Roll the barrel into a tight tube. Wrap the cooling jacket (with holes or slots) around it. Attach to receiver.
Assemble buttstock (may have internal spacers). Attach pistol grip below receiver. gpm paper model
Fold bipod legs into V-shapes. Attach mount to front of receiver. Roll the barrel into a tight tube
Fold and glue the left and right receiver halves. Reinforce internal edges with small tabs. gpm paper model
Fold and glue rear sight (flip-up optional). Attach front sight to barrel. Glue carrying handle to top.