OK,
this is a very neat firearm,
a wonderful exercise in ingenuity and skill,
to show how small an M14 can get.
but,
What exactly is the tactical role for this weapon?
What is the muzzle velocity of 7.62 NATO ammunition fired out of a 16" or shorter barrel?
Once you get below approximately 18" with full powered 7.62 NATO/.308 Win ammo, the point of diminishing returns is quickly reached, with muzzle blast and flash going up, and ballistic efficiency going down.
If you want a firearm that hits like a Ruger Mini 30 ...
why not just get the lighter, more compact, handier, lighter recoiling Mini 30?
Or better yet, for maximum ballistic efficiency, keep a full length barrel on your full powered M14, and if you need a shorter, more compact delivery platform, go to a bullpup stock.
These opinions are coming from a guy who has a tremendous respect for M14 short rifles, and who has chopped up dozens of M14 rifles into 18.5" Shorties. At that length, in a wood or fiberglass stock, a shorty M14 will balance superbly. Even better, with a pistol grip folding stock, the M14 shorty becomes, IMHO, the perfect all around rifle.
as usual,
opinions expressed on the internet may be worth less than you paid for them,
and
YPMMV!
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LAZ 1