98Z5V

Looks like a good build - this will be nice.

Now, you need to determine if that receiver is DPMS high or DPMS low... https://762ar.com/dpms-a3-handguards/

Hornady put that information out, when the ELD-M came out. I don't know how they found it out, but that would be a tough job to determine... At any rate, I use Hornady ELD-M projectiles in many different calibers, and they work. They're accurate, and repeatable. I've used the older Nosler 180gr .308 "white tips," in loaded ammunition, and they work, too. I probably still have a box or two of those around here. Polymer tipped ammunition feeds just fine, and it's not even an issue. Soft-point ammo is a different story. If might feed, but catch a part of the barrel extension - and cut it. As soon as you shoot it, it might go off target - like a fletch on an arrow sticking out. I don't like soft-points through a semi-auto AR, for that reason. Some don't feed worth a shiit, and jam worse than 36gr .22LR hollowpoints in a Ruger 10/22...

Eh, mid-year changeover, or something. Now, the Matrix sets you can get are DPMS-cut.

You mean, JUST LIKE ObamaCare?... Yes, it's .gov-sanctioned extortion, brother. It only makes Pelosi, with a salary of $193.4k a year, ... - earning more than 1million a year. That's what it does.

Completely changed the operational characteristics of this rifle, thanks to Primary Arms and a $56 sale on the MagPul detachable mag system for Rem 700 Long Action Magnums. It still needs the EGW 30 MOA rail on it, but that will happen with time. For now, it's in a very good position to explore the Hornady 225gr ELD-M loads, and finalize that load. Just in time for summer in the desert. Not looking forward to that... Every bolt gun should be mag-fed. JMHO...

Or, that Microstation stuff is so complicated, that there's a trick to it, and "you have to know which way to tickle that girl" to get it to respond... Don't blame you, brother...

These DB10 receivers are exact copies of Matrix Aerospace receivers (and Matrix made all the Ruger SR-762 receivers), and I have an early Matrix with a DPMS-sized barrel threading on it. However, Matrix released them in both thread patterns. DPMS pattern is 1 7/16" diameter by 16-pitch threading. Armalite AR-10 is 1 7/16" diameter by 18-pitch threading. That's what you need to discover on your upper. The Armalite cut matters - for mating to a lower. In these sets, the threading is what's gonna determine what handguard you need to get, to fit your rifle. Once you know (and tell us) that information, recommendations will come out...

I think you got some Aervoe paint coming, brother... Aveeno is some kinda beauty care products... I used that stuff on my Savage FV-SR, and it's some pretty damn great paint.

As per John By-God Moses Browning.

Shoulda went after that fucker with some oxy/acetylene...

(1) That is completely true, and it happens often. Alot of times, we need more information besides (for example, the most recent I saw today) - "I'm changing from a 20" barrel to a 16" barrel." Very few details other than that - and so much more needs to be found out before recommendations can flow. "Need More Information" isn't a slam against what you're doing, planning, building, or already did - there's THREE different semi-standard patterns to follow in this Big AR platform - and alot of these specific parts don't interchange. The request for details should not be taken as an insult. If it offends you - then we just learned everything about you that we needed to know anyway... (2) Man, THAT is the TRUTH!!! Bro, when he stated "NO NOT FEED THE ANIMALS," he was talking about YOU!...

You need to determine what you have, first. Is that DB10 rifle made for the DPMS-based pattern, or the Armalite AR-10 pattern?...

GI Issue 1911s were only made to shoot 230gr Ball ammo, nothing else - and the feedramps were only for that fatass ball round.

That looks like garbage, and zero specs listed in that ad. It's a 2.500" buffer, for sure, spring is weird... No way. Avoid. CALL Armalite on the phone, and talk to someone there - they might piece a kit together for you and send it. What's out of stock right now (and it really was in stock a few days ago) is the assembled, packaged kit. If they have all the parts there, in stock, to give you a kit, then they will. Or wait until the package-monkey makes more packages of them. I've called them before, then driven up there at lunch and picked up my parts - that weren't in stock. And, they don't have a retail office or do over-the-counter sales... That's saying something - they do care... They're coming back, and they're good. Once they're in full-swing, it'll be great.

My only question is - would it be so hard from a bolt action rifle? If there's a huge difference between extracting that same round from a bolt-action, and from an AR with no gas system, something bad is going on here.

Don't let him pull the trigger until the $$$ is on your hand, brother!... Josh can go WATCH you shoot it... Bring the gun - AND Josh to the Fall Shoot. We'll all shoot it - he doesn't even get to touch the trigger, until you pull the Jesse James shiit on him...

Feedramp angle, period. We know that now. I had some guy come on this board and tell me how badly my Kimber Desert Warrior would perform with hollow-points, because he had all this experience with military 1911s, and it was proven. Believe it or not, I didn't even respond about that - he was out of touch with current reality. I think that was in the thread about that pistol. Whatever, for his "advice"...

Exactly.

Why are you trying to mold a charging handle, man?...

4.5 years, bro. 4.5 years. You necro'd a dinosaur...

Hmmm... Imagine THAT. Who'da thunk it?

I don't have that choice - it's gonna stick up no matter how I wrap it to keep it down...

Only when it sticks up above the waistband...

Here's a 13.5" Armalite barrel, pinned/welded muzzle brake taking it to 16.1" OAL. It's not a pistol config, and has a buttstock, but it just runs and runs. I'd hunt this gun out to 300 yards, no questions asked. Wouldn't even think twice. They're more than just range toys. This thing rocks.