Daniel Defense / Geissele AR15/M4 Upper Receiver Parts Bundle with Geissele MK4 10" M-LOK Rail
AR15/M4 upper receiver parts bundle featuring a Daniel Defense upper paired with a Geissele 10" Super Modular Rail MK4 (M-LOK). The MK4 rail uses a 7000 series aluminum construction with Type 3 hardcoat anodizing and includes integrated M1913 Picatinny sections at the forward end.
Included components consist of a 15" 5.56 NATO gas piston barrel marked "MP 5.56 NATO 1/7 CB", a Geissele Super 42 braided wire buffer spring and H1 buffer combo, an additional buffer and spring, buffer tube with endplate and castle nut, pistol brace, and UTG molded grip. Upper receiver does not have all parts necessary for completion; parts will need to be sourced in order to build. No charging handle or bolt carrier group provided. Provided parts compatibility is not guaranteed.