21. The rifle is to be used exclusively with optical sights , as the iron sights were removed. 22. However, Aimpoint electronic optical sights are still allowed. 23. A length of Picatinny rail is installed on the carrying handle to accept various optical sights . 24. The British army fields the SA80 rifle with the SUSAT 4?optical sight as standard issue. 25. The turret also included independently stabilized optical sights and a laser range finder for manual engagements. 26. Zone plates have been proposed as a cheap alternative to more expensive optical sights or targeting lasers. 27. Only an optical sight could do it. 28. Most wartime optical sights like the Mk. 29. The rifle can also be fitted with a mounting system for optical sights and a blank-firing adaptor. 30. The B-4 FCS proved troublesome, and in some B-47Bs, it was replaced with an N-6 optical sight .
