High Profile 2 Slot Twist Lock Riser Mount out of stock PolarStar was established in 2009 Kleur:Everglade PolarStar was established in 2009 to fulfil the need for high quality Back and Side Armor can also be used with ICW style Plates and for additional protection against IEDs armor carrier In 2009 the company decided to start the Made In the USA product line New generation riser mount for rifles with Picatinny Weaver Rail 30mm long Picatinny rail with 3 slots Side plate with spring tension for quick easy installation Precision made from aircraft aluminum with matte black anodizing 25