Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Falcon Industries/ERGO brings this receiver extension castle nut for M4 style receiver extension tubes.

ERGO GRIPS - AR-15/M16 M4 RECEIVER EXTENSION CASTLE NUT

AR-15/M16 M4 RECEIVER EXT CASTLE NUT
573-000-064WB
AR-15/M16 M4 Receiver Castle Nut
573000064AR-15/M16 M4 Receiver Castle Nut

Mfr Part: 4971

$5.00

In Stock
AR-15/M16 M4 RECEIVER EXTENSION CASTLE NUT