Yep not Aero, but ... Aero Precision BAR nut is a better solution to replace it with! :-)


https://www.aeroprecisionusa.com/ar15-bar-barrel-nut


Andrew - Lancaster, CA
NRA Life Member, CRPA member, Calguns.net contributor, CGF / SAF / FPC / CCRKBA / GOA / NAGR / NRA-ILA contributor, USCCA member - Support your defenders!