The Phoenix, Gen2 version features Polymer80's proprietary polymer composite, a solid core design, stiffened magwell and MILSPEC buffer tube housing. The pistol grip area features a unique no-thread design specific to Polymer80 lowers.   The jig is included in the price of this system The kit comes with drill bits and the end mill bit that's required to finish your AR project the right way. Instructions are online HERE.   The 80% "reciever blank" is defined by the ATF and therefore has not yet reached a stage of manufacture that meets the definition of firearm frame or receiver found in the Gun Control Act of 1968 (GCA). Parts List: Each Lower and Jig Kit comes with the following: Part Description Item Qty Per Lower 80% AR15 Lower Receiver G150 Gen2 1 Set Screw Bolt Catch Pin 3mm 1 Dowel Pin for Bolt Catch 5/8in 1 Pistol Grip Nut 3/8in 1 Pistol Grip Screw 1.5in 1 Allen Wrench 1/16th 1 Jig Parts List ITEMty per Jig 1 AR15 Jig J150 1 End Mill with laser-etched depth mark for Fire Control Pocket 7/16” end mill 1 Drill Bit, Trigger Pin Hole 5/16” drill bit 1 Drill Bit, Safety Selector Switch Hole 3/8” drill bit 1