RWS - Remote Weapon Station (72 ratings) Remote Weapon Station for BushMaster IMV. Comes with GPMG and .50cal weapon options. Fitting of RWS. 1. Place vehicle cupola in closed position and remove/finx hinges into place 2. if fitting with GPMG clip of weapon Butt and clip bipod into shap for trigger housing bracket. 3. Fit weapon to RWS and place onto cupola.