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GG Inc. Sight, Flip-Up Rear, Fits AR-15, Black, Locking Detent
The A2 Back Up Sight provides the operator with an easy to install and easy to operate flip-up rear sight and includes the all-important locking detent. 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.