- come with adjustment key for front sight pole (Limited) - A Sight Designed As A Low-Cost. Folding Back-Up Sight - Spring Loaded Flip-Up system, release lever can be reached on left, right & top position - Solid click sound when sights are locked into position - No need to release lock to fold - Standard Adjustable M16 Style Sight Post - Rear sight comes with Dual Apertures and Adjustable Windage - The MBUS Fits All 20mm Rail Equipped Weapons - Constructed of same DuPont Polyer material as the Famous PMAG - Magpul Authorized Products
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