AR-15 HK-STYLE MICRO SIGHT SET https://gunsbuyerusa.com/product/ar-15-hk-style-micro-sight-set/ Troy Industries Sights, used by HK on MR556 rifles.  Great fit for any Rifle or Pistol platform that has a higher Picatinny height than an AR-15, such as the BRN-180 https://gunsbuyerusa.com/product-category/parts/ Rugged, flip-up sights provide failsafe backup when your primary optic or red dot...