TL3’s have an integrated recoil lug while Origin’s use a non-integrated, pinned recoil lug. Origin’s are also cut with standard Remington 700 feed lips while TL3’s have the option for AICS or AW magazine wells as well as the option for single shot receivers. TL3’s have options in tang thicknesses (3), rail incline (3) and different bolt/ejection port combinations while the Origin is offered with a trim tang, 20 MOA rail and only right or left hand short actions.