ARMS 38L standard length Swan sleeve for AR15 Picatinny rail in excellent condition. Flip up rear BUIS sight. Minor scratches on the screw nut heads. $100 shipped. paypal, USPS money order.
This is not the actual unit, but it is the same item. http://www.mapartsinc.com/products/2306141936_aaba1.jpg
Please email f.c.u "at" comcast "dot" net