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Complete 300BLK AR's available on our website at $2099.

Anything 12.5" and over is fine on an A2.

Not at this stage. Ive been told the 300blk is only made in longer barrel lengths to meet the requirements of the US and export market.

Something like the NEA Compact Carbine stock would be nice. C-Cat though, unless you had a really loooong barrel.
http://www.neaginc.com/uploads/1/4/8/3/14839896/nea15_catalog_pg9.pdf

The 300blk with a servo stock, just over legal length.
http://i51.photobucket.com/albums/f392/we34gde4/photo_zpsbc9de67b.jpg

NEA 300BLK Uppers now in stock. These are a 12.5", Pistol Gas, 9" latest generation rail upper. The upper is complete with BCG etc ready to be dropped onto your lower.
NEA-15 12.5 300blk Upper...