This is a Daniel Defense Rail known as the MK18 RIS II, model 01-004-08020-011.
Daniel Defense makes high quality firearm components for the AR Platform
Features:
Free Float
Quad Rail
This is a Daniel Defense Rail known as the MK18 RIS II, model 01-004-08020-011.
Daniel Defense makes high quality firearm components for the AR Platform
Features:
Free Float
Quad Rail