98Z5V

That kick, and the "3 Inch Drop Test."

You are specifically referencing the technology that is new to you. But, whatever. Drive on...

The too-small gas port in the barrel is the "band-aid" used in order to run a cheaper $$$ recoil system, that will probably work for most of the people, most of the time, with most of the cheap ammo out there - even though it feels harsh. An inexpensive gun has to cut corners somewhere,to appeal to the masses. 7 5/8" internal depth receiver extension, the extra tungsten in 3.250" H3 buffers, and a more expensive, proper, .308AR recoil spring cost more money. It's easier to use AR15 parts that you already make, recoil spring included. To make it run like that, not beat up parts and destroy shoulders, your "band-aid" and compromise is making the gas port too small. Restrict gas the cheap way. Most people mis-diagnose this thing, and say it's "over-gassed" and just add an adjustable gas block. So, how is it over-gassed, when the gas port diameter isn't even near what should be in that barrel config?... It's not over-gassed - it's under-recoiled, based on money. Everything about those guns is money-driven, and doesn't follow the design or operational characteristics of the original platform at all. It's all about money, and making the cheapest product that you can, from decent materials. The materials are good - the execution of the "making of the gun" is all about the bottom line, and an inexpensive product.

Recoil system has been changed, completely. Before, it "felt over-gassed" because it was under-recoiled. Too small of a gas port, at(probably) 0.070", so "over-gassed" isn't an accurate description, and not even possible with a gas port that's too small. Under-recoiled is a very accurate description, and why it felt harsh to shoot. Now that the recoil system is up to snuff, it won't cycle fully, because that gas sport is still too small... Drill time, 1/4" wooden dowel down the barrel when drilling...

Looks like you got the hang of it, brother - that's excellent!

You will love it. Here's the Ghost Load procedure. He does it a little different than I do, but this still works.

We replied at almost the same time. Well, if your gas block is wide open, and it's not working, the only other thing that can constrict gas flow is- gas port diameter. Too small. Since you already have the adjustable gas block - and a good one- here's what I would do, if it were mine. You need a range of 0.080"~0.085" for that barrel config to run properly. Maximize use of the adjustable gas block that you already have. If it was mine, I'd drill it to 0.090" and dial the block down to function properly.

IF it's the 18" barrel with the 0.750" gas block diameter, it was never overgassed. The gasport will be 0.070" on that particular 18"barrel, and it's too small. It needs to be 0.080"~0.085", for that 18" config. It was never overgassed - it was under-recoiled, straight from the factory. Buffer weight too light, spring too weak, right from them. "Not enough ASS to control the MASS." Not enough buffer weight nor spring pressure to control the mass of a .308AR BCG and the pressure of a .308 Win round.

The gas port is too small. Period. Time for the drill bit. What's the configuration of the barrel, i.e., 18" midlength gas, whatever. I already know it's midlength gas, based on the gas tube you used. What's the barrel length? I'll tell you what the gas port diameter should be (range from min to max).

Armalite AR-10 firing pins have the same profile, man. Just a little different in dimensions because of the firing pin spring.

I've got a 13.5" Armalite barrel and a 3-port brake pinned to it to get it a tick over 16", and it's actually (surprisingly) pleasant to shoot. Shocked me.

Very interesting observation, and very good catch. Interested to see if it keeps deforming. Even on super-high round-count issue M4s, with shot out barrels, I haven't see the firing pins mushroom like that.

Which ones did you get - 2 x .308 barrels?

My stripped DPMS lower receiver that I bought in 2010 had a threaded pin for the bolt catch installation. Not long after 2010, SI Defense made alot of money making a higher quality threaded pin to replace the "stock" DPMS one - which were prone to cracking if you over-tightened them. Your giant "reveal" here is not new technology, neither in the threaded pin for the bolt catch, nor the mods that we've been doing for more than 10 years for the takedown pin "mod.". You announced this like it's some great breakthrough - and it's decade-old news, just new to you. Think what you want, but you're not breaking any new news to anyone that's been in this game for more than a minute. Here's a DPMS LR-308 stripped ("K") lower receiver - take a look: You are adamant that this thread is about Aero Precision. Yeah, we all know about Aero Precision, very well, here. However, the technology that you're talking about is WAY BEFORE anything Aero Precision did...

All I did was point out something you said, not accurate. Then you got all elaborate about other stuff that's common knowledge for 10 or more years. Cool. Have a good one.

He has a hot box of ammo from S&B, and he's chasing ghosts, trying to blame it on hardware. Not the first time there's been a bad batch of ammo from S&B, with the latest we've heard is the 300BLK jackets coming apart in @jtallen83's suppressor. What I gained later was that he has a chrono number, but I asked him if he had chrono numbers on what he was shooting. The chrono number he posted was pretty low, for a 140gr 6.5C load - barely middle of the road on powder charge will yeild a velocity number like what he stated. And that chrono number he stated, if real, was 700 or 800 rounds ago, as the info came out from him later. If he's smart, he'll save some of that ammo that's puncturing primers, and run it through a chrono. 300 feet, 1600 feet - not gonna make the difference he's talking about. We had guns and ammo from sea level (Boston, Mass) shooting at 4600 feet (SV, AZ) with zero issues and no punctured primers.... It's not the elevation, it's not the BCG or firing pin protrusion - the BCG and firing pin protrusion have been teh same this whole time. It's the bad box of hot ammo from S&B, but the OP doesn't wanna hear that. Now, he'll argue his 1/4 MOA adjustments again, on his mil-reticle scope, tout how superior his "finer" adjustments are - while he sets his digital speedometer in his car to km/h, converts in his head as he drives, just to "stay sharp" on his conversions. He probably uses nothing but metric tools on all his standard hardware, and does the math in his head before he works, just to keep his edge... My $0.02 on all this mess... He has a hot box of ammo, and doesn't wanna admit it. He wants to find a problem with the gun to explain it. It's the same ammo. It's not the same lot number over 700~800 rounds, unless he bought a few cases at the same time. Even if it's the same lot # - he's shooting a hot box of ammo...

Hit that one above... ^^^ This is the same guy that talks about the superfine 1/4 MOA adjustments that are superior when using a mil-dot reticle.

Also, says this, brother...

It IS a word, brother!!! All PNW people say "BOLTH" when they're talking about the two of them... I gave my girl and her two kids hell about that for 10 years, whenever they'd speak...

If you would have answered my previous question, I'd probably have an answer for you already. SAME LOT NUMBER ON ALL AMMO, OR NOT?... Hopefully, you saw it that time...

Then post your tests and verification. Post your empirical evidence, Jack. Post your proof. Show me the money, post your data. I'm sure Hornady will want to talk to you about it, too.

YEAH!!!

^^^ My brother is SO PNW it's not even funny... Once he falls over, it's gonna take BOLTH of us to get him back up...

Thanks for the info - I don't even know how many AP receiver sets I have, I'd seriously have to get the guns out and count them. What I was stating was pretty simple - #1, the bolt catch that you were referencing is not 4-40, though you stated that. Not true. #2, you can do this to ANY AR lower, no matter large or small. I was stating how to do it with a 4-40 tap, or with a 6-32 tap if 4-40 set screws aren't available to you... You seem to be confused, telling me all about the AP lower you got. We were drilling and tapping these things 10 or more years ago - and finally a company came on board and started tapping them before any of you even received them, tapping them right from the factory... That make sense now?...

I even got Rob hooked on it...