Figure 4: Sanded stock with holes drilled
(Click image to enlarge)
At the business end of the stock, you will need to drill two holes all the way through. Since the stock is plastic, you can use a hand power drill, or a drill press machine. The first hole will be about 1/2 inch (1.3 cm) away from the end, while the other hole will be 3 inches (7.6 cm) behind the first hole. You will also need to sand down the ridges, so the antenna coupler will have a secure fit.