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Barrel wont fit?

Started by ramathorn , March 15 2012 06:58 AM

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#1 OFFLINE   ramathorn

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Posted Mar. 15 2012 - 06:58 AM

Ok so I dropped off my bcm barrel with the bcm upper and the shop called me yesterday and told me the barrel isnt fitting? Ever hear of something like that? I've heard you sometimes need to tap the barrel in but he said he didn't want to do anything without me there....As fas as i know all bcm barrel will fit all bcm uppers right? lol

#2 OFFLINE   Potbellied Yeti

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Posted Mar. 15 2012 - 07:01 AM

Emory cloth? I can't wait to see the answer to this one.


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#3 OFFLINE   ramathorn

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Posted Mar. 15 2012 - 07:56 AM

Emory cloth? I can't wait to see the answer to this one.



dunno what you mean but, the barrel is teh 14.5 in barrel they sell from their website and the upper is an upper a barrel was removed frmo so i dont know what the issue is.

#4 OFFLINE   satchmodog

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Posted Mar. 15 2012 - 07:58 AM

barral won't fit, you must acquit.


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#5 OFFLINE   RioGrandeShooter

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Posted Mar. 15 2012 - 08:45 AM

Some emory cloth or scotch brite.. maybe too much PARK on the extension..

Won't fit.. maybe the barrel is missing the extension and someone missed it?? :blink:

I want PIC's..

I've had somewhat tight fitment on builds.. nothing a drop or oil usually won't fix..

Sometimes the insert angle is bad.. (joke here)..

Make sure they check the feed-ramps for you too..


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#6 OFFLINE   madcratebuilder

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Posted Mar. 15 2012 - 08:47 AM

Some times the barrel is a tight fit, that's a good thing. Inspect both the barrel and upper for any dents, dings or burrs, then check the fit. You may have to tap the barrel into the upper with a light hammer, I use a rawhide mallet for this. Your not trying to drive a nail, just light taps should seat the barrel.

Last resort is the freeze the barrel and heat the upper, this aids on really tight fits.

#7 OFFLINE   Arcane

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Posted Mar. 15 2012 - 02:13 PM

Last resort is the freeze the barrel and heat the upper, this aids on really tight fits.

That trick works on AK's, but I would never heat the upper. You got a brass pair.
When I do barrel installs a tight fit is great, but as was said any small nicks or a touch thick on the park can cause a bit of trouble. Grease the barrel before you slide it into the receiver first off. the receiver wasn't damaged when the last barrel was pulled I assume.You are dealing with somewhat tight tolerances which is good, and having the receiver come from the same manufacturer helps. Grease her up, tap her on. Pics would help you out a lot too :thumb:

Edited by Arcane, Mar. 15 2012 - 02:13 PM.



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#8 ONLINE   Etho

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Posted Mar. 15 2012 - 02:50 PM

I've done a couple dozen barrel installs, swaps and free float rail installs. I've never had a barrel not fit or need tapping. A little grease and they go right in.

I also would like pics to see how they say it isn't fitting.


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#9 OFFLINE   newbe

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Posted Mar. 15 2012 - 04:40 PM

Tagging this...


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#10 ONLINE   THESPECIALIST

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Posted Mar. 15 2012 - 05:28 PM

Barrel in the freezer for an hour or so, upper in tdirect sunlight on a window sill or on a heat vent inside the house. If it still doesn't fit, lightly polish the inside of the upper with a red scothcbrite. DO NOT hit the crown of the barrel with anything to force the barrel in. If you damage the crown, your accuracy just went to shat. A light tap with a rubber hammer is fine, nothing more.


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#11 OFFLINE   FinFan77

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Posted Mar. 15 2012 - 05:30 PM

Barrel in the freezer for an hour or so, upper in tdirect sunlight on a window sill or on a heat vent inside the house. If it still doesn't fit, lightly polish the inside of the upper with a red scothcbrite. DO NOT hit the crown of the barrel with anything to force the barrel in. If you damage the crown, your accuracy just went to shat. A light tap with a rubber hammer is fine, nothing more.

Wow, you're a fart smeller. :wink:


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#12 OFFLINE   ramathorn

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Posted Mar. 15 2012 - 06:55 PM

lightly sanded the coatings down and it went right it. No problemo.

#13 OFFLINE   Nwatson99

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Posted Mar. 15 2012 - 07:43 PM

Good to hear I was saying WTH??? :laugh:

You shot that bad boy yet??


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#14 OFFLINE   scotto

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Posted Mar. 15 2012 - 07:55 PM

barral won't fit, you must acquit.

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