Rebuilding?

[Flashbanggoodbye]

Since my stuck bolt mishap, i have to basicly rebuild a upper for my LR308 Oracle, my upgrading idea is a fail safe bolt carrier group, a Aero Precision upper receiver, and a stainless steel 308hbar16 barrel. 

My question is the barrel comes with a barrel extension, what are pros and cons of a extension? I don't want to change gas tube or rail set up. 

[Flashbanggoodbye]

So barrels don't automatically have this machined in? Ok, just really looked at my dpms barrel, now I'm understanding it's seperates from the actual barrel, but how? Is it a dowel pin? Can i punch the pin out and Seperate? Bolt and shot casing are still lodged in it. 

[shooterrex]

The pin just locates the Barrell so the gas port  is in the right place. The extension is screwed on with about 90 ftlbs of torque. The chance on a different extension indexing to the right spot to where the gas port is at 12 o'clock is pretty slim. Just buy another barrel.

Edited June 21, 2020 by shooterrex
spelling

[Flashbanggoodbye]

Ok, a new moriati arms barrel is in the budget for next Friday, but I'm on a quest now to vet this casing out" i had to cut the receiver in half to get it apart, somehow the bolt got jammed in the extension flanges, and is tighter than God. I wanna know what happened? The rifle shot perfectly 150 shots then bam, my other post tells the story...

[shooterrex]

Put the extension in a vice and get a big pipe wrench and unscrew the barrel. Your getting a new barrel anyway. This should let you see some of what happened.

[Flashbanggoodbye]

It's a dpms out of the box, I've upgraded the rail, the buffer and spring, changed it over to mil spec tube, new stock, tyrant design2 handgrip, and put it under a 4x16x44 vortex Diamondback, really loving the punch, but dam it's costing me a fortune... Lol. But knowledge is power, and I've learned a lot about the AR10 platform.

Thanks for the help, really.

[shooterrex]

https://www.cdnnsports.com/ar15-heavy-barrel-762x51-16-1-10-dpms.html#.Xu65VtYpD7w

[98Z5V]

2 hours ago, shooterrex said:

The pin just locates the Barrell so the gas port  is in the right place. The extension is screwed on with about 90 ftlbs 175 lb/ft of torque. The chance on a different extension indexing to the right spot to where the gas port is at 12 o'clock is pretty slim. Just buy another barrel.

I had to fix that for ya.

[shooterrex]

Tnx