Troy Battle Sight Front M4 Folding Tritium Gas
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Tritium Battle sights support the shooter s eyesight in minimal light situations, and this one is a rugged, reliable, combat-ready BattleSight that mounts securely on the gas block. It is easy to operate, clicks solidly into place and folds out of the way when not needed. Built-in swivel attachment on both sides. Troy's BattleSight Front Tritium Gas Block Mounting Sight is made in the US. Note: Not compatible with four-sided rail gas blocks