Board Thread:Forum Games/@comment-31503594-20171013121527/@comment-30868172-20171013184644

This is a variant of the special purpose weapon adopted by USSOCOM. The program, which led to both the Mk 46 and Mk 48, was headed by the  US Naval Special Warfare Command (NAVSPECWAR). Like the SPW, the barrel changing handle, magazine insertion well, and vehicle mounting lugs have been removed to save weight. However, the Mk 46 retains the standard M249 plastic buttstock instead of the collapsible buttstock used on the SPW. The Picatinny rail forearm differs slightly from the SPW. The Mk 46 has the option of using the lighter SPW barrel or a thicker, fluted barrel of the same length. [56]