CNC machined to fit our billet 80% lowers along with the mil-spec forgings out there such as Tactical Machining, Colfax, and Rohg; they will also fit most of the popular billet lowers currently on the market. All jigs are orange anodized and come with hardened steel drill bushings and replaceable top plates to aid machining on a manual mill or CNC machine (we do not recommend modifying your 80% with a drill press). Highest Quality Jigs on the Market!
Warning: Modification of a non-firearm style casting may subject the owner to all applicable Federal, State and Local firearms laws - violation of firearms laws can result in severe criminal penalties.
Reviews on JL Billet website:
Great quality jig. Only wish there were some instruction/steps to follow.
Posted by Hawkeye on 7th Jan 2015
Just received the jig yesterday, and I can tell it's high quality. Would like to have had some paperwork or a video published to help guide the newbies. Like recommended bit and end mill sizes. Just procedural stuff to help get over being nervous about screwing up a nice JL Billet lower. Maybe even, for the future, a depth gauge for the the bits/mill.