AR-15 Quad rail Picatinny NAIT INC. Night Vision Systems » Night Vision Products » Weapon Accessories » AR-15 Quad rail Picatinny Our Free Floating AR-15 Quad Rail Picatinny Fits CAR length AR-15/M16.M4 and Variants. Aircraft aluminum, easy to install, Single piece construction, Made in the USA. AR-15 quad rail Product Options Size: -- Please Select -- 8" 6" Combination of product variants is not available Price: $59.50 Shipping: $0.00 This product has sold out. Updating...