I haven't seen one brand new out of the box in a long time. I like those short barreled M14s. None of mine have a bayonet lug. The quality of machining looks very good in that photo.
What is interesting about the lugless (bayonet) versions is that the piston can be quickly and easily removed for cleaning; without that bayonet lug there to interfere with that removal. If you have a bayonet lug on your shorty barrel and you want to remove that piston:
* Remove / unscrew gas plug
* Undo gas cylinder lock
* slide entire gas cylinder assembly forward and turn to 3 or 9 o'clock position or sideways
* gas piston easily falls forward into your hands.
Just don't drop that piston on a cement shop floor...
Ask me how I know....
Cheers,
Barney