Found a direct contact with DI Optical for a DCL 110 and DCL100 red dot sights for the M2HB and M249 BUT, concerned that company invoice is s scam??? Anyone doing business with them out of Santa Fe Strings, CA? Retailers are saying [product discontinued but I have an invoice with prices for two items allegedly discontinued. PAYPAL request for payment - if it's a scam will I get my $k back? Just askin!