"The M16A3 is a select-fire variant of the M16A2 adopted in small numbers around the time of the introduction of the M16A2, primarily by the U.S. Navy for use by SEAL, Seabee, and Security units. It features the M16A1 trigger group providing "safe", "semi-automatic", and "fully automatic" modes." - Wikipedia Description
This mod is compatible for both Ace of Spades and OpenSpades.
Before you start downloading this mod, if you want to use it in OpenSpades, please download this version of OpenSpades(0.0.12b). Copy the weapon folders to "OpenSpades-0.0.12b-Windows\Resources\pngsight-5.pak\Models\Weapons". Copy any sights to "OpenSpades-0.0.12b-Windows\Resources\pngsight-5.pak\Gfx".