FNC Extractor

navgunner · Aug 26, 2023

1. Is the FNC extractor the same as the one for the M249. I see an old style and an also an “improved version” but nothing that says whether or not they’re interchangeable.

2. I took my extractor out and to my surprise there was a roll pin inside of a roll pin (holding the extractor in place). Is this normal to have two roll pins? If so, does anybody know the exact sizes?

paco · Aug 26, 2023

1) yes, should be compatible.

2) old types had a 2 piece rollpin. Later version had a dedicated pin. Ask fuatos for the pins. Little chance you find those sizes in the civilian market.

navgunner · Aug 26, 2023

paco said:
1) yes, should be compatible.

2) old types had a 2 piece rollpin. Later version had a dedicated pin. Ask fuatos for the pins. Little chance you find those sizes in the civilian market.

Thank you, Paco

howdy · Aug 26, 2023

navgunner said:
1. Is the FNC extractor the same as the one for the M249. I see an old style and an also an “improved version” but nothing that says whether or not they’re interchangeable.

2. I took my extractor out and to my surprise there was a roll pin inside of a roll pin (holding the extractor in place). Is this normal to have two roll pins? If so, does anybody know the exact sizes?

The improved version uses a new style guide pin that has a 45 degree slant at the front, and the extractor itself has a matched 45 degree cut in the guide pin slot on the backside. This is to give better leverage to the extractor in grabbing the case rim.
I recently got to see the differences first hand, thanks to everybody's favorite FNC parts guy

see photos below.
The original spring gets re-used with the "improved" parts.
If M249 extractor parts are compatible, that's a cool additional source for parts, however I think M249 parts are also hard to come by and expensive.
My bolt also uses the double nested roll pin. Seems like a strange design choice to me.