Upper Receiver for M4

An upper receiver made entirely of nylon-reinforced polymer for AR15 replicas. The set includes a forward assist and a steel shell ejection window flap.

Original Spare Parts offer of products includes a wide variety of both internal and external spare parts for Specna Arms replicas. They are exactly the same high-quality parts as the ones used in the production of serial Specna Arms replicas. Original Spare Parts products are useful to owners and users of Specna Arms replicas as well as repairmen.