98Z5V

Awesome thread to make your intro.

Indeed I have, and YOU were present. I think that was an evening in the Crystal Palace Saloon...

When all this sorts out and I have my new(est) gun built, I'll have pics and dimensions of the Fulton Armory chromed BCG (DPMS part), the DWilson BCG, and the Armalite AR-10 BCG, all compared together, and against the standard AR15 BCGs.

That pic came from this thread, where we all went nuts and pulled alot of info and measurements on the different (two) BCGs:

This is what they look like when the gas tube is too short - this is the result of ONE combination - this is an Armalite (longer) gas port position in the barrel, combined with a DPMS-based gas tube (standard AR15 gas tube). The end of the gas tube barely even reaches the opening of the cam pin cut out.

We need this topic pinned. Maybe moved to the tech section that would be appropriate for it, as well. Lots of work by all members in this thread.

You'd think they'd change the product description, by now. I almost didn't order the barrel, based on the 1:8" twist description. Hell do I need a 13.5" barrel in 1:8 twist for? Only shoot 220gr projos from it?... Once I blew the pics up, and saw 1:10, I bought it. Shiit, I almost committed to it, before I blew the pics up. Said, "Self... you're gonna have to load only 220s for this thing..." "Self" is what I call myself...

HAAAAAAAAAAAAAAHAHAHAHAHAAAAAAAA!!!!

On a DPMS-based rifle, as my .338 is, that longer gas tube doesn't bottom out on the DWilson BCG's gas key - it's fine. I think the differences we noted on the AR-10 vs. DPMS-based BCGs shows that the AR-10 gas key sits further away from the front of the BCG body, so the AR-10 gas key sits back more than a DPMS gas key does. I think the AR-10 BCG will be just fine with the longer gas tube. I don't think the AR-10 BCG will have enough overlap (gas key covering gas tube) on the shorter AR15 midlength gas tube. Short-Stroke City, is what I think. I'll shoot it like this and find out. I won't know for sure until I get my AR-10 BCG... Shiit like this is the very reason that I hate everyone calling a .308AR a damn "AR-10." There ARE differences. Those differences screw us all up here, trying to find solutions for problems that shouldn't exist, if the nomenclature was correct... I literally see posts now, and just turn away - click on something else. Drives me nuts...

Yes, it will. Here's what my Wilson Combat .338 Fed barrel looked like - it's midlength gas, according to Wilson Combat, but in reality, it's not. It's in between AR15 Midlength and AR-10 Carbine length. First pic is AR15 midlength tube, second pic is the AR-10 Carbine gas tube.

AR15 Midlength gas tubes are 11 3/4" long. AR-10 Carbine length gas tube is 12 1/16" long. Armalite AR-10 rifle gas tubes are equally as much longer than AR15 rifle gas tubes. The AR-10 uses a longer gas system, with only two gas tube lengths - "Carbine" is 12 1/16" gas tube, and "RIfle" is 15 1/2" gas tube. Those numbers don't match any AR15-lengthed gas tubes.

Interesting shiit going on with this barrel. In the Armalite page on this, they say it's 1:8" twist, midlength gas. Weird twist for a .308 Win barrel, and weird gas tube length for an Armalite AR-10 barrel - why not advertise it as an AR-10 Carbine gas barrel? Well, you blow up the pics of the barrel in the Armalite page on it, and you can clearly see the barrel markings, and it's 1:10" twist marked right in the barrel material, with the whole marking reads "7.62 AM SS 1:10," which is the 7.62 Armalite Match chamber (not a .308 Win or 7.62 NATO chamber), and stainless steel material, with twist rate. So, the ad is wrong - typo in the description of the barrel particulars. It's definitely not 1:8" twist, as the ad says. Armalite needs to fix that, but, whatever. If you look closely at the pics, you'll know you're getting 1:10" twist. Now, that "midlength gas" thing... Second time I've seen this recently. I saw this on my Wilson Combat .338 Fed barrel, and cautioned a new member about his WC .308 barrel - hope to get pics of that guy's barrel, when the time comes. Now, I've seen it on this one. Nathan @ Faxon mentioned this - hybrid kind of gas port location. Not DPMS-based, not Armalite AR-10-based, but in between. Either gas tube works, be it Armalite AR-10 Carbine gas tube or AR15 Midlength gas tube. I'm not a fan of this. As we discussed the differences between the two types of BCGs and bolts, it's the proper amount of gas over the proper amount of time, prior to the bolt unlocking and trying to extract the fired casing from the chamber. We're talking milliseconds here, but hot brass is gonna stick in a tight chamber, until it cools and can be extracted. Short gas impulse is gonna lead to weak extraction. Tolerance stacking between manufacturers is gonna screw people over, as we build these things with different parts from different places... My WC .338 Fed barrel worked fine with the AR15 midlength gas tube. It functioned. But I didn't like how short it was, and at that point, I'd only fired factory Federal ammo, the 200gr Fed Fusion soft points. How would it work with other ammo? Don't know, cause the damn .338 Fed loaded ammo is hard to find. How will it work with my handloads? Don't know yet, because I'm not loading it yet. So, I switched out the gas tube with an Armalite AR-10 Carbine gas tube, which went about 2/3rds of the way back the cam pin cut out in the upper... Zero interference with the gas key on the carrier, it's not bottoming out... Longer gas impulse over a longer time will be a more reliable gas operating system. So, in a nutshell, Armalite has done it now. This 13.5" 3-Gun barrel isn't AR-15 midlength, or the gas tube would be dead-smack in the middle of the cam pin cut out. It's about 1/3rd of the way back the cam pin cut out - same as my WC .338 Fed barrel was. I'm going to run it with this AR15 Midlength gas tube, and see how it does, but I'm ordering another Armalite AR-10 Carbine gas tube, which IS going to put the end of the gas tube about 2/3rds of the way back in the cam pin cut out. This weird barrel gas port poop is aggravating - but it's becoming more prevalent. Wilson Combat is doing it, at least on the .338 Fed barrels, Faxon is doing it on their .308 Win barrels, and now even Armalite is doing it on some of their barrels... Something to watch for, and something else to look at, when we get weird "weapons operations problems" asked... Here's the AR15 midlength tube in the upper, on this 13.5" Armalite barrel...

Baby steps... baby steps...

Good setup for doing that - very cool! As it's the 5th one for you, I'll bet you've got it down now. I've never attempted an 80% of either platform, so it always impresses me to see someone milling these. Right on.

Damn! It's already done! Details on the lower process - looks good.

Damn, I completely missed this post - that is a sweet 9mm, Kiwi!!! That suppressor design is pretty damn smart! Awesome rig, man, just awesome.

It would for pins, and bushings would be narrow - but have a better chance.

You jackass...

Welcome aboard, gnat - love your intro! You have a skill for seamlessly incorporating insults right into normal conversation, which leads me to believe that you'll fit right in here!!!

I don't think she needs an optic on that thing - she shoots better than all of us anyway. You put an optic on that gun of hers, and we're all fucked. I'm just sayin'.

Full rip MSRP, straight from DSG, brother. 86 bux. All in stock, too. Oh, and it'll NEVER fail you. Like, ever. Put up your numbers on your setup, wash...

It runs better... It really does... I'm just sayin'. Eugene figured it all out. everybody else had to find a kinda-workaround on it, so they didn't have to pay him some patent-infringement money, or license fees... Eugene nailed it.

One of these days, wash, I'll have you converted over to the Armalite AR-10 Carbine setup, and you'll never, ever look back...

I pulled this from the article I linked above - there aren't too many Hornady 750gr .50 cal rounds, so it's gotta be the 750gr A-Max Match projectile.

I hope they work, because that's AR15 shiit, right there. Those bushings and adapters work for the AR15 pin sizes of 0.154" (small pin) and 0.169" (Colt large pin, with a bore of 0.170" that they go into). I don't think that's gonna work on large frame ARs, because the pins sizes are already larger than that. Also, Colt did that to confirm that no "unauthorized" uppers and lowers were mated together, as a ban-move. That's the only reason they made the large-pin receivers, and they were the only company to do it. The Colt large pin receivers were made between 1990 and 2009.