WWSD: GWACS Lower Receiver

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3y Nov 11, 2017

Nothing has generated more controversy around the WWSD project than our choice of the GWACS Polymer lower receiver.

Well, nothing besides the lack of BUIS, pencil barrels, a Holosun optic, chosing a 14.5" barrel for the carbine, chosing a 18" barrel for the rifle, using an expensive carbon fiber float tube, using an expensive charging handle and, of course, the lack of a forward assist.

The GWACS (previously CavArms MK2) lower is the best of breed polymer lower on the market and the only one we'd consider for this project.

It's not perfect, however, and we discuss both the benefits and detriments of it in this WWSD video.

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InRange is an online video program dedicated to the study of guns, shooting, gun culture, and history. We dispel the myths, promote the good stuff that hasn't gotten the attention it deserves.


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