Took off the handguard and found this on the barrel
DTI 1x9 CL 5.56 NATO
It originally came with a quad rail ... the A2 handguard is lighter and does have railsIm 95% sure that is Del Ton Incorporated. They did assemble and sell uppers, kits, and complete rifles. So this upper has the black plastic handguards? Not a aluminum free float tube?
What length is the barrel?
So, it's a Del ton upper??Yes, that is a Del ton Inc barrel, just verified on the web. From an on line ad listing:
Make: A2 Hand Guards, DTI Del-Ton Inc. Barrel, Anchor Harvey Aluminum Upper, Yankee Hill Machine brake
Serial Number: NSN
Year of Manufacture: Modern
Caliber: 5.56 / .223
Action Type: Magazine Fed Semi Automatic
Markings: The muzzle brake is marked "YHM". The barrel is marked "DTI 1x9 CL 5.56 NATO". The upper is marked with a broken "A"
So, it's a Del ton upper??