98Z5V

I don't think those peep sights will correct any vision issues - the smaller the rear peep you're looking through, the more it will focus your vision (attention) on what you need to focus on, which it the front sight post. Basic Rifle Marksmanship comes into play - rear right is fuzzy, front sight post is in focus, target it slightly blurry/fuzzy. That's proper sight picture.

Good work, man.

The Armalite AR-10 Carbine Gas Tube (Armalite Part # 10007005) measures a true 12 1/16". That's what you need. I was just pointing out the terminology difference between these platforms. You ask a vendor for an Armalite AR-10 midlength gas tube, and you're either getting a gas tube for an AR15 from them, which will be the same exact thing you have now, or you have a SMART vendor that will send you what you need, not what you asked for... It's OOS at Armalite right now, per the website, but you need to call them on the phone to get accurate inventory. However, it IS in stock at DSG Arms right now, as I type this... https://dsgarms.com/arm10007005

I was gonna say, 285 is the minimum.

Projectile weight will make a big difference, even with a 30" barrel. What load are you shooting? Supersonic/subsonic has alot to play with this one. I found that out with hand loading them.

Damn, I'd take Krieger's recommendation on that, brother. Seriously. With what you're building, I'd ask them first. You're building this from the ground up, completely, it seems. See what Krieger says about that one. For real. What action?

Before you jump to that - Armalite doesn't make a midlength gas tube for 308s, and you never gave barrel specifics. You 16" Carbine gas here, or 18" Midlength gas?... Gotta know what you have right now... If you're running AR15 midlength gas, then you need the "Armalite AR-10 Carbine Gas Tube" to solve that issue. .308AR rifle buffer (5.200" long and 5.4oz), Any old AR15 Rifle Receiver Extension, and Armalite EA1095 recoil spring. That's gonna work in any MagPul Rifle Buttstock. MagPul includes the vented buttstock screw to work with those parts.

That's not the same primer previously mentioned, and the powder wasn't mentioned in the first post. That's my 45-70 powder, right there. I'm just sayin'...

@Matt.Cross

This pic was 33:07 in that vid. Which is great. We were shooting some angled shots at the last Spring Shoot, 2018. Spring Shoot '18: There's lot of vids online about all kinds of this stuff. We get out and do it. Get out to one of the shoots. The Spring Shoots are much smaller, and are the "proving grounds" for all the stuff to try during the Fall Shoots - which are the MUCH larger gatherings.

You guys needs to come out to a Fall Shoot. I kid you not. We shoot, nightly, at 450 yards. Last Fall Shoot we shot to 845 yards and a little more. I have new surveyed positions now, to 1002 yards, and it's not stopping there. What they did in that video above - we just did, last October. @Matt.Cross and I are gonna do it again in March '19, and come up with more stuff to do, at new ranges. 2 years ago, we had a brand new shooter center-punch the target at 660 yards. Hell, several new shooters did it.

What diameter barrel are you trying to fit in this thing, that the MagPul stock won't fit?... Reason I ask is...this Rem heavy barrel fits in a MagPul stock, no issues.

HAHA! They threw Pastrana in there - he took the truck!...

That's pretty damn awesome of you, brother. Really is.

Hardly any vendors jack up the 5.200" 308 rifle buffer. It's pretty safe to get that anywhere. Have to have a rifle length receiver extension, and hardly anyone jacks that up either. For a spring, I'd personally go with the Armalite EA1095 spring, and be done with it.

Only if he buys it for a 308AR, and not an AR15. I'd still put it together from pieces, so you know they didn't jack the spring up - UNLESS you buy it from Armalite or straight from DPMS. ^^^ Had to humor SS there, and throw that "DPMS perfection" to him.

I can create some havoc with a rental truck. Last time I had a Penske truck, I created a scaffold system inside it - when I turned it in, they didn't even know it.

You have a carbine receiver extension there, in that pic, at 7 5/8" internal depth. That's a carbine buffer, too. 3.8oz tells me it's H1-weighted. Get the length on it, but it looks like 3.250" regular AR15 H1 buffer. Your gas tube isn't doing you any justice, that's for certain. Switching it out for the longer one would help you.

From the view if the back of the cartridge, right like this. When the BCG closes (with bolt in the barrel extension), it's turning the BCG counterclockwise (rotation from the rear of the gun, in the "round's perspective"). That sharp edged ejector is causing that "smear" you see in the brass, to the left (or, counterclockwise) from the big round piece of displaced brass. When the BCG opens, it's turning the bolt clockwise - and that ejector is digging in on it's own indentation right there, and displacing that "hump" or sharp piece of brass, in a "moon" or semi-circle, to the left side of that ejector indentation. Now, the ejector indentation is from a hot round - or something bad in your gas timing. The BCG is already trying to moved rearward, but that piece of brass is still locked in the chamber. That sharp-edged ejector is WHAT is happening, but it's not necessarily WHY it's happening. That make sense? EDIT - if you radius the edges of that ejector, you're still gonna have some ejector smears on that particular load - but it's not gonna chew up the rim faces like that.

Looks like ejector issues. See how that ejector looks like it's almost squared off on top? It needs to have a slight radius all the way around it, or it's gonna catch every single round trying to feed from the right side of the magazine.

Illuminated reticles are very useful for shooting at night - if the illum will turn down far enough. I love them.

Kyber, or some fucker you got cuffed and stuffed?!...

You know she's gonna see this one day - and she's gonna go all THIS WAY on you, brother...

What?!

My 150gr FMJ-BT loads are very accurate at 300 yards, at MOA or just under, through the 16" gun. Gotta know the drop on them, though. I don't know if they'd be as accurate through the 8" gun or not, but this is definitely worth testing out now. The 8" is irons only, so it'll take some "figuring out" for the drop, but I'll put the scope from the 16" on it and see what it does. That's about all I load for Blackout, so I don't know how different ammo will perform. I need to try out some lighter stuff and see how far it will go, accurately.