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Posted: 7/10/2021 4:12:18 PM EDT
[#1]
People pay extra for an interference fit with the upper. Heat up the upper with a hair dryer or heat gun and tap in in until seated and torque your barrel nut. Enjoy your enhanced accuracy.
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Posted: 7/10/2021 4:17:29 PM EDT
[#2]
Quote HistoryQuoted: People pay extra for an interference fit with the upper. Heat up the upper with a hair dryer or heat gun and tap in in until seated and torque your barrel nut. Enjoy your enhanced accuracy. Sweet! It's like a 10 inch barrel so not sure how much accuracy I'm going to get out of it, but that's good news. Thanks for the comment. |
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Posted: 7/10/2021 4:29:21 PM EDT
[#3]
Quote HistoryQuoted: Sweet! It's like a 10 inch barrel so not sure how much accuracy I'm going to get out of it, but that's good news. Thanks for the comment. Barrel in the freezer for an hour or two and heat the upper with a heat gun right before you put the two together. Will probably slip fit at that point and when both come to room temp they'll be press fit with no mallet involved. |
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Posted: 7/10/2021 4:35:41 PM EDT
[#4]
Quote HistoryQuoted: People pay extra for an interference fit with the upper. Heat up the upper with a hair dryer or heat gun and tap in in until seated and torque your barrel nut. Enjoy your enhanced accuracy. this |
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Posted: 7/10/2021 4:52:03 PM EDT
[#5]
Quote HistoryQuoted: this Quote HistoryQuoted: Quoted: People pay extra for an interference fit with the upper. Heat up the upper with a hair dryer or heat gun and tap in in until seated and torque your barrel nut. Enjoy your enhanced accuracy. this this this |
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Posted: 7/10/2021 4:56:24 PM EDT
[#6]
What the others have said. Heat/install. I believe BCM uppers require this method for barrel installation.
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Posted: 7/10/2021 5:30:19 PM EDT
[#7]
Throw bbl in chest freezer overnight.
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Posted: 7/10/2021 5:32:35 PM EDT
[#8]
I learn something new here everyday.
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Posted: 7/10/2021 5:51:45 PM EDT
[#9]
tight press fit is a good thing. That set up should shoot well.
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Posted: 7/10/2021 5:52:41 PM EDT
[#10]
OP won the barrel/receiver lottery.
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Posted: 7/10/2021 6:14:07 PM EDT
[#11]
Quote HistoryQuoted: OP won the barrel/receiver lottery. Guess so. It's taking a break in the deep freezer right now. I'll assemble after supper |
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Posted: 7/13/2021 8:05:43 PM EDT
[#12]
I had the same problem with an aero upper and colt barrel extension
The solution is very simple Use a hot air blower or propane gas burner to heat the housing well, approx. 200 C, of ??course, not until the aluminum melts or the anodizing becomes discolored. When heated, aluminum expands much more than steel After about 20 seconds with the gas burner you can easily insert the barrel into the upper part of the housing to separate it, simply heat the housing again from the outside and carefully knock it apart again, for example with a wooden stick, this works really well without causing damage or scratches on the housing, by the way there are videos about it on you tube |
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Posted: 7/13/2021 8:09:19 PM EDT
[#13]
People use shims to get that tight of fitment. Leave the barrel in the freezer for at least a day for the best effect. You need to slow those molecules down to a standstill.
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Posted: 7/13/2021 8:35:23 PM EDT
[#14]
By the way I am very happy with that bomb proof thight fit with absolotly no play
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