heating an upper > General Discussion

Posted: 2/10/2017 10:19:42 PM EDT

I have a BCM upper and a LaRue barrel. BCMs website says to heat the upper with a gun to get the barrel on. I don't have one. I was thinking of putting the upper in the over at about 150 deg.

Will that damage the upper?

Posted: 2/10/2017 10:21:50 PM EDT

[#1]

Microwave it

Posted: 2/10/2017 10:23:20 PM EDT

[#2]

Have you test fit the barrel to the upper at ambient temps? I've never had a barrel not fit using quality parts.

Posted: 2/10/2017 10:23:46 PM EDT

[#3]

My heat gun puts out 900 degrees

Posted: 2/10/2017 10:23:50 PM EDT

[#4]

Put it in a saucepan on your stove top. Medium heat 5 minutes.

Posted: 2/10/2017 10:23:51 PM EDT

[#5]

Hair dryer?

Posted: 2/10/2017 10:24:29 PM EDT

[#6]

150?

I've worked in kitchens with much higher ambient temperatures.

Add more heat!

Posted: 2/10/2017 10:24:49 PM EDT

[#7]

Quote History

Quoted:
Have you test fit the barrel to the upper at ambient temps? I've never had a barrel not fit using quality parts.

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Yes it will not fit I even put the barrel in the freezer

Posted: 2/10/2017 10:25:21 PM EDT

[#8]

Quote History

Quoted:
Put it in a saucepan on your stove top. Medium heat 5 minutes.

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good idea thanks

Posted: 2/10/2017 10:25:47 PM EDT

[#9]

Quote History

Quoted:
Hair dryer?

View Quote

Don't have one

Posted: 2/10/2017 10:25:48 PM EDT

[#10]

Dishwasher

Posted: 2/10/2017 10:26:25 PM EDT

[#11]

Would 150 even do anything? That's not very hot as far as metals go.

Posted: 2/10/2017 10:28:03 PM EDT

[#12]

Honestly I don't think it would hurt it. But heat guns aren't that expensive either...unless you need it right friggin now?

http://www.harborfreight.com/1500-watt-dual-temperature-heat-gun-572-1112-96289.html

Posted: 2/10/2017 10:29:28 PM EDT

[#13]

I just installed one and a hairdryer worked fine, I doubted that it would heat enough to make a difference but after heating for maybe 60 seconds it went on very easily. Don't forget to use a little lubricant, I used a little remoil.

Posted: 2/10/2017 10:29:29 PM EDT

[#14]

Maybe you could boil it?

Posted: 2/10/2017 10:30:13 PM EDT

[#15]

150 won't affect the aluminum. You likely won't get much expansion either though.

Posted: 2/10/2017 10:32:13 PM EDT

[#16]

150 is fine. But you are missing out on a perfect excuse to buy a heat gun.

Posted: 2/10/2017 10:34:21 PM EDT

[#17]

Thanks for the help

I put the upper on the stove for a few minutes and the barrel slipped right on.

Posted: 2/10/2017 10:41:29 PM EDT

[#18]

Yeah it won't be a problem. I've done it on gun parts and motor parts. Works like a charm.

Posted: 2/10/2017 10:45:31 PM EDT

[#19]

When I install AKM barrels, I stick barrels in the freezer and heat to trunnion with MAPP for 15-20 sec.

I've never installed an AR barrel that required any of that.

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