The Six Day War of 1967 made apparent the need for a more rugged, versatile and low-maintenance service rifle to the IDF after experiences with the locally-produced FN FAL proved less than satisfactory.
Each ARM was equipped with an integrated folding bipod and wire cutter, a carry-handle assembly with integrated bottle-opener, and an enlarged handguard capable of storing the bipod when folded.
The model adopted by the IDF used a Teak-wood handguard (versus Polymer/plastic which would presumably overheat and melt faster) with no provision for mounting bayonets.
The initial production version of the Galil had taken a number design features directly from the Finnish Valmet, most notable being the Gas Block and Rear-Sight assemblies with night-sight provisions.
The Galil receiver was also directly copied off the Valmet; popular rumor has been that the first Galil rifles to leave the IMI factory used blank Valmet receivers before production was started in-house, though no evidence has yet come forth to confirm this.