Adds K1 and K7 Submachine Gun as Secondary SMG

K1 SMG is the first modern firearm developed by Agency for Defense Development (ADD) and manufactured by Daewoo Precision Industries, and used by the RoK Armed Forces.
It is classified as SMG because it was meant to replace US M3 SMG. Outside on the market, it's usually designated as carbine.
K7 SMG is based of the K1 SMG, but using a blowback action rather than the gas impingement system of its predecessor. It is integrally suprressed.

Features unique barrel and magazine attachment to turn the smg into spec-ops style silent warfare weapon.
Also a Pulled Stock attachment, for increased stability.

As Always,

Requires BeardLib
Requires Custom Attachment for Custom Weapon

> Put in "mod_overrides" folder

Known Issue: