Rock River Arms A4 9mm Mid-Length Complete Upper Receiver

$575.00 $399.99

Buy Now

SKU: 2175200556080397 Category:


Sub-caliber upper assemblies allow fast and simple conversion of ARs chambered in .223 to 9mm Luger. True, dedicated, complete upper receivers are assembled from military specification components; includes a Wilson, 1-10 twist barrel, bolt and carrier, charging handle, shell deflector, heat-shield lined handguards, sling swivel, and A1-style flash hider. Additional items not included but required for conversion to 9mm are a 9mm magazine (078-000-320); magazine adapter, action spring, and recoil buffer (739-000-016). A4 unit has flattop receiver that accepts most aftermarket accessories designed to fit a Picatinny rail. Mfg: Rock River Arms SPECS: Barrel – 4140 steel, blue, matte finish, 16″ (40.6cm) long, .725″ (18cm) O.D. Receiver – Aluminum, anodized finish, matte black. Designed to fit lower receiver with .25″ (6.3mm) diameter takedown pins.

Additional information




There are no reviews yet.

Be the first to review “Rock River Arms A4 9mm Mid-Length Complete Upper Receiver”

Your email address will not be published. Required fields are marked *



Join Us And Never Miss Any Of The Latest Tips, Tricks, And Updates.

You have Successfully Subscribed!

Pin It on Pinterest