11. The lock / release mechanism was located beneath the front sight . 12. These rifles feature an adjustable ghost ring rear sight and winged front sight . 13. The sight radius is 218 mm ( from rear to front sight ). 14. The adjustable front sight could be lost if the retaining screw wasn't tightly secured. 15. The change in impact height from one front sight to the next is at. 16. The Weaver-style rail incorporates a fully adjustable rear sight and a removable front sight . 17. Front Sight acquired an extensive property on the Kenai Peninsula in Alaska in 2004.18. Front Sight Alaska has very little onsite development at this time except the ranges.19. The M16A1 front sight base was removed and replaced with a DPMS gas block. 20. Glare, particularly from the front sight , can be a significant problem with iron sights.
