There’s a lot going on and I’m not quite sure he understands any of it

It's not just a scratch. There is a bur on the upper now.

File it down

Knock it down with a stone or file

Are you that inept

are you or are you not using aeroshell 33ms grease on the barrel extension

He’s clearly not

Wiggle the barrel more so the feed ramps don't bite the upper

Not yet, I just wanted to test fit it.

Gee whiz

What do you know

amazing

It is the feed ramp area so you might have a point @Trolly

you're test fitting it without the grease to help fit it and prevent it from seizing

Every YouTube video I watched show it sliding down easily without grease.

Barrel extensions are all made by other companies en masse and ground to size, so it's probably not the problem

who the fuck makes a youtube video fitting a barrel to an upper without grease?

>hurr I fucked this up I’m mad at the people who made this for providing me with a nice tight fitting upper

you shouldn't have to pound it but it will be snug

Crappy uppers are loose, you want tight

how the fuck did you manage to burr it

I've got a torch I can use.

who let you use a torch

Good I hope you cut through the receiver

Huge numbers of retards build ARs and tons of videos have a lot of ridiculous misinformation

dont do it, you'll just somehow manage to anneal your barrel

Arfcom tuning guide has people laying shims around the barrel to make it tighter. That would be wack

That’s common

Feeling around again, there actually isn't a noticeable bur. It looked like there was one though.

just take it to the fucking gunsmith

I've never had an extension that loose

What parts did you buy?

This dude really earning his blue name

Nor have I but I know people will do it just to make it jam packed tight

Faxon Gunner barrel, Aero milspec upper.

yeah i assure you there is no problem with the parts

They're both probably right

i trust both faxon and aero a lot more than i trust you

Yeah both of those are fine

Those companies will have go/no go gauges in production and qc

You should really reassess building your own AR before you lose an eye to a detent and spring