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Page AR-15 » Rifles, Uppers, Lowers, Barrels, and more
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Archived [ARCHIVED THREAD] - 7.62x39mm barrel turned down to .650 under handguards, safe or not?
Posted: 9/10/2004 1:35:00 AM EDT
7.62x39mm barrel turned down to .650 under handguards, safe or not? I ask becasue I would like to install a JP heat sink on a 7.62x39mm AR, but JP changed the specs on their heat sink. It used to be for barrels of a larger outer diameter but is now available only for barrels with an OD of .650 under the handguards.

[email protected]

Link Posted: 9/10/2004 1:34:44 PM EDT
[#1]
Why not?  M14 barrel is the same diameter as the original M16 was and it'a a lot more powerful than wimpy 7.62mmM43.

-- Chuck
Link Posted: 9/10/2004 4:54:44 PM EDT
[#2]
TSH-

For comparison sake, the barrel on my 7.62X39 AK mic'd at .583"!  Enjoy all that extra steel!

Scot

Link Posted: 9/11/2004 9:36:19 PM EDT
[#3]
Thanks, I feel much better now. Especially thanks fo the AK OD barrell measurment. I had no idea they were that thin. No wonder they heat up SO very fast.

I'm planning one day to build a 7.62x39mm AR, hopefully on the lower  that takes AK mags, anyways, I'm really looking forward to the hopefully positive effects of the JP Heat sink.

Tsh77769

Archived [ARCHIVED THREAD] - 7.62x39mm barrel turned down to .650 under handguards, safe or not?
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