Aero Precision TR15 Thunder Ranch M4E1 Stripped AR-15 Lower Receiver (Thunder Ranch FDE)
This Aero Precision TR15 lower receiver is a Thunder Ranch special edition M4E1-pattern stripped AR-15 lower marked “MULTI” with Thunder Ranch logo engraving. It is machined from an enhanced forging and designed for compatibility with mil-spec AR-15 parts.
Notable design details include a threaded bolt catch roll pin system, an upper tension screw for tighter receiver fit, increased magwell flare, a magwell cutout to aid in clearing potential malfunctions, a rear takedown pin detent hole threaded for a 4-40 set screw, and an integrated trigger guard. Includes the original box.