FRBS M4D is an advanced, tritium illuminated, low-profile, durable, auxiliary front and rear sight set. The front sight post elevation adjustment and rear sight windage adjustment is easily and quickly adjusted without tools. The FRBS M4D is readily mounted on any 1913 Picatinny rail, making it ideal for use on M4 / AR-15 / M-16 platforms and on the FAB DefenseÂ® KPOS. Some distinct advantages include, a tritium light source imbedded in the front sight post along with four tritium inserts in the rear peep, ergonomic angel-wing-shaped front shroud helps create a precise optical tunnel that ensures more accurate aiming and faster target acquisition, low folded profile is smooth and inconspicuous, and will not snag on gear, webbing, or brush ,Instant spring-locked deployment mechanism will not slip, break or deform, no tools needed for easy, rapid elevation adjustments, with positive detent locking , made of extremely durable high-grade polymer and metal.
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