A company called GWACS Armory out of Tulsa, Oklahoma has acquired the manufacturing rights, tools, dies and equipment of the Cavalry Arms CAV-15 MKII receivers. The CAV-15 MKII were a popular option for use in ultra-light AR-15 builds since their all polymer construction offers some weight savings against typical aluminum receivers.
These lowers use the same small parts as a standard receiver with the exception of proprietary take-down pins. They have an A1 length fixed stock and utilize a carbine buffer system. They will be available in a wide variety of colors (another reason the CAV-15 MKII was so popular). The CAV-15 MKII will be able to be purchased stripped with just the take down pins or as a complete lower with all lower parts (including the buffer and spring).
The arrival of GWACS Amory is also good news for owners of the original CAV-15 MKII receivers since GWACS will handle the warranty service on those lowers as well. Check out the GWACS Armory website for more information.