Note: I own a Garand and a FAL. My dad owns a M-14 and a HK-93. I've fired the G-3 however.
M1 - Probably the most accurate and the best sites. The 8 round clip is a pain, both to load and to carry. Too heavy compared to the others.
M-14 - Suffers from weight. Nothing really wrong with it, just that the others are better. And it's just brutal on full-auto.
G-3 - I never liked the HK's that much. I don't like the bolt handle being up front and I'm not that big of a fan of the rear sight. I have friends who are FLEO's and they swear by them. Dunno, they just never did anything for me.
FN-FAL - The cream of the crop in my opinion. I've fired thousands of rounds through mine and others and cannot remember a single jam. Simple to clean. Decent weight, not too light to aim and not to heavy to carry. I prefer the .308 to the .223. I also like the simplicity of the Accurate out to 300 yards with the flip-up rear-sight. Can easily shoot farther with a scope, but you probably don't need it in most combat situations. Anyways, I could go on, but that would just be cumulative
