VLTOR AR15/M16 Assembled Modular Upper Receiver (MUR) - Hammer Forged (BLK) MSRP: $219.95 The MUR is a rigid Mil-Spec flat-top upper made to fit all AR15/M16 M4 rifles and carbines. The MUR was developed to give the customer a Mil-Spec correct upper receiver with a thicker wall, making... Qty in Cart: 0 Price: MSRP: $219.95 Subtotal: Out of stock