Brownells has an interesting and exclusive new product from Battle Arms Development. The Architek Fixed Front Sight Clamp-On is a compact, lightweight clamp-on front sight for .750 diameter AR-15 barrels (can be attached on any part of the barrel that is between .735 and .750″ in diameter). The Architek Sight is machined from 7075-T6 aluminum and is skeletonized to reduce its weight to a scant 1.3 ounces.
This, almost AK-47 like, front sight tower creates some interesting possibilities for extending sight radius or even reducing weight on a Dissipator-ish AR-15 build. The front sight tower is thinner than a standard FSB and has the benefit of being fixed to the barrel instead of the handguard which can deflect from sling use, barricade contact, or other factors.
Check out the Architek Fixed Front Sight Clamp-On exclusively at Brownells.