
It also has notches in it so that wire could be cut with it by firing a round. The flash hider was designed to also function as a rifle grenade launcher, compatible with NATO-standard 22 mm rifle grenades. The FR 8 was used well into the 1970s by mounted Guardia Civil units in the Sierra Nevada. Both rifles were modified to fire 7.62×51mm NATO. The FR-8 was developed from the Model 1943 short rifle, which was based on "large ring" Model 1898 Mauser action. These three rifles are often referred to as being "small ring" Mausers, as the receiver ring is smaller in diameter than the latter Model 1898 by. The FR-7 was a modification of the Model 1916 short rifle, which in turn was based on the Mauser Model 1893. The rifles were made from existing stockpiles of Mauser bolt-action rifles. The FR7 and FR8 were introduced in the 1950s when the Spanish military was already implementing the CETME automatic rifle, but did not yet have sufficient inventory to equip and train all troops. Their recoil and muzzle blast are relatively heavy. Due to their light weight, short barrel and the calibre used, The FR 7 is a variant of the "Spanish M93 Mauser" bolt action while the FR 8 is based on the "Mauser System 98" bolt action.

The "FR" stands for Fusil Reformado in Spanish ("Converted Rifle" in English). The FR 7 and FR 8 are bolt-action rifles adopted by Spain in the 1950s. Bolt system: Mauser, barrel: CETME or H&K, refitting: Fabrica De Armas La Coruñaħ.62×51mm NATO (FR7), 7.62×51mm NATO (FR8), k bulletģ diopters or notch (selectable) and front sight
