This guide details the field stripping process for the HK21 light machine gun, as demonstrated by Ian McCollum on Forgotten Weapons. It covers the disassembly of major components, highlights the unique belt feed mechanism driven by the bolt carrier's cam track, and emphasizes the firearm's shared parts commonality with the H&K G3 rifle. The HK21 utilizes a roller-delayed blowback action and fires the 7.62x51mm NATO round.
The HK21 is the belt-fed light machine gun variant of the H&K G3 rifle, sharing approximately 48% parts commonality. Developed for export markets, it offered a common small arms family for nations already using the G3. Portugal was a key adopter, licensing production at FMP. While robust, its high rate of fire and recoil led to the development of the HK21E.
This live Q&A session from Small Arms Solutions covers a wide range of firearms-related topics, including specific rifle and pistol models, ammunition performance, legal compliance, and maintenance. The instructor provides expert insights on topics such as the M16A3's features, 922R compliance, the Hellion and Tavor bullpups, AR-15 component compatibility, and suppressor technology. Discussions also delve into barrel materials, buffer systems, and the pros and cons of different operating systems like direct impingement versus gas piston. The session highlights upcoming reviews for various firearms and accessories, offering practical advice for enthusiasts.
This guide details the modification process for the South African R2 rifle, focusing on replacing its original Portuguese polymer furniture. The original furniture degraded in the South African climate, leading to the development of custom, more durable components by Cote Machine & Tool. The process involves fitting wider, more heat-resistant handguards and potentially a modified stock based on the R1 (FAL) pattern. Expert insights from Ian McCollum highlight the specific issues and solutions implemented.
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