I have one marked F K. Looks like an el cheapo. Im in the process of replacing it with a Bushy upper. Can anyone help me identify the F K upper?
If it sas 'FK" -(raised letters)'on it and lightly green or blue = that is true USGI upper from the 80's. I own few of them - they are on my match rifles. Colts are either 'C' or 'CM'. FN = stensiled 'F'....all should have keyhole/ cerro forge mark on them.
I collect USGI uppers - so I am familiar w/ them. Anchor Harvey- i have only seen one in my pile. All the later FNs I have are indented 'F' and all black...some in satin finish.
A lot of the early Bushmaster rifles used true USGI uppers. Many of these A2 style uppers were floated around in civilian hands when we went to war and the USARmy went w/ flat-tops. So a lot of these A2s handles were around. Now - you dont see them as much. I have quite a few - but they are staying.