and trunnion issues. It covers disassembly of the bolt carrier group, inspection of the firing pin and channel for debris or damage, and checking the trunnion lugs for wear. The process concludes with a headspace check using a NO-GO gauge to confirm structural integrity. This procedure is crucial for ensuring the reliability and safety of the firearm, especially following reports of primer puncturing and wear.

This video showcases the development and testing of the AK-50 prototype by Brandon Herrera. It details the transition to a stamped receiver, custom trunnion machining, and a recoil buffer system, demonstrating the firearm's destructive potential with .50 BMG rounds against various targets.

This guide details the post-endurance test inspection of a Zastava ZPAP M70, focusing on internal barrel condition, bolt and carrier wear, trunnion integrity, and a crucial headspace check using a no-go gauge. The process, demonstrated by Rob Ski, emphasizes the rifle's durability after 5000 rounds with minimal cleaning.

This guide, informed by Brandon Herrera, a recognized AK-47 expert, details the differences between AK stock types (fixed, underfolder, side folder) and the significant receiver modifications required for interchangeability. It highlights practical considerations like magazine clearance and shooting comfort, advising that owning multiple AK variants is often more practical than conversion.

This video provides an in-depth look at the August 2020 progress of the AK-50 project, a custom rifle chambered in .50 BMG. Lead designer Brandon Herrera details the evolution of the rear trunnion, comparing it to AKM and PKM designs, and introduces a novel floating trunnion and buffer system. The update covers the transition to a stamped sheet metal receiver and outlines the next steps, including machining the bolt carrier and riveting the trunnions. Herrera emphasizes the self-funded nature of the project and the avoidance of pre-orders.