This is what 2A Armament says:

 

 

The Gen 2 Balios-lite 16" 5.56mm complete upper receiver offers the end user an assembled system that is ready for lightweight needs. Each assembled upper starts with a Balios-lite stripped upper receiver. We then add our titanium gas block on the appropriate length barrel, and finish the assembly with our Gen 2 Balios-lite rail, titanium barrel nut, and our titanium T3 compensator.  Our proprietary rail attach system does not need timing, provides for an extremely solid lock up and tight joint to the upper receiver, and has recessed fasteners for smooth, clean feel.  Our full mass carrier is included as well as a BCM-Mod4 charging handle.

    Barrel Material:  416-R Stainless Steel with QPQ Nitride finish
    Twist Rate: 1:8 inches
    Muzzle: 1/2 x 28 thread
    Carrier: Full mass QPQ Nitride body, and gas key, Stainless tail
    Bolt: 9310 QPQ Nitride body and extractor, Cryo'd, MP tested
    7075 enhanced charging handle BCM-Mod 4
    Includes titanium T3 Comp

 

Balios-lite 16 5.56mm Gen 2 Complete Upper

$1,299.00 Regular Price
$1,201.58Sale Price

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