Check the listing for details. Fiber Optics 45 Degree Iron Offset F & R Rapid Transition BUIS Backup Sight Set. Color: Black, Condition: New. Listed at 34.99 USD. Front & Rear Offset Iron Sights With Visible Front Red Dot Sight and Rear Green Dot Sight provide the brightest aiming points in low-light conditions.Machined from lightweight and durable aircraft aluminumLow profile 45-degree orientation, no interference with primary optics/laser sightFront sight elevation adjustableRear sight elevation and windage adjustable, with 1/2 MOA click valueAmbidextrousEasy to install (tool included)Non-rust black anodized finishCompatible with most Picatinny/Weaver rails SpecificationsDimensions: 60mm x 35mm(height) x 25mm(front)65mm x 40mm(height)x 25mm(rear)Weight: 1.6 oz(front), 4.0 oz(rear)Color: Black anodized finishMaterial: AluminumInterface: Picatinny/Weaver Rails