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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/30/2005 6:05:55 PM EDT
I have a 20" flat top upper. Can I simply have the front section cut off? Or do I have to move the gas block closer toward the receiver?

Sorry in advance if this is a FAQ, but I couldnt find any info with the search.
Link Posted: 8/30/2005 6:11:43 PM EDT
You need a lathe to cut the barrel down.

You will also need to open up the gas port, depending on how much you chop off.
Link Posted: 8/30/2005 7:32:17 PM EDT
And I've seen good results from a member on these boards that did it for another member.

I'm really warming up to the idea of a cut-down 20" because of that. Makes quite a bit of sense and I bet it'd be pretty light.

WIZZO
Link Posted: 8/30/2005 8:49:56 PM EDT
Whats the advantage to a cut down 20 as opposed to a regular 16in. barrel?
Link Posted: 8/31/2005 2:54:13 AM EDT

Originally Posted By r4nger:
Whats the advantage to a cut down 20 as opposed to a regular 16in. barrel?



You get the smoother ops of the rifle length gas system along with the rifle length sight radius, all in a carbine length, mobile package. If you do it with a gov't profile barrel, you get a very light package, also.
Link Posted: 8/31/2005 4:08:26 AM EDT
Thanks for the replies so far. It is an HBAR, so I don't think I will see any weight savings. What member did it for what member? Are there pictures available?

Link Posted: 8/31/2005 4:52:22 AM EDT
[Last Edit: 8/31/2005 4:53:23 AM EDT by mongo001]

Originally Posted By trebuchet:
Thanks for the replies so far. It is an HBAR, so I don't think I will see any weight savings. What member did it for what member? Are there pictures available?




I did one for BadSVT. I've also done two for myself.

Link to BadSVT's Dissy

Link to my Dissergy project
Link Posted: 8/31/2005 7:56:22 AM EDT
Thanks.

So basically It can be done, but the gas port on the barrel has to be drilled out to .100

Sweet.
Link Posted: 8/31/2005 9:08:59 AM EDT

Originally Posted By trebuchet:
Thanks.

So basically It can be done, but the gas port on the barrel has to be drilled out to .100

Sweet.



0.100" works for me and the barrels I used. Some say 0.110" is needed, but I came up on my gas port size in increments and it ran fine at 0.100", so if you started at 0.100", it should work, but a tweak or two may be needed.
Link Posted: 9/1/2005 6:54:16 PM EDT
Where do you get your 20" barrels to cut down?
Link Posted: 9/1/2005 7:47:52 PM EDT

Originally Posted By Easy_E:
Where do you get your 20" barrels to cut down?



I do them myself.
Link Posted: 9/2/2005 10:24:17 AM EDT

Originally Posted By mongo001:

Originally Posted By Easy_E:
Where do you get your 20" barrels to cut down?



I do them myself.



I'm sorry what supplier do you use for the barrels to cut down
Link Posted: 9/2/2005 12:11:02 PM EDT

Originally Posted By Easy_E:

Originally Posted By mongo001:

Originally Posted By Easy_E:
Where do you get your 20" barrels to cut down?



I do them myself.



I'm sorry what supplier do you use for the barrels to cut down



The EE mostly. I look for new or low round count gov't profile barrels. IMHO, if you want a Dissy, it's the only way to go.
Link Posted: 9/2/2005 3:45:54 PM EDT
+1
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