The initial zero is set by adjusting the weapons front sight post.When deployed in the up position, the sight cannot be folded down without depressing the spring assisted detent release button located on the left side of the base, eliminating the possibility of accidentally lowering the sight.The A2 BUIS presents a low profile when in the down position, allowing clearance for most optics.This A2 features full windage adjustment with the tactile windage knob.
This is the same back up iron sight used by elite armed forces and law enforcement teams worldwide. The A2 Back Up Iron Sight is always at the tactical ready once placed in the up position. Besides providing a low profile “ready to go' BUIS when you need it, it features include a tactile ergonomic windage knob and counter sunk crossbolt to eliminate the possibility of snags, incorporated in a streamlined body. It provides the operator with an easy to install and easy to operate flip up rear sight, and includes the all-important locking detent. The GG&G A2 AR-15 Back Up Sight is our #1 selling Back Up Iron Sight (BUIS).
