
Conversions included new barrels, inserted spacers in magazines (to accommodate shorter rounds), shortened forends and new iron sights. The FR-8 rifles were converted from Spanish Model 1943 rifles, which are based on Model 1898 Mauser action, also known as “Large ring” Mauser action. The FR-7 rifles were converted from Spanish Model 1916 rifles, which are based on Model 1893 Mauser rifles, also known as “Small ring” Mausers. The FR letters stand for “Fusil Refromando”, and both FR-7 and FR-8 rifles are conversions of the earlier Mauser type bolt action rifles, which were in abundance at the time because of adoption of new, more effective guns. The FR-7 and FR-8 rifles were developed during late 1950s in Spain during their transition from military bolt action rifles to new, select-fire CETME Mod.58 assault rifles, chambered for then-new 7.62×51 NATO ammunition.
