AR-.223 1/2-28 Closed-End (.375 exit) 4 rect. slots Barrel Extender 1.75" Overall .

A-2 Style Barrel Extender;

1.75" STANDARD LENGTH;

1/2-28 TPI;

STATES LEGAL smaller diameter .375 exit hole;

4 rectangular slots- 2 and 2; blank area on bottom.

Black-oxide finish.