The FBS front sight is elevation adjustable and can be mounted on all 1913 picatinny rails, but is specialty made for the M4 / AR-15 / M-16 platform and the K.P.O.S.
Very low profile & slim design
Can be used as primary or back-up sight
State-of-The-art ergonomic & ambidextrous design
All manual configuration, no tools needed for elevation adjustments
Durable high grade polymer & metal construction
Spring based locking mechanism - will not break or deform
Compatible with all 1913 Picatinny rails