silly gas setting question

[boofus]

Which side is the high (closed) gas setting and which way is low (open)?

I see people refer to left and right but left and right depends on which way you are looking at the gun. From the front and back left and right are reversed.

Can someone clarify which setting is which? Say one setting is cocking knob side, and the other is no cocking knob.

My FNC works with wolf ammo when the lever is set on cocking knob side, but only fires 2-3 times before stopping on the non-cocking knob side.

[chrisp929]

when looking down gun as if shooting .. slide lever to left for regular fire .. right for granades or what not ..

[Hud33]

boofus,

The cocking knob side has two raised lines and the non-cocking knob side has one raised line. The single raised line side is for full power loads and exposes a small hole at the front of the gas cylinder to bleed off excess gas pressure. The double raised lines side closes off the hole and increases the rearward pressure on the gas piston. If you look in the FNC Operator's Manual all the pictures show the double raised line side selected.

I talked to Curtis at S&H Arms about this and he said use the double raised lines side for normal shooting. (With low or regular powered ammo)

[boofus]

Ah ok that makes sense. Wolf isn't loaded as hot as the milspec ammo so it needs the higher gas setting.

Thanks for the info. I really need to get the operator's manual.

[Mike Duke]

Chrisp929

For grenades you flip up the grenade sight and it shuts the gas off in the gas block.

[chrisp929]

humm .. ok so i keep the lever to the cocking knob side for regular loads ? .. and to the left for high power loads ? good to know . thanks

[sportster]

boofus,

The Operator's Manual , MO-FNC-03-En, dated October 1987, for the FNC says under Gas regulator:

The gas regulator control lever can be set on two positions:
1- To the left for firing under normal conditions.
2- To the right for firing under adverse conditions (extra power) --
mud, sand, snow, etc.

The FNC gas regulator lever is marked with 1 line towards the left, Normal position, and 2 lines to the right, Adverse conditions.

I have never had to fire mine on number 2. Wolf ammo is weak but runs perfect on position 1. I've shot over 10K rds. since May, 2001, and never had a problem, even during Beta mag dumps. Why hammer you gun on number 2 if you don't have to?

Rick

[Hud33]

sportster,

Do you use 3 round burst? With mine on setting number one the burst brings failures with most ammo but the hot stuff. If you look at your referenced manual you will see that the pictures all show the lever in the number two setting. This is probably due to training ammo being used. Some ammo works fine in the number one setting but all ammo works in the number two setting.

What about everyone else with a converted FNC? Does your FNC function in 3 round burst with the number one gas setting with all types of ammo?

[boofus]

Mine can't handle Wolf on the low gas setting.

Wolf on setting 1 works fine in semi-auto but if I try to full-auto or 3rd burst it chokes after a few rounds. On setting 2 it runs perfectly.

[sportster]

Hud33,

Yes to your 3 rd. burst question. I never had to use the no. 2 position on my FNC. Mine is a S&H conversion like most others. I only used South African brass cased ammo until the Wolf polymer coated ammo came out. I never used the older Wolf ammo. My FNC throws the spent casings a good 40' when firing. Do you have the combo tool to clean your gas groove and system? They work great. A little G96 and you're ready to go.

Rick