ONE TIME OFFER: Our 80% lower jig kit is made to aid those who do not have a CNC machine. This can work with a router or a milling machine. This Jig works for both AR-15 and AR-9 lowers. Comes with three top plates that are interchangeable to allow you to mill the fire and control group and comes with instructions to help you properly finish your 80 percent lower receiver. This Jig Kit goes for $150 today you SAVE 46% and get it for $70.