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Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Miso Beno posted:

A3 flat-top upper receiver

I know lots of people do this but they are wrong.

Also I may or may not have scored a decent deal on a Colt 6450 9mm upper half and BCG.

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Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




What about the blackpowder, crossbow and airgun uppers? Anyone still making those?

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Speaking of polymer lowers, this is kind of neat but pricey as gently caress.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED






https://www.youtube.com/watch?v=b9gWWrVe1QA

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Shaocaholica posted:

Sig used to make these but gave up.

What's the model name/number? That fixed rear might work for a Diemaco build.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Got my 6450 upper today. A little dirty but everything looks solid.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




SinistralRifleman posted:

If anyone has tech questions about the MK3 ask me rather than speculate.

Would the MK3 work for a blowback 9mm build? I assume any issues with magazine adapters can be worked around using Endomags but I'm wondering if the lower itself could withstand that use.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




SinistralRifleman posted:

With a 5.5oz buffer yes
https://youtu.be/tEbNPmPw8Uk

Here’s a .45 with 8oz buffer
https://youtu.be/r8KcnIIw5hM

Awesome, thanks.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




SinistralRifleman posted:

The mold can produce a receiver every 60 seconds.



Shaocaholica posted:

Just don't let Karl write any jokes his humor is awful.

I'll take Karl's shitposting over 90% of what passes for humor on other gun channels.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Roller delay thing looks interesting but I'm like 70% of the way to a Colt blowback build now so welp

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Craptacular posted:

Yeah apparently they break.

There is or was a repair kit available. And of course there's the Nodak replacement lower.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




mischief posted:

SP1 should be skinny barrel, triangle handguards, and full length stock. I definitely wouldn't pay $2k for one dressed up like something more modern.

SP1 carbines never had triangles.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Soupisgood posted:

Brownells has an A1 which would work for me but I want to use an A2 receiver and I think the sights won't match up if I do.

A1 and A2 use the same sight height. Adjustments on the front sight are slightly different but you can just swap out the front sight post for a matching one if it bothers you. It's combining a flat top upper with an A1/A2 front sight base or an F-marked FSB with an A1/A2 upper that introduces height differences.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Atticus_1354 posted:

These guys have a ton of barrels from good manufacturers like rosco with fsp already installed.

https://www.tntesales.com/

FWIW I've consistently seen TNTE listed as a seller to avoid due to long ship times and terrible customer service.

Soupisgood posted:



I'm planning out something like this, what are you doing?

Do the most notorious dissy.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Colt 607 says hi.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




The SPR is the Mk 12. The Mk 18 is the 10.3" CQB carbine.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




My Colt 9mm upper half came with an OG non-ramped Colt bolt. I gather there's a specific hammer style recommended for non-ramped bolts but I'm seeing contradictory information about the exact hammer profile I should look for. WSYTFR?

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




mischief posted:

Mosin Crate just listed some Colt 601 parts kits if anyone is curious about stupid expensive old AR stuff.

Stupid expensive in this case meaning "you could buy like four Brownells replicas for the cost of one of these."

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Action-Bastard posted:

I understand "ACAB" is a thing but naming your gun something that pays homage to a bunch of neo-nazis killing police is rather disgusting.

I thought we were just talking about North Hollywood though?

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Finally got a chance to sit down and assemble the lower half of my bargain bin A1 build. Good news: the Anderson lower I panic-bought in 2016 seems to be in spec and functional. Bad news: the secondhand Olympic takeoff upper receiver I was going to use for this build is not. Near as I can figure, the upper's rear pin hole was drilled off center. I can probably fix it but I probably won't have access to the requisite tools for a while.

Or I can slap on the flattop upper which does fit and make a faux retro DMR thing.

Somebody Awful fucked around with this message at 23:02 on Apr 11, 2020

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Friends don't let friends buy Remington.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




The Rat posted:

Companies I'd look at would be BCM, Centurion, Colt, Geissele, and LMT.

Did Colt reverse their decision to stop selling to the unwashed masses? And do they have anything to offer beyond an expensive roll mark?

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




I have a USGI barrel nut and no barrel to put it on.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Rectal Death Adept posted:

This may be a dumb question but I just got my first AR-15 type rifle. It has a Picatinny rail on the carrying handle, but that seems way too high for an optic. Is there a low profile red-dot I should try?

If it's a non-detachable handle with a rail clamped on top, you can put an optic on that and either add a cheek riser to the stock or just deal with neck weld, or you can replace the rail with a gooseneck mount that will put a red dot sight down in front of the handle to let you co-witness with the sights.

Swapping the upper receiver for a flat top one will give you lots more flexibility but you'll need some tools.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Rectal Death Adept posted:

I guess it's not an AR-15 and I'm in the wrong thread?

No, that's an AR-15 all right. A2 upper receiver with what looks like a nu-ArmaLite forge code and a bolt-on rail, so you have the options I described above.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




That Works posted:

Anyone know of a cheap source for A2 (or even A1) uppers?

There's a steady trickle of Colt SP1 and A2 uppers on Gunbroker from people parting out old rifles, mostly in the $100-$150 range. Also a lot of A1 uppers from the Malaysian export kits coming in right now but those tend to be in pretty thrashed condition.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Nowadays there are even lowers that take MP5 mags and adapters to take SIG, Beretta and S&W M&P mags.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Wiggity posted:

I haven't ever seen a 9mm AR built on a rifle length buffer tube

AFAIK Colt made some during the AWB, but they just used the carbine length buffer and spring with an extra long spacer.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




THREE HUNNERT AAC BLACKOUT!

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Craptacular posted:

Barrel imports are a no-go for us.

gently caress it, I can live with that if it means getting Waltec forgings, Weaver uppers, and Canadian Average Green furniture.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Craptacular posted:

Well yeah and it's pretty easy to get new upper too, so why would anyone want a used upper dripping with maple syrup?

Some of us have family trees dripping with maple syrup okay

Although TBH if I could get Elisco, Daewoo or Norinco parts I'd do weirdo foreign M16 clone builds with those too.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Are you absolutely set on 10.3? Ballistic Advantage has a 10.5 with FSB.

E: oops, out of stock right now.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Maybe Apex or Numrich will step up to the plate.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Here's something you don't see every day. A number of makers produced cast AR lowers once upon a time, but Olympic is the only big one I know of to also make cast uppers.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Basic Aero A2 lowers should do the job just fine, unless you mean plain in the sense of not having a great big logo on the side.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




The Bananana posted:

Had to use my leatherman a few times to pull jammed empty shells out of the chamber, they would be so well lodged in there, jammed up by the bolt.

Check for chamber burrs or an undersize chamber? You said it's a stainless barrel so a gunsmith should be able to fix it if it's one of those issues.

Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




Styles Bitchley posted:

The only mechanism I can see is during very heavy sustained fire the gas tube will probably be the first thing to go from the heat. Seems unlikely but it may be possible this was an intentional consideration to fail and shut the weapon down before you built up enough heat for barrel burst or chamber cook offs.

I think Chris Bartocci touched on this in one of his videos on the M4 and the short version was that full auto destruction testing showed the barrel would overheat and rupture behind the FSB before the gas tube failed.

E: this was with the standard M4 profile barrel that's relatively thin under the handguards, not the newer heavy profile.

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Somebody Awful
Nov 27, 2011

BORN TO DIE
HAIG IS A FUCK
Kill Em All 1917
I am trench man
410,757,864,530 SHELLS FIRED




ArmyGroup303 posted:

"Rounds fired: M4= 535, M4a1= 911."

I kind of agree. It's great that the M4A1 is about 350 rounds more durable than the M4, and there's some value in that.

Just FYI, whoever put that video together doesn't know what distinguishes an M4A1 from an M4. It's the FCG, not the barrel profile: M4 is burst, M4A1 is auto.

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