Info from A.R.M.S:
5.56 cal. 14" and has the #40™ rear flip up sight built in.
U.S. Patent No. 5,142,806 & 5,533,292.
Item: #38™ S-Ex
$180.00 + shipping
Sitting on my 6.8
Bought this for my SPR and decided to go with Larue SPR Scope mount instead.
$170 Shipped/OBO. MO only.
First "I'll Take It" follow by IM with shipping info gets it.
Check my feedback if you must +32
Thanks for looking !