I am selling a unfired KX3 with 58x24 threads. I was going to use it on a new build it wouldn't work with the rail I picked. Oops. It is drilled on the bottom for a 1/8 pin for pinning to a short barrel.
$100.00 shipped. Partial trade for a Magpul MS3 QD single or Dual QD sling in tan.email for fastest response.