FNAR's way too heavy to be a battle-anything, and way-er too large, also.
What? "Way too heavy for a battle rifle"??
It's a damn sight lighter than any standard infantry rifle arm our troops fielded prior to the introduction of the M16.
M1892 Krag-Jorgensen: 9 lb 5 oz empty
1903 springfield: 8 lbs 11.2 oz empty
M1 Garand: 9 lbs 8 oz empty
M14: 9 lbs 3 oz empty
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FNAR: 8 lbs 2 oz. empty.
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M16-A1: 7 lbs 8 oz empty
M4: 6 lbs 6 oz empty
It's also a lot (35%) lighter than the M24A3 rifle
M24A3 (no scope, unloaded): 12 lb 5 oz
As far as length goes, the FNAR is 37.5" long. My SCAR 17S is 38" extended (which is .5"
longer than the FNAR.)
So it's definitely not "too damn long" either!
The vast majority of guns cited above for the "field strip litmus test" either
A) Crap where they eat (AR-15, H&K
anything, etc)
or
B) Have gigantic gaping open holes for contaminates to get in the receiver (Kalashnikovs, etc),
or
C) were historically shot exclusively with corrosive ammo.
... and *had* to get cleaned every time they were used.
The guns which do not qualify for the above (such as the SCAR, FNAR, etc) really doesn't need anything other than bore cleaned in normal use, excepting every several hundred or one thousand rounds might need to scrub the piston a bit. I put over 1,000 rounds of malaysian surplus through my SCAR before I cleaned it. There wasn't enough carbon on the bolt face to smudge my finger. I put about the same through the FNAR (although, not surplus, but Varget charged hand loads) - same thing. There was literally nothing to clean when I dismantled it; and the action doesn't have much in the way of entry points for getting in from outside.
I am careful when cleaning the bore, obviously, to avoid excess fluid and residue draining in to the receiver, as a preventative measure. Not difficult to do with the magazine out, stuff a rag up under the chamber to soak anything up that happens to gets out.
Then as mentioned above, pop the guard and get the piston clean and make sure there's no buildup.
Anyway, on the the occasions I've had my FNAR (or SCAR) apart, there has been zero need to clean anything inside. Those are both clean shooting guns. Only thing I've needed to do is drop a couple drops of oil in from time to time to keep the little parts moving smooth.
If you are lazy about cleaning the bore, and let solvent or oil or contaminates drain in to the receiver, then yeah, you'll eventually have problems with carbon and other gummy components making things not work so well.
But too heavy?
Too long?
Give me a break, Barnes. Or do some pushups.