I took the ill-fitting handlebar cover off. On my saw it is marked on the inside with "PA6-GF", and "30/PA6". The fault seems entirely with the bar cover. The inside top boss, through which the upper fastener inserts, is positioned a bit too low. A tiny die change at the manufacturer's would easily correct the misfit. The lower boss could also benefit from repositioning, but it seems less the problem than the top boss. I carefully trimmed back the edges of the top part of the cover a millimeter or so, shortened the boss a trifle with a small belt sander, and now the piece fits much closer to the handlebar. This is the kind of trivial project one can do when it is unseasonably cold outside. Everything else on the saw fits sufficiently well to please me.
I weighed the saw new, without fuel or oil as it came out of the box. It weighed 11 pounds, 6 oz. without bar, chain, side cover, or side cover nuts. With just the side cover and nuts added, the saw weighed 11 pounds, 10 oz. The scales were accurate, state tested and state certified, 50 pound scales. Official weight data misleads a bit.