Black Aces Tactical FS1 Flip Up Sight – Front

RAIL POSITION: Front HEIGHT WHEN INSTALLED (FLAT): ~0.47 in. FITS: All picatinny rails WEIGHT:  25 g Other Specs ELEVATION ADJUSTMENT ~1 MOA (1.131”/100 m) per click with a 14.5″ sight radius ~0.7 MOA (0.820”/100 m) per click with a 20″ sight radius *NOTE: Cannot be installed on a railed gas block due to excessive heat. The FS1 Front Sight must be mounted on a railed forend that aligns with the receiver rail.