Manufacturer: Troy Industries SSIG-GBF-0MBT-00
Problem: Picatinny Railed Gas Blocks do not accomodate a same-plane aperture front sight. Solution: The Troy Industries Gas Block Mounted Front Sight. It's been a long wait, but Troy has engineered a rugged, reliable, combat ready BattleSight that mounts securely on the gas block. It offers all of the features of Troy's other Folding BattleSights: Easy to operate, clicks solidly into place and folds out of the way when not needed. (Not compatible with four-sided rail gas blocks). Made in the U.S.A.
Specifications and Features:
Mounts securely on the gas block
Offers all of the features of Troy's other Folding BattleSights
Built-in swivel attachment on both sides