Drilling gas orifice

Primative · May 05, 2002, 19:34

Do you have to remove gas block to drill out the gas orifice? It seems like a straight shot with the gas adjuster slid back.

Also, I bought a spare piston from Tapco (L1A1), it will not cycle at all. It looks basically the same, but some of the machined checks look to have more radius to them.

Thanks

**sportsnut** · May 05, 2002, 19:38

On a metric FAL remove the front sight to get at the gas orifice. I have never done an inch model.

MM in NM · May 05, 2002, 20:24

Tapco will stand behind their gas pistons. I would suggest that if you are perhaps so Primative that you don't have a measuring device that you find someone who can measure the diameter for you.
There seems to be some problems with only a few of the Tapco pistons, at least one reported by a guy in Arizona, in that the guide "eggs" and I don't know what else to call them, were of a too large diameter but I have not had that exierence. You'd know if you measured it.
I havn't drilled a gas port either (yet) because all the guns I've built operate fine as they are but it seems to be the norm to drill them through the gas block as needed after all other gas system tweeks are tried. Straight down from the removed front sight hole in a metric gun and at an angle through the hole as you observed with the inch guns.

SoManyGun'sSoLittleTime · May 05, 2002, 20:45

on the L1A1 you have to drill through the hole under the gas adjusment nut

Did it done it not hard at all! I love that 16 1/2 inch barrel

May 05, 2002, 19:34	#1
Primative Registered FALaholic #: 5708 Join Date: Feb 2002 Location: Southeast Posts: 128	Drilling gas orifice Do you have to remove gas block to drill out the gas orifice? It seems like a straight shot with the gas adjuster slid back. Also, I bought a spare piston from Tapco (L1A1), it will not cycle at all. It looks basically the same, but some of the machined checks look to have more radius to them. Thanks

May 05, 2002, 19:38	#2
sportsnut Curio & Relic Contributor FALaholic #: 3817 Join Date: Aug 2001 Location: Eugene, Oregon Posts: 3,370	On a metric FAL remove the front sight to get at the gas orifice. I have never done an inch model. __________________ "Just because you're right doesn't mean I'm wrong." Ron W.

May 05, 2002, 20:45	#4
SoManyGun'sSoLittleTime Registered FALaholic #: 4585 Join Date: Oct 2001 Posts: 518	on the L1A1 you have to drill through the hole under the gas adjusment nut Did it done it not hard at all! I love that 16 1/2 inch barrel __________________ "WARNING, Continued browsing of this site will result in physical and mental addiction!" You have been warned! ;)

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May 05, 2002, 20:24	#3
MM in NM Registered FALaholic #: 5720 Join Date: Feb 2002 Location: East mountains of New Mexico Posts: 461	Tapco will stand behind their gas pistons. I would suggest that if you are perhaps so Primative that you don't have a measuring device that you find someone who can measure the diameter for you. There seems to be some problems with only a few of the Tapco pistons, at least one reported by a guy in Arizona, in that the guide "eggs" and I don't know what else to call them, were of a too large diameter but I have not had that exierence. You'd know if you measured it. I havn't drilled a gas port either (yet) because all the guns I've built operate fine as they are but it seems to be the norm to drill them through the gas block as needed after all other gas system tweeks are tried. Straight down from the removed front sight hole in a metric gun and at an angle through the hole as you observed with the inch guns.