Help...

[blwn99x]

I am trying to change my barrel on my ar15. I cant get the freaking barrel nut loose, any tricks?

[Robocop1051]

Spray some lube (breakfree or WD-40) on it, and allow it to soak over night.

[MikedaddyH]

Go buy a can of "PB Blaster" it is the best $h!T on the market !

Pep Boys or Autozone sells it.

As  LAST RESORT use heat.

[edgecrusher]

Go buy a can of "PB Blaster" it is the best $h!T on the market !

Pep Boys or Autozone sells it.

As  LAST RESORT use heat.

+1 on pb blaster, shits great. Are you using a receiver vise block? If you know someone with one that will make it easier,

[mrraley]

once everything has been removed from the barrel and thebarrel nut has been taken off the receiver...

use the nylon side of your nylon/brass hammer so you do not marr or dent the metal and tap it off. Do it close to the work area so when you knock it off it wont fall far either. 

[washguy]

PB blaster all the way !  :)  Wash

[392heminut]

I gotta jump on the PB Blaster bandwagon too! Great stuff! <thumbsup>

[blwn99x]

so i did the PB blaster, gave one good try and my muthaFin BCM upper receiver cracked on the stand at the ejection port :wtf: :puke: :limp-wrist:

[edgecrusher]

holy shit man, that sucks. here, i'll throw the super secret one out for you! :tfg:

[washguy]

so i did the PB blaster, gave one good try and my muthaFin BCM upper receiver cracked on the stand at the ejection port :wtf: :puke: :limp-wrist:

Hi Blwn    please tell me you did have the upper in the upper reciever block?  and it still happened?  <dontknow>  Wash

[Robocop1051]

For all standard forged receivers, and even some billet, I only ever use this upper receiver clamp vise block.

The clamp on block and the insert prevent any twisting, or crushing, of the upper receiver. I do NOT trust the simple insert vise blocks that pin in.

[washguy]

Robo  me too! its the only one for my ar15's ill use

:) Wash

[MikedaddyH]

WTF happened ! Was the upper cross-threaded ?? Did you use a receiver block ?? Take pics .

[blwn99x]

had it in the " pin block" holder, i DIDNOT assemble this upper, and the barrel nut is super f#*&in tight, i put a fair amount of force on it and crack...guess i will get a billet upper now, which one?

[Robocop1051]

VLTOR, Mega Arms (make sure you get the one that matches your lower), JP Rifle and LMT all make great billet parts.

There are good forged uppers out there too. Noveske chainsaw's are affordable. Armalite and Colt started the AR revolution with forged rifle parts. A good forged upper will cost nearly as much as a billet.

Some are going to poopoo me for being elitist here, but if you want to stay away from "run of the mill" parts, steer away from Stag, BCM, Spikes, YHM, and CMMG. Yes, they are all decent companies that make fine parts. They are not considered top of the line by any stretch. Their errors are masked by massive volumes of product at low prices.

[NoFail]

Great time to go MEGA!!!  <thumbsup>

[edgecrusher]

Rainier and Larue also make billet receivers.

[Robocop1051]

Rainier and Larue also make billet receivers.

Does Rainier actually make their billet, or is it a rebrand?

I forgot about LaRue. Another great company. Good luck finding their uppers. The LaRue "Stealth" upper is sold out everywhere I looked. LaRue is a top tier company. Their products are always in high demand.

[edgecrusher]

I have no idea about Rainier's lower, whether it's a rebrand or not

[washguy]

The mega billet ambi  SWEET!    :) Wash

[edgecrusher]

The mega billet ambi  SWEET!    :) Wash

<thumbsup> agreed, parts for my build arrive Thursday, it'll be like playing in Hugh Hefner's house.

[MikedaddyH]

It seems like everyone is talking billet . But... I will go out on the edge and say material is important 6061t6 is softer than 7075t6. The 7075 uppers are stronger and should be a little  more expensive. Look for this type in your search.

What was the cause beside the torque, Cross threaded or did some one put loctite on the threads ??

[blwn99x]

I have a spikes lower and was looking at the rainier arms billet upper, will that one match? what about black rain ord upper? I dont want to bail on my lower if i dont have to...

[Jgun]

Just out of curiosity, you say you didn't assemble the upper. By any chance was it a factory built BCM upper? If so maybe they'd be wiling to work with you as far as replacing it? If not, why don't you either give Rainier or Spikes a call and ask what uppers will mate up well. I'm sure that they both will know, but Spikes may not be willing to recommend any upper but theirs, I'm sure John at rainier would be able (and willing) to tell you which of the ones he sells will fit your lower. It's a little late for this, but on the chance that someone did assemble it with red locktite, did you try to heat the nut  a little with a torch when it didn't want to  loosen initially?

[MikedaddyH]

Aero precision makes several diferent brands of uppers and lowers, Spikes is one of them.

Just out of curiosity, you say you didn't assemble the upper. By any chance was it a factory built BCM upper? If so maybe they'd be wiling to work with you as far as replacing it? If not, why don't you either give Rainier or Spikes a call and ask what uppers will mate up well. I'm sure that they both will know, but Spikes may not be willing to recommend any upper but theirs, I'm sure John at rainier would be able (and willing) to tell you which of the ones he sells will fit your lower. It's a little late for this, but on the chance that someone did assemble it with red locktite, did you try to heat the nut  a little with a torch when it didn't want to  loosen initially?

I was thinking that, this morning about the assembly.