The Kel-Tec RFB’s all-up weight is about 8 pounds. A FAL in the same caliber is about 9-11 pounds (depends on variant); the geometry makes the weapon far more controllable.
Something else that should be mentioned - not just the weight but the action type of the rifle can make a big difference in how recoil is perceived. While I disagree with the conclusion of the utility of 7.62 auto fire made in the below video, the description of how it relatively feels to operate the two remaining ‘big’ historic 7.62 NATO rifle types in full auto are instructive as is the slow motion footage. The G3 is known to be a violent rifle to fire to begin with as it’s a delayed blowback design; it’s interesting to compare it to the FAL’s tilt bolt system in slow motion. The FAL is clearly the more controllable (and controlled) of the two even though they’re otherwise similar.
https://www.youtube.com/watch?v=zYtx9g7BmOE
I would grab a FAL in 7.62 NATO before I’d grab an AR in 5.56 in a SHTF scenario.
Interesting.
Thank you