My Stag Arms (circa 2006) shoots 1MOA, Sig M400 also shoots 1MOA, but both are super picky about ammo in terms of accuracy. Mispec stuff in either is typically 3MOA. Have an Accuracy Systems Inc barrel out of Byers, CO that shoots 1/2MOA, this is a 24" full bull barrel with Wylde chamber. Shoots about everything under an 1.5", needs match ammo to wring out 1/2" groups. My old National Match AR with 1996 Wilson 20" barrel shot 1" groups with iron sights and 55gr once fired Black Hills FMJ's. Picked up a Christensen Arms AR and they have a MOA guarantee - soon to be verified. In my experience the chrome lined barrels are the least accurate and ammo plays a significant part in the accuracy equation. There's lots of crappy ammo on the shelves today.
