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-   -   For my next AR15 project... 20" barrel (http://www.firearmstalk.com/forums/f20/my-next-ar15-project-20-barrel-84911/)

pnolans 02-22-2013 11:52 PM

For my next AR15 project... 20" barrel
 
I would like to branch out on my next AR15 project.

1. I want to build the Upper myself, instead of buying a complete upper assembly.

2. I'd like to go with a 20" barrel.
a. I want to try something different.
b. I want to work on shooting longer ranges.
It will probably take all year to get the parts in "dribs and drabs"; if and when stuff become available. But I want to plan ahead.

I've become a real PSA-bigot. After my first build worked so well, I want to stick with them.

On their description for their barrels, they say :
Quote:

Please check the barrel closely for any irregularities. It is the builder's responsibility to check headspace before assembling.

Most of the things I've read so far suggest that headspace will likely be ok.
Does that sound right to the experts on here, like Quentin and others?

I got such good advice before, I want to be sure to make use of it.

Jpyle 02-23-2013 12:36 AM

Quote:

Originally Posted by pnolans
I would like to branch out on my next AR15 project.

1. I want to build the Upper myself, instead of buying a complete upper assembly.

2. I'd like to go with a 20" barrel.
a. I want to try something different.
b. I want to work on shooting longer ranges.

It will probably take all year to get the parts in "dribs and drabs"; if and when stuff become available. But I want to plan ahead.

I've become a real PSA-bigot. After my first build worked so well, I want to stick with them.

On their description for their barrels, they say :

Most of the things I've read so far suggest that headspace will likely be ok.
Does that sound right to the experts on here, like Quentin and others?

I got such good advice before, I want to be sure to make use of it.

There is truth and there is cover your azz lawyer speak, 99.99% of the time the latter will apply to the headspace warning on an AR barrel. Headspace is set when the barrel extension is mated to the barrel and the barrel is ported and indexed. There is really nothing you can do if the barrel is out of spec. If getting it checked gives you peace of mind then by all means do it but the probability that the barrel is dangerously out of spec is slim, unless it doesn't sit properly in the receiver or looks obviously improperly assembled. Unlike most rifles, no part of the chamber resides in the AR receiver, it just bolts on to the barrel.

Quentin 02-23-2013 05:14 AM

I agree with Jpyle, head spacing is set by the barrel and extension not the receiver. They want you to be careful and as he said, it's wise to CYA.

PSA is a great choice. Honestly, I'd look at their barreled uppers too. If they have what you want I wouldn't bother with putting the barrel on the receiver.

pnolans 02-23-2013 01:13 PM

Quote:

Honestly, I'd look at their barreled uppers too.
I wanted to do more this time, but that is probably wise. A lot depends on what becomes available when. :)

longunner 02-25-2013 02:29 PM

I want to find a 20 inch barrel for my Vietnam clone too...I also want to build my whole upper myself out of parts. It's too bad there's nothing in stock anywhere at a reasonable price these days...:mad:

Quentin 02-26-2013 05:07 AM

Every once in a while I think about doing a retro AR like what I had in 'Nam but figure it makes more sense to incorporate almost 50 years of evolution/improvements. Closest I've come is a 16" pencil barrel with midlength gas, A4 carry handle and A1 rifle stock. Kinda looks like a 4/5 scale model.

But it would be fun to do an M16/A1 project!

longunner 02-26-2013 12:50 PM

Quote:

Originally Posted by Quentin
Every once in a while I think about doing a retro AR like what I had in 'Nam but figure it makes more sense to incorporate almost 50 years of evolution/improvements. Closest I've come is a 16" pencil barrel with midlength gas, A4 carry handle and A1 rifle stock. Kinda looks like a 4/5 scale model.

But it would be fun to do an M16/A1 project!

That's the plan :D any tips? I have a lower with an A2 stock and I just got the triangular hand guards in the mail the other day. I know I need an A1 upper and a 20 inch barrel but what else can you think of?

pnolans 02-27-2013 12:05 PM

Hey, TNARG, thanks for highjacking my thread!!!! Just kidding! :D

Im very interested in what you're asking about . So, not that you need permission, but please continue. Pretty please! :)

longunner 02-27-2013 01:30 PM

Quote:

Originally Posted by pnolans
Hey, TNARG, thanks for highjacking my thread!!!! Just kidding! :D

Im very interested in what you're asking about . So, not that you need permission, but please continue. Pretty please! :)

Well I guess I now that I have the go-ahead...a list of what I have so far and a list of what I think I need. I have a New Frontier Armory lower (non milspec I know I know leave it alone) with an A2 stock on it. I also just bought the triangular A1 style hand guards.

Now what I need:
A BCG preferably M16 BCG
A stripped A1 lower
A 20 inch barrel (don't know what kind of comp/flash hider I should get or even what I can have in the people's republic of New York)

Can't think of anything else though I think that's it.


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