Year: 2018

United States Antimony Corporation (NYSE American: UAMY) reported successful testing of a new product, antimony tri-sulfide (also called “needle antimony” or “crudum”). The product is used as a primer component in center- fired ordnance. China has historically been the principal source of the product in the United States and most other countries. The USAC antimony tri-sulfide has complied with the military specification of MIL-A-159D. The product is now being offered to commercial manufacturers of ordnance. USAC will source the antimony ore from one of its Mexican mines and it will be transported to its floatation mill in Guanajuato, Mexico. The floatation concentrate will be shipped directly to Montana for processing. The processing cost using a proprietary method developed by USAC will be cheaper than the production of antimony metal or oxide. Additionally, the price for the contained antimony is significantly higher than that in antimony oxide or antimony metal. Besides the ordnance market, a larger market for the product is in the friction brake industry. The Company has received request for the product from Japan and Europe.

SEDENA was immediately informed of the ruling and it is expected that SEDENA will reinstate the explosives permit imminently. Once SEDENA officially reinstates the explosive permit, the Company will be able to resume blasting operations. It is anticipated that ramp up of full operations will be re-established by approximately mid-July.

The old permit was for core drilling with a man portable rig, did not allow for the construction of an access road and was due to expire on July 30, 2018. The new permit will allow for the drilling of 12 drill holes, the building of 12 drill sites 14 x 7 meters suitable for using a reverse circulation drill, and the construction 3,693 meter access road 7 meters wide in order to reach the 12 new locations.

Alonso Lujan, Vice President Exploration at Sierra Metals commented: “ Today’s press release demonstrates the existence of increased high-grade silver mineralization at Cusi with the potential for further resource development, as this area remains open at depth and along strike. The increased potential resources defined today will allow the Company to utilize the highly productive exploitation method of sublevel caving and help achieve its economic objectives at the Cusi Mine. …”