Troy M4 Style Front Sight - Gas Block Height - Folding. These are rugged, reliable, combat ready Battle Sights that mount securely on the gas block.
Easy to install and to deploy, with no levers or springs to fumble with, these sights position apertures at exact factory height. A stainless-steel cross-locking system ensures sights remain upright and zeroed under extreme combat conditions.
A push of a button folds the sights securely out of the way until you need them again (they fold to a profile of just 0.460). Troy BattleSights feature a zero-canting attachment system for use on all military and aftermarket receivers. Built-in swivel attachment on both sides.