Tracking number examples:

USPS:   9400 1116 0000 0000 0000 00   
FedEx:  7752 0000 0000
UPS:     1Z606 A5Y0000000000

The product shown is the carbine .223 version but the instructions apply for all lengths and for .308 2pc also.

- Pay particular attention to the orientation of each section.  Top section has three rails... both sections have a bevelled edge at the rear - the delta ring butts up against.    

- Round / triangle end caps require different shaped handguards (see bottom section of diagram below).   
Contact us if you have any questions.