can you tell me who makes the 1/8 twist 16" M4 barrels you sell?

[Hitzy]

These guys here.
http://dlaskarms.com/collections/barrels/products/ar-15-5-56-nato-m4-16-barrel
All right.... Think I figured it out, PSA with melonite or nitride finish.... Good looking barrel, I just couldn't figure out the markings.