
Originally Posted by
Ustauk
A lot of the weight savings on the WWSD is the polymer lower, which also includes a pure plastics stock and eliminates the need for an aluminum buffer tube. It took them a lot of time to get the polymer lower right, and the failures of the original polymer lower of the AR180B can tell you what can go wrong. It would be interesting to see someone like SBI see if they could one day 3D print a lower receiver with either the 1913 on the back or a built in plastic 180 reproduction stock, maybe screwing together two halves like with the Jard J180 lower, but I'm not sure if 3D printing is at the point of being strong enough to make a workable lower, or if the weight savings would even be worth the effort in development time, printing time, and material cost.
The WWSD also uses a carbon fiber handguard to reduce weight. As nice as that would be, the rifle is expensive enough in Canada without that, so that's a logical place to keep using a traditional aluminum hand rail.