Gas tube problem G1 kit

jm_mcdermott · February 08, 2010, 13:21

I am building my second fal kit. the first was an imbel on a DSA this one is a G1 built on a Coonan receiver. Have the barrel timed and headspacing done. When I went to install the gas tube and gas tube nut I can't slide things together enough to be able to install either end. The kit did not come with a gas tube so I purchased one online. Have looked through other posts and it most say these things are universal. Are there different length gas tubes and gas tube nuts and if so what do I need for this G1. Prior to this problem everything else went together much easier than my first build.

FUUN063 · February 08, 2010, 13:45

I believe the Izzy and the Inch are slightly longer than the standard metric. But, a pic or two would be the most helpful. Or, maybe measure the one that you have.

Leland

falpara · February 08, 2010, 14:07

Just cut off enough so that it wil fit, the gas tube has no function on the reciever side other than keeping the dirt out.

Raimond

elbo · February 08, 2010, 16:49

Quote:

Originally posted by falpara
Just cut off enough so that it wil fit,

and there are different length gas tube nuts. They won't make the tube fit any better.

Unless you cut off too much.

jm_mcdermott · February 08, 2010, 20:19

The gas tube measures 9 and 5/16". The portion of the gas tube nut that remains after threading it into the receiver is 1.75" Looks like it is about .250" too long

**Abominog** · February 08, 2010, 22:01

Are you screwing it in all the way? Can you see through the pin hole?

jm_mcdermott · February 08, 2010, 22:07

I can't get that far. When I slide the nut onto the end of the tube that combination assembly is too long to get it between the back of the gas block and the front of the receiver. I can install either one by itself and everything threads on fine.

gunnut1 · February 09, 2010, 18:05

What Abominog is asking is are you sure you have the gas tube screwed into the gas block all of the way. You should bottom out the gas tube when screwing into the gas block then back it out intill you can see the gas exhaust hole.

I normally put the gas nut (the thing that screw into the receiver) on, slide it all the forward and then screw in the gas tube. At this point, I install the pin to hold the gas tube in place and screw in the gas nut.

There is no way you can install the gas tube then put the nut on.

elbo · February 09, 2010, 20:01

Quote:

Originally posted by gunnut1
What Abominog is asking is are you sure you have the gas tube screwed into the gas block all of the way. You should bottom out the gas tube when screwing into the gas block then back it out intill you can see the gas exhaust hole.

I normally put the gas nut (the thing that screw into the receiver) on, slide it all the forward and then screw in the gas tube. At this point, I install the pin to hold the gas tube in place and screw in the gas nut.

There is no way you can install the gas tube then put the nut on.

What the OP is saying is that when he slips the nut onto the tube the assembly is too long to fit between the receiver and the gas block.
Nothing screws anywhere until the tube and nut go between the reciever and the block at the same time.

jm_m Correct me if I'm wrong.

The tube should be short enough for the tube and nut slipped together to fit between the receiver and the gas block and long enough that when the tube is screwed properly into the gas block and the nut is tight in the receiver they still overlap.

What Raimond said was all the information needed.

Trim the tube until they fit.

jm_mcdermott · February 09, 2010, 21:12

I bought a used gas tube at the Phoenix gun show awhile back and didn't realize there were slightly different lengths that were made. I also bought a new gas tube recently which I was told was an Israeli. Both of them are the same length. I believe I read in an old post on the forum that the Israeli tubes are longer than the others. Looks like I need to cut one of them about a 1/4" shorter and save the other for something else. Thanks for all of the help.

gunnut1 · February 10, 2010, 12:24

Quote:

What Raimond said was all the information needed.

Well pardon the hell out of me for trying to help.

elbo · February 10, 2010, 21:22

Quote:

Originally posted by gunnut1

Well pardon the hell out of me for trying to help.

You would help even more if you read the question.

gunnut1 · February 11, 2010, 10:40

Quote:

Originally posted by elbo

You would help even more if you read the question.

Whatever.

February 08, 2010, 13:21	#1
jm_mcdermott Registered FALaholic #: 42496 Join Date: Feb 2009 Location: Gilbert, AZ Posts: 55	Gas tube problem G1 kit I am building my second fal kit. the first was an imbel on a DSA this one is a G1 built on a Coonan receiver. Have the barrel timed and headspacing done. When I went to install the gas tube and gas tube nut I can't slide things together enough to be able to install either end. The kit did not come with a gas tube so I purchased one online. Have looked through other posts and it most say these things are universal. Are there different length gas tubes and gas tube nuts and if so what do I need for this G1. Prior to this problem everything else went together much easier than my first build.

February 08, 2010, 22:01	#6
Abominog Old Fart Gold Contributor FALaholic #: 372 Join Date: Jul 2000 Location: Finger Lakes, NY Posts: 6,557	Are you screwing it in all the way? Can you see through the pin hole? __________________ They will live a long time, these men of the South Pacific. They, like their victories, will be remembered as long as our generation lives. Longer and longer shadows will obscure them, until their Guadalcanal sounds distant on the ear like Shiloh and Valley Forge. --- Michener, Tales of the South Pacific Tempus Edax Rerum

February 09, 2010, 18:05	#8
gunnut1 Moderator Gold Contributor FALaholic #: 1877 Join Date: Dec 2000 Location: The great Republic of Texas USA!!!!! Posts: 10,433	What Abominog is asking is are you sure you have the gas tube screwed into the gas block all of the way. You should bottom out the gas tube when screwing into the gas block then back it out intill you can see the gas exhaust hole. I normally put the gas nut (the thing that screw into the receiver) on, slide it all the forward and then screw in the gas tube. At this point, I install the pin to hold the gas tube in place and screw in the gas nut. There is no way you can install the gas tube then put the nut on. __________________ Texas, it's a state of mind!!!! The human race is not the pinnacle of evolution. We are but one evolutionary out come.

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February 08, 2010, 13:45	#2
FUUN063 Computer Illiterate Bronze Contributor FALaholic #: 35576 Join Date: Apr 2008 Location: Converse, Indiana Posts: 4,603	I believe the Izzy and the Inch are slightly longer than the standard metric. But, a pic or two would be the most helpful. Or, maybe measure the one that you have. Leland

February 08, 2010, 14:07	#3
falpara Registered FALaholic #: 14891 Join Date: Jul 2004 Posts: 65	Just cut off enough so that it wil fit, the gas tube has no function on the reciever side other than keeping the dirt out. Raimond

February 08, 2010, 20:19	#5
jm_mcdermott Registered FALaholic #: 42496 Join Date: Feb 2009 Location: Gilbert, AZ Posts: 55	The gas tube measures 9 and 5/16". The portion of the gas tube nut that remains after threading it into the receiver is 1.75" Looks like it is about .250" too long

February 08, 2010, 22:07	#7
jm_mcdermott Registered FALaholic #: 42496 Join Date: Feb 2009 Location: Gilbert, AZ Posts: 55	I can't get that far. When I slide the nut onto the end of the tube that combination assembly is too long to get it between the back of the gas block and the front of the receiver. I can install either one by itself and everything threads on fine.

February 09, 2010, 21:12	#10
jm_mcdermott Registered FALaholic #: 42496 Join Date: Feb 2009 Location: Gilbert, AZ Posts: 55	I bought a used gas tube at the Phoenix gun show awhile back and didn't realize there were slightly different lengths that were made. I also bought a new gas tube recently which I was told was an Israeli. Both of them are the same length. I believe I read in an old post on the forum that the Israeli tubes are longer than the others. Looks like I need to cut one of them about a 1/4" shorter and save the other for something else. Thanks for all of the help.