For anyone wanting to replace their HWS, they sent back because of the class-action lawsuit/settlement, the time may be now. EO Tech will be offering a $75 rebate on their HWS (from July 15th to November 30th, 2017). More information can be found at the link below.
http://www.eotechinc.com/rebates-promotions
http://www.eotechinc.com/rebates-promotions