98Z5V

What's the goal for this gun, man? What distance do you want to take it to? Asking, in reference to what you'll be reloading.

Going with heaevybuffers is SUPER easy to do, and you'll get fast shipment (even on a Sunday, I've found), and a top-notch product. He can sell you the buffer and the right spring at the same time. There's a bunch of different ways you can tackle this, also. I'd suggest going through this thread to get acquainted with the parts, dimensions, weights, and the WHY - of how it should be this way:

Well, you are NOT a small guy... That steak makes sense, knowing that...

NICE HAUL, BROTHER!!!

Run the .243. It's just a .308 Win case necked down to 6mm. 6mm projectiles are amazing. What twist rate is the barrel that you have?

Man... They are maxing that crescent wrench out, they way they have it set up.

Picked from the field of Ranger Instructors (RI's) that are stationed at Ft Benning, in 4th RTB. That's the first phase of Ranger School (Ft Benning, and 4th RTB), and where they do those demos. It's staged/presented out at Victory Pond, at the Water Confidence Course. Here's what it is - this is some family-wife video, so that's her backdrop music - but you get the gist of it:

Looks Legit!

Jodi Arias, my dreamgirl... 🥰

I can tell you right now, by looking at that buffer, that's 3.250" long. I'm just sayin'... And, I'm betting your receiver extension is 7.000" internal depth. AR15 Carbine receiver extension.

Awesome background on him - that was a good read, Rene.

It was mentioned in this thread: https://forum.308ar.com/topic/20457-new-guy/?tab=comments#comment-324897

Poly80s are super easy, brother - VERY much so, with a hand drill. I think the first one took me 45 minutes, Completed the next two in a total of 45 minutes. The speed picked up on those others when I clipped most of the tabs off the tops of the frames, instead of filing the whole things off.

Posting in one place on the board is sufficient. You don't need to post this all over...

Looks like Tactical Machining, but the trigger guard is different. Also, this is the wrong section for this thread - this isn't information that other people need to read and know.

It has the wrong buffer in it - the buffer that's in there is too long - or the receiver extension is too short, internally. One of those two. Bet the guy that built it just tossed an AR15 Carbine recoil system in it. 7.000" internal on the extension, and 3.250" carbine buffer.

Great to see you posting again, Al!!! Missed you, brother. Saw a post from you on Full30 yesterday, and was gonna get ahold of you through here. Glad you're around, and not gone.

Well, it certainly wasn't Al Gore, and his mysterious Global Warming that did that to you... GOD did that to you, just to remind you that he is still in charge. You're in his hands now... Wrap up...

The AR-10 Carbine buffer was developed first. They needed to keep it the same weight as the rifle buffer, but make it shorter. Tungsten was the answer, and with the outer body still made of aluminum, three tungsten sliding weights of the appropriate length came up to the same weight as the rifle buffer. After THAT, it was determined that the receiver extension had to be 7 5/8" internal depth. The same operating spring was able to be used. AR15 Carbine recoil systems came along later, the length was kept at 3.250" long, and the receiver extension was spec'd out to be 6 15/16" internal depth. That buffer needed to be lighter than 5.4oz on the original Carbines, so the tungsten weights were replaced with lighter steel weights. The AR15 needed it's own design for a recoil spring, because the rifle spring was far too long.

Damn! You're still loved brother, and the tool is GREAT! I'm just sayin'... if you need to change an ejector right now, or you're only gonna change one ejector - then the .45ACP brass is a WAY easier choice, over waiting for a tool to get to you...

I guess I didn't answer your question correctly, initially. The original Amalite never built the AR-10 Carbine. That development didn't come until later. In 1961, Stoner left Armalite, and went to Colt. All that carbine development of the rifle systems, for both AR-10s and AR15s, was under Colt. Finding Colt history on when exactly what was developed, by date, is hard to do. Colt had the .gov contract for the M16 then... "All Secret Colt Shiit" during that era.

When their fingers don't smell like shiit anymore...

You need to hang out with me for a day - it's pure chaos, all day long...

From the movie "Den Of Thieves" - which is great, by the way...