The Ghost Firearms Upper Receiver, Pistol Lower Parts Kit, .300 Blackout are Billet Aluminum.
The inner diameter of our hand guards is 1.365” and will not house most suppressors as their outer diameter is typically 1.50” or greater.
This item does not come with the BCG or the charging handle.
Our Ghost Firearms hand guards have M-LOK slots on the sides and bottom for accessories and 1913 pica tinny on the top of the rail.
Yes, they do appear to be the mil spec option.
You will need a lower receiver, buttstock.
Our lower parts kits come standard with a mil spec AR15 trigger with 5lbs of trigger pull.
The handguard has a 1.365" inside diameter. It includes a pistol buffer tube.