98Z5V

I personally don't know shiit about tuning a .243, but that gas port was WAY too small. 5.56 on a 16" carbine gas barrel is bigger than that!

That's good, because Dolphin Rape is real!

Damn, I like that knife.

I like it, brother. Alot!... All those powders look like good powders for this cartridge. Did you get any of the ES and SD numbers from those loads?

Definitely won't hurt - and very well worth trying. Something else to check when the gas block is off - gas port size in the barrel. Not many X-Caliber barrels have been through here (members here), but I do know of one of them that had a gas port that was too small... Had to be drilled up...

Triggers that light are hard to find. Trying looking into Jard. I know they have one that goes down to 2.0lbs, but I only know that because I've had one for years. Super-short reset, which makes it a pain in the a$s to shoot in a semi. If you don't follow through on the trigger pull, it resets and shoots again (still semi-auto, not failing - just short reset...). Another option is the Geissele Hi-Speed National Match trigger. You won't find anything nicer. Might not get down as low in pullweight as you want, but after you shoot it, you won't care. https://geissele.com/hi-speed-national-match-trigger-set.html

Check what Matt said, above - but I'd still pull the buffer out and measure it. If it's really a .308AR rifle buffer, it should be pretty close to 5.200" long.

^^^ Something funky going on with your sights... Hard to tell from the pic. Looks like: Both mounted backwards, and need flipped around. Kick that front as far forward as you can, and get the back one near the end of the upper receiver when it's folded down.

I don't run any adjustable gas blocks on any of my rifles - so, they'll work without adjustable gas blocks. I think I understood you correctly. Port in gas blocks should be 0.125", across the board - that's the maximum gas port size you'll ever find in a barrel.

Right on, man - that is one solid rifle, right there.

https://geissele.com/reaction-rod-ar-10-sr25.html

3 of my large frame ARs are running collapsible stocks, and only one had a fixed stock. On the 3 collapsibles, all parts are the same. Armalite AR-10 Carbine receiver extension, Armalite AR-10 Carbine buffer spring (Part # E1095), and an AR15 Carbine H3 buffer. ^^^ Reliable, consistent, and always performs.

Either on the gas system. 16" will almost always have a midlength gas system, and that's a good combination. On 18" barrels, you'll find midlength and rifle length equally, in a barrel search. I've got an 18" miglength gas stainless barrel from Rainier Arms that is an absolute tack driver, and it doesn't kick like a mule or anything like that. It runs well. 16" midlength gas steel barrel from Faxon, and it is wonderful. Not overly loud at all, to the shooter, even with a 2 chamber brake on the end of it. It certainly sucks for anyone beside me, though... There are a couple more barrels in the large frame ARs I have, but those two above are great examples. A 16" barrel will accomplish what you're seeking, as you stated above - 350 hunting, paper range out to 500... An 18" barrel might give you a little more in the fps range, but not much. The 16" is going to be more maneuverable, for sure, and 2" of extra barrel will affect the swing weight of the whole rifle, during hunting.

Very cool.

Yes. Aero Precision bought Ballistic Advantage, so the AP branded barrels are Ballistic Advantage barrels. You can calculate your specific load data via this program: http://www.jbmballistics.com/ballistics/calculators/calculators.shtml

Make sure you click the YT link on the first one, and read the comments... There were some VERY SERIOUS PEOPLE about this one...

You guys remember this one... The Vortex/Hornady bullet cam. It was announced around 1 APRIL this year... It seems that this technology is WAY too advanced, and it's been classified and shelved, for the time being... ...and, we wait...

For the most part, stainless barrels have shown a greater potential for better accuracy over steel barrels, but that's old school mentality. It doesn't take into account new manufacturing methods, for either barrel material. There are steel barrels out there that are highly accurate, and even mass produced. As long as you get a barrel from a reputable barrel manufacturer, it will shoot very well, no matter what it's made of. The definition of "reputable barrel manufacturer" will typically not included budget barrels that you find on sale for $99, either. I'm talking about companies that only make barrels, and few other items... 16" will get it done. That's plenty of barrel. Depending on the weight of the projectile in the loaded ammo, you'll have enough power to make clean kill shots at 500. Example on loads, 178gr Hornady BTHP projectiles loaded to 2400fps. That's 1100 foot pounds of energy at 500 yards. Lot's of variables in your questions,though they might seem like basic questions. Tons of answers available.

Is this a "guess" contest? What's the prize here? You do realize you posted this in the "Contest" Section, I hope. You won't get many answers here. It would be better if you just recreated the whole topic in another section. Toss the same question in this section, and you'll get more bites... https://forum.308ar.com/forum/48-308ar-parts/

It's still an Armalite AR-10. That stamping of "SPR Mod2A" is only there to confuse California politicians, and make the rifle legal for sale in that state. It doesn't mean that it's a Cali-compliant rifle - just that it was made to meet the criteria for sale into that state. For all intents and purposes, it might not even be a full factory rifle at all - previous owner might have changed all that stuff on it, then sold it on GB. You might be chasing your tail trying to make it "fit" a factory offering, as it might not even be one...

There was also a trigger recall on some of these rifles, but your rifle is not affected by the recall, provided the serial number is correct. So, if you hear about that, don't worry about it.

Some info in this thread here: Where did you buy it?...

Life. No probation, no parole, no reduction/suspension in sentence. LIFE. http://www.foxnews.com/entertainment/2017/05/12/sons-guns-star-will-hayden-gets-life-for-rape.html

I'm calling this one finished. Got the scope in for it, mounted and leveled. Primary Arms 4-14x44 mil/mil first focal plane. I'll leave it in the SWFA Bobro mount. It's done now. Next is to re-zero it with this scope, then dope it all out, put a sticky on the stock, and get some coyotes.

I think this .458 is gonna hurt that bowling ball...