Help me find a 308 Upper

[Phil Goode]

Hello everyone and Happy New Year,
I am fairly new to this site and I love all the great info you folks put out there. So I'm asking you guys for some ideas.
I recently purchased a DPMS style lower from SMOS Arms. Its model GFY-10. in .308. Well actually, it's a multi caliber. Which maybe to my benefit. I'm not sure. I don't know a lot about the multi caliber stuff.
So here's what I'm looking for: I want something piston operated with a 20 to 24" bull barrel. And I want something nice. And for long range, I am not afraid to spend some money on this. But i'm not sure if there is an upper that I can buy that is complete? Or is it something that I have to buy in pieces? Also a recommendation on good optics. Drop in triggers, etc.
Just so you guys know, I'm not a total noob. I currently own other rifles. I have a .300 BLK and a 5.56. But I don't know much about the AR 10 platform. And I'm finding out that not all uppers will go with all lowers. So any suggestions that you guys have will be greatly appreciated. Thanks.

[b18bturboek9]

If you want something cheap for now http://www.aimsurplus.com/product.as...per%20Receiver but to be honest you'd be better off with a matching upper and lower receiver set. I went that route because I was worried about having a gap between the upper/lower. 308 isn't as universal as the a15 platform. Try rainerarms for parts or see if they have complete uppers.

[Phil Goode]

I see what you're saying. Just by the upper and build off of that. Their selection of completed uppers doesn't match my criteria. Thanks

[pmzirkle]

We bought two custom made uppers from the attached builder. Contact him for building yours. http://www.gunbroker.com/item/610334...item/610334617

[pmzirkle]

http://www.gunbroker.com/item/610334617

[lwbyo1]

Unless you can find someone selling something like a REPR upper, you're pretty much SOL for a piston set up.

[EODTech08]

Why buy a complete upper? Why not build it? Building an upper is super easy.

[lwbyo1]

Why buy a complete upper? Why not build it? Building an upper is super easy.

Who sells an add on 308 piston kit?

[EODTech08]

Who sells an add on 308 piston kit?

Bah, my bad for overlooking the "piston" requirement.

[Phil Goode]

Unless you can find someone selling something like a REPR upper, you're pretty much SOL for a piston set up.

What is REPR upper?

[lwbyo1]

What is REPR upper?

LWRC REPR

[tjlayzer]

The OP mentioned using a DPMS pattern lower. So that would rule out the LRWRC REPR, which is unique but similiar to KAC SR25 style which does not work with DPMS lowers. Probably best to check out either the PWS MK2 Mod 1 308 Uppers or POF P308 uppers which use the DPMS pattern.

[OlderThanDirt]

POF USA and Fulton Armory both sell compatible complete upper receivers.

[lwbyo1]

The OP mentioned using a DPMS pattern lower. So that would rule out the LRWRC REPR, which is unique but similiar to KAC SR25 style which does not work with DPMS lowers. Probably best to check out either the PWS MK2 Mod 1 308 Uppers or POF P308 uppers which use the DPMS pattern.

Seeing as the only SMOS GYF-10 lower I've ever seen utilizes the AR10, KAC, LMT, LWRC, etc........ style cut, I stand by my previous statement. But I'd definitely come out to watch you fit a radius cut upper (like the PWS MK2 Mod 1 or a POF P308) to an angular cut lower, I love a good magic trick.

[Drew Eckhardt]

Hello everyone and Happy New Year,
I am fairly new to this site and I love all the great info you folks put out there. So I'm asking you guys for some ideas.
I recently purchased a DPMS style lower from SMOS Arms. Its model GFY-10. in .308.

In the unlikely event you built it with a place holder upper last year yielding a grandfathered featured bullet buttoned semiautomatic center fire rifle you intend to register, get a stripped SMOS Arms upper. Note a lower is not a grandfathered assault weapon, and assembling it into a banned configuration is a felony.

Otherwise sell it (or set it aside for a rainy day) and buy a matched set with upper, lower, and perhaps handguard. If there's a fore end you're especially attached to buy matching receivers in the appropriate top rail height - pre-2009 DPMS "high" / Armalite (different barrel nut threads), and post-2009 DPMS "low".

With no milspec, large frame AR receivers are all reverse-engineered from either the DPMS LR-308 (radius rear cut) or Armalite AR10 (angled cut. The KAC SR-25 may be the original there with those companies sharing some parts and perhaps blueprints) with varying guesses on measurements.

Sometimes allegedly compatible receivers don't fit. My Aero Precision M5E1 won't close on my genuine DPMS LR-308 lower because the rear cuts don't match close enough. The charging handle on my Alex Pro upper won't clear my M5 lower (that upper is well made - tight fit on a barrel extension, scalloped 1913 cuts, T-marks).

Most of the time they just don't fit like a gun that expensive should. I wasn't happy with the rattle from all four uppers I tried on my LR-308, and Fulton Armory couldn't find one I'd be happy with when I sent them the lower to find a mate.

Or is it something that I have to buy in pieces?

That's the best option.