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ROCK RIVER ARMS
A4 9MM UPPER RECEIVER
ROCK RIVER ARMS A4 9MM UPPER RECEIVER
Mfr Part: 9MM0350B 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 (739-000-014); magazine adapter, action spring, and recoil buffer (080-000-442). A4 unit has flattop receiver that accepts most aftermarket accessories designed to fit a Picatinny rail.
Restrictions
- Is a 'Call to order' product.
Top takeaways
- The Rock River Arms A4 9mm Upper Receiver allows easy conversion of ARs chambered in .223 to 9mm Luger.
- It is a complete upper receiver with military specification components, including a Wilson 1-10 twist barrel and a flattop receiver for Picatinny rail accessories.
- Conversion to 9mm also requires a 9mm magazine, magazine adapter, action spring, and recoil buffer, which are not included.
Attributes
Cartridge: 9 mm Luger Colour: Black Finish: Anodized Make: AR-15 Twist: 1-10 Delivery weight: 1.86kg Shipping height: 114mm Shipping width: 114mm Shipping length: 635mm
Item details
US export classification: I(g)
Convert your AR to 9mm with the A4 Upper Receiver! 🔧 Durable, complete assembly with military specs for optimal performance.
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