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11/4/2007 4:56:37 AM EDT
If I take my 20" barrel and cut it at 16" like a dissapator would it give me any problems? Are the gas port holes the same size?  Would the shorter length affect cycling?  Thanks
11/4/2007 4:59:31 AM EDT
[#1]
My question is why take a good barrel and cut it down?

You would be far better off building a 16" upper and keeping what you have since you will spend more time and money converting.

Just my personal experience
11/4/2007 6:38:10 AM EDT
[#2]
I have the tooling needed to do the conversion so it will not cost anything only some time.  As is no one can seem to get a decent group with it although I don't think making it shorter is going to help it.
11/4/2007 8:10:51 AM EDT
[#3]

Quoted:
I have the tooling needed to do the conversion so it will not cost anything only some time.  As is no one can seem to get a decent group with it although I don't think making it shorter is going to help it.


Try some hand loads and find out what the chamber specs are and go from there, it may not be the barrel but the ammunition or the trigger even.
11/4/2007 8:15:32 AM EDT
[#4]
Assuming it's a standard rifle length gas system, you would need to open up the gas port.

Really, you'll probably be better off with a new 16 inch barrel with a mid-length gas with a low-pro gas block under the handguards.  You can keep the 20 inch barrel and use it for another project or sell it on the EE.
11/4/2007 8:16:09 AM EDT
[#5]
Well, first off, I recommend randall @ ar15barrels.com for any sort of barrel work.

There are 16" barrels with rifle length gas systems out there.  I think ideally for a 16" you have a mid length or carbine gas system.  I second the notion that you'd be better off buying a new upper/barrel or troubleshooting the cause of your accuracy issue rather than cutting.
11/4/2007 9:48:34 AM EDT
[#6]
gas port will need to be opened up.
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