This review details the Portuguese FMP HK21, a belt-fed light machine gun derived from the H&K G3 rifle. Key differences include a specialized feed unit and a modified bolt carrier with a cam track to operate the belt feed mechanism. The HK21 maintains significant parts commonality and training similarities with the G3, simplifying logistics and user transition.
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 video highlights the Century Arms CA-3 G3 Rifle, a new offering built from authentic FMP parts kits sourced from Portugal. The description emphasizes that these are true G3 clones, notably lacking welded optics rails, and featuring original components like paddle releases and fire control kits, promising a genuine G3 experience for enthusiasts.
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