Posted 16 Jun 2016 (edited) New-unused original factory .5x36 fixed adapter for 9mm M16 / AR15. Colt 9mm AR15s and most others are .5x36... a few aftermarket 9mm barrels may be different. priced reduced to $70 plus $5.00 USPS Priority mail. USPS Money Order preferred. J43151C@comcast.net Edited 9 Jul 2016 by Frank Iannamico SOLD Greensburg, Pennsylvania, United States Share this post Link to post Share on other sites