FNC bolt differences

[geavlaw]

Guys:

Slightly off topic, but please bear with me. We have FA and SA versions of the FNC. Recently noticed that the gas selector seems to have a total of four positions. With the original FN hand guard it is not overwhelmingly obvious because the guard prevents the selector from going all the way into the first and last "detents". However, going to a hand guard with more room allows the selector to go into four distinct positions, basically 9, 10, 2, and 3 o'clock. Always thought there were two positions, normal and enhanced for more gas if the system was compromised.

Does anyone have any idea what is going on with the first and last detents? Both the SA and the FA gas selectors seem to have the same attributes. Have not had a chance to test at the range and see what difference it makes. Any thoughts, comments, or suggestions would be greatly appreciated.

Thanks!

 

[okpud]

Guys:

Slightly off topic, but please bear with me. We have FA and SA versions of the FNC. Recently noticed that the gas selector seems to have a total of four positions. With the original FN hand guard it is not overwhelmingly obvious because the guard prevents the selector from going all the way into the first and last "detents". However, going to a hand guard with more room allows the selector to go into four distinct positions, basically 9, 10, 2, and 3 o'clock. Always thought there were two positions, normal and enhanced for more gas if the system was compromised.

Does anyone have any idea what is going on with the first and last detents? Both the SA and the FA gas selectors seem to have the same attributes. Have not had a chance to test at the range and see what difference it makes. Any thoughts, comments, or suggestions would be greatly appreciated.

Thanks!

geavlaw, there are only two gas positions, but the selector will rotate past them if the handguards are removed. This is for removal of the gas tube for maintenance/cleaning. What you are feeling is probably not extra detents, but the end points of the tube's rotation. If you look on the gas block where it meets the gas tube, you'll see a little gas vent hole. When the gas tube is in the "normal" setting, this hole is visible and vents some gas from the system during firing. When set to "adverse" mode, the gas tube rotates to cover this hole, forcing more gas onto the piston by not bleeding any through this hole. Scroll down to figures 12-14 of the operators manual and you'll see what I mean about removing the gas tube -> http://stevespages.com/pdf/fn_fnc.pdf

 

[geavlaw]

Okpud:

Thanks so much for the great explanation! And the link! We very much appreciate it, and will check them out during the next range trip. Thanks again!

 

[rhandle]

I have the REAL armorers manual that sold here for $800 plus dollars . I took it to Kinko s and another copy center to copy it so i can see but they both refused. Some day i will get around to copying it myself

 

[rhandle]

sorry that last post was meant for someplace else

 

[rhandle]

I have the REAL armorers manual that sold here for $800 plus dollars . I took it to Kinko s and another copy center to copy it , but they both refused. Some day i will get around to copying it myself

 

[rhandle]

as well as the last one LOL im hungover

 

[paco]

possibly not the best idea to copy.
A) your value drops 1000%
B) illegal to do (copyright)
C) Belgian Army or FN might be pissed off ; )

Keep it for youself, my 2 cents

 

[sweersa]

I made a near perfect copy of a rare HK XM8 draft manual. Down to the red card stock paper covers, and spiral binding. Nearly indistinguishable from the few originals out there. I sold several to people who wanted them for the information they had, and to go with their clones or conversions. I had far more money and time into it than I ever made back, but it was a project I did for myself and others. Even if the FNC manual has active copyright, it's doubtful FN cares about their nearly obsolete rifle and it's relevant documentation. HK and the US Army certainly didn't care, though the XM8 never came to fruition aside from hundreds of prototypes and limited issue to Malasia.

Any copy certainly is worth less than an original, of course. I'd rather keep such a rare and valuable manual kept safe, and use and potentially dirty up a nice copy to save the original. The content is valuable too.

Here's my XM8 SL8 conversion with a real XM8 manual. I keep a near perfect copy of the manual with it now, because if the copy gets damaged, it's ok.