Upper conversion unit for your complete AR-15 lower receiver designed for .25 Winchester Super Short Magnum.

Upper receiver assembly with 24" barrel.  Includes flat top upper receiver, charging handle, bolt carrier assembly, 24" button rifled barrel made from chromemoly steel, free floating aluminum handguard, picatinny gas block and a crowned muzzle.

Fully assembled headspaced and test-fired.  Includes one 7-round magazine.  The ejection port cover is not included because the port is enlarged to allow the WSSM cartridge to fit through it.