What upper do I have?

[kg4ghn]

I recently bought an AR from a friend(he bought it at a gunshow) and I am trying to figure out what upper I have.

Here is everything I can see that would be of importance:

Flattop upper, 16in barrel, bayonet lug and flash suppressor (not sure those last two matter)
keyhole marked upper (no dots)
Properly staked gas key
black extractor insert
non-m4 feedramps
Barrel stamped "5.56 Nato 1-9"
1:9 twist(from the barrel marking, obviously)
The FSB is not marked F, it is marked with a diamond shape and then 1

Any help would be appreciated. I did a search but only the only thing I can figure from the chart is it wasn't bought as a complete upper, just put together from different parts.

[ffhounddog]

The Keyhole means YHM made the upper reciever and they sell those to many customers.

Is cmv on the barrel?

[scottryan]

The Keyhole means YHM made the upper reciever and they sell those to many customers.




Wrong.

The keyhole is a forge code (Cerro) and does not say who made the upper.

[kg4ghn]

There are no markings on the barrel except for the caliber and twist.

At least not the part you can see, I haven't removed the handguards.

[ffhounddog]

Wrong.

The keyhole is a forge code (Cerro) and does not say who made the upper.

Color me stupid.

That is what I was told by a company when I asked them about my Upper.

[Copis]

Is cmv on the barrel?

What does cmv on the barrel mean?

thanks for your time

Bill

[12131]

What does cmv on the barrel mean?

thanks for your time

Bill
Chrome Moly Vanadium

[Copis]

thank you :cool: