It's FN. They are contracted with the U.S. military for their lower receivers. Their barrels are top notch and are just generally the most sturdy and reliable AR-15s out there. INSANE QC. I love this gun. I would never let go of it if it weren't for moving out of state.
I personally outfitted the gun, upgraded the standard stock and A2 pistol grip to Magpul products. These come with the gun if you want, or I can swap it back to the standard stuff if you prefer. The optic and the light does not come with the gun. Foregrip and panels are also free to sweeten the deal. The gun itself goes about 1200 dollars in the market brand new. With the upgrade and everything, I ll let it go for 990. The gun comes with a mag. I also have a lot of pmags lying around, 5 dollar each for you.