Haredened Arms Handguard for AR-Platform Rifles Shines - Combining powerful lighting technology and T-6061 aluminum, and bearing a made in the U.S.A. stamp, the LumaShark from Hardened Arms is one of the best upper receivers for AR-15 platform rifles. As a Second Amendment supporter, hunter, husband, father and a homeowner, I wanted to see how well the LumaShark would perform in different situations. Fortune shined her eyes on me when I was given the opportunity to field-test one of the patented units for the past couple months. A GREAT MATCH The LumaShark is a 12-inch free float handguard that eliminates...