ExoticAR15.com
WE HAVE MADE OVER 2,100 .50 CAL UPPERS IN THE LAST 2 YEARS AND OUR'S DOESNT HAVE ANY EJECTION PROBLEMS LIKE THE 3 OTHER MANUFACTURERS OF 50 CAL AR-15"S. WE DID THE R&D AND OUR CUSTOMERS STATE OUR 50 CALS RUN BETTER THAN THE COMPANY WHO INVENTED...