Left handed stag arms Ar15 flat top upper receiver with dust cover and forward assist installed.
STAG 15 A3 FLATTOP UPPER RECEIVER ASSEMBLY – LEFT- HANDED
The A3 upper receiver assembly is made to mil-spec standards and includes a picatinny rail on the top, dust cover, and installed forward assist. Specs Pivot/Takedown Pin Size: Small pin – .250″ Material: Forged and mil-spec with type 3 hard coat anodizing and a picatinny rail on top