Las Vegas — Online retailer Barbell Apparel, in conjunction with International Retail Group (IRG), is set to open its first brick-and-mortar store in Las Vegas on June 8. The new store will be in the heart of Downtown Summerlin, a large outdoor shopping center owned by the Howard Hughes Corporation. Barbell Apparel was founded by a team of life-long friends and athletes who started their story by launching their Athletic Fit Jeans on Kickstarter. “A store is the next step in our plans to grow the Barbell Apparel brand,” says …