Our January Builder Set features an M4E1 set with a Spent Brass finish. These sets are hand finished by Republic Rifle.This package deal includes the finished pieces you need to assemble your own Spent Brass M4E1 Rifle, including an M4E1 Enhanced Upper Receiver, M4E1 Lower Receiver and a Gen 2 Enhanced Handguard of choice all finished in custom Spent Brass. It uses a Gold KG Gun Coat with a Black Cerakote overlay. Stand out at the range with a unique and eye catching build. This is a one time offer for this finish – once they are gone, they are gone!Includes:NEW! M4E1 Lower Receiver (included for the first time on an Enhanced Monthly Builder Set)M4E1 Enhanced Upper Receiver finished in Spent Brass. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.15″ Enhanced Gen 2 KeyMod or M-LOK Handguard finished in Spent BrassThis January Builder Set is also available in an M5E1 (.308) Enhanced configuration.Please note – These parts are individually hand finished. Although the same design and coating process is used, there may be variations between sets.