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More on this, and entirely my own opinion, 100% and then some. The Mk12 was entirely designed around a certain load, a certain projectile, and a certain distance-to-hit ratio. Again, all my opinion - the Mk12 is the most perfect AR15-type gun ever developed. Nothing else in 5.56 will ever beat it - unless you come in here with some F-Class benchrest junk against it. Never has a better combat weapon ever been refined - the Mk12 is the pinnacle of 5.56 refinement.

He just can't contain himself... This is fucking EPIC... Wait for the SHOT Show report, fuckers. Rob, Greg and me are attending, as well as @JBMatt - pure chaos...

Wait for the blog in TFB about that one - That's "50 Shades of Gray" right there...

That's MY Shockwave, sent as the prototype to "mock things up..." Fucker teased me on the phone and told me that I had to WAIT FOR IT, AT SHOT,to see it... Busted, Rob... BAD BUSTED, brother... VERY GOOD CATCH, DOC!!!

Very badass article on the Mk12 from Monty LeClair. Very read-worthy, with a ton of great links in the article - it'll send you down that rabbit-hole, I'm warning you now... https://www.arbuildjunkie.com/mk12-spr-navy-seal-monty-leclair/ Here's another one - linked from that article ^^^ https://www.officialjackcarr.com/mk11-12-an-urban-snipers-best-friend/ Might as well just bust it all out... Here are the vid links from that article... ^^^ For the record, on the comments on that one - Vickers states, "Now Monty, you've got an interesting point, as far as you know the Navy never used any of the Mod 0 guns..." Monty states, "That's true, I've never seen any of the Mod 0 guns,... /clip/ ...the only ones I've seen in the inventory are the Mod 1s" Completely true Navy-wise, but that's not what Army did. US Army Special Forces started the Mod 0, and used them (5th Special Forces Group developed the weapon, from it's conception - as well as the "Mod-H", or the Mod-Holland, the 16" variant). 5th Special Forces Group started the entire concept, from soup-to-nuts, and got it rolling in the first place. US Army Special Forces use the Mod 0 - US Army Rangers use the Mod 1, and not the Mod 0. 5th SFG(A) further refined the gun to the 16" barrel, and that was the Mod-H. PRI (Precision Reflex) did all the mods of those gun to the Mod-H - PRI converted them. PRI built most of those Mod 0 guns in the first place, even though NSWC Crane was the proponent for the platform. Crane didn't assemble them - PRI did. PRI 100% did all the conversions from Mod 0 to Mod H, on all those guns. Just a piece of history. Just for the record...

Early night vision!....

This would be directly opposite of what really happens. DNP is on it. Dwell time. The longer your dwell time, the harder the recoil, and the more punishment on the cyclic components. Think about a gun with an 18" barrel, midlength gas or rifle length gas. Or carbine gas. The distance from the gas port location, to the end of the barrel, is "dwell time." That's the total amount of time that the barrel is feeding gas pressure to the bolt carrier, and it's also the amount of time that the barrel starts feeding gas pressure to the bolt carrier. You start the unlocking process too early, and you have BIG problems on your hands, as far as function goes. So, the closer the gas port is to the chamber, on a given barrel length, the sooner is tries to start unlocking the bolt, and the longer it provides "propulsion" to the bolt carrier. 18" rifle gas is gonna be the "softest" shooting. Moreso than 18" midlength gas. 18" carbine gas is gonna be a handful, it's gonna beat the shiit out of components, and beat your shoulder up. Now, think about trying out something with 18" pistol gas system - that's gonna SUCK to shoot, and you'll be breaking internal reciprocating parts in short order. The closer to the end of the barrel that the gas port is located - the larger gas port you need, to function the rifle. Recoil systems play heavily into this - the gas system and recoil system are independent of each other, i.e., you have carbine gas, doesn't mean you have to run carbine recoil systems. They're not tied together - but they MUST be balanced, and WORK together...

Ballistic Advantage Modern Series, Mk12 profile, 5.56 chamber, 1:7" twist. 18" 5.56 SPR Rifle Length AR 15 Barrel w/ Ops 12, Modern Series This one: https://www.ballisticadvantage.com/18-inch-556-spr-rifle-cmv-modern-barrel-ops12.html Gas port diameter is 0.095", 18" 5.56 barrel, rifle gas. This is very close to what an 18" rifle gas .308 Win barrel needs to be. Here's the barrel referenced:

That's a beautiful work of art, right there. I keep staring at the magwell on this one, Doc - that's so smooth...

Okay, we can deal with that. What about gas port diameters and recoil system details?

Here's the follow-up article from the next day: https://thebfd.co.nz/2020/01/trust-in-police-destroyed-by-politically-motivated-raid-against-young-family/

That's the Affliction. That's what we spread, brother. #31 is going together in a few days. Because.

Too late - you can't un-see it... 🤣

For the record, there's NOTHING about a beaver that is NOT SERIOUS. I'm just sayin'... Beavers are fuckin' SERIOUS. I'll paint that motherfucker, my brother.

Ron R2 is still on the hook for trapping us with the Monkey Shoulder... That was evil...

Gawd Dayum right, she is. For those that don't know, she'd whip this guy's ass growing up, chew his ass as he was older - and she'll STILL dig into his ass right this second, if she thinks he's doing something wrong. That Little Woman has no fear... She'd whup Jesse right now if he was doing something wrong... She's a fireball...

This is so awesome on so many levels - did the kid realize who it was that was helping him get this rifle together? That just blows my mind, thinking about that...

Did you hear bout the other .50 yet, brother? I'm not sure that I should say anything until next week, so I won't.

It's Nut'Scaping, brother. Have you heard of this yet? It's trending now, apparently. Rob is Nut'Scaping us with this stuff. That's where you take pics pf beautiful landscape - but there's a ballsack hanging in the pic... We're being Nut'Scaped...

Fuckin' NERD MAGIC is what I call it. Math is the greatest weapon that we have. You just need to know the math to use, for the application that you're trying to do. That's the truth that I try to spread, everytime we all get together...

You were Jameson (and that's alright) and you were Krakken... We loved through that, at your direct responsibility. JBMatt was that sweet, sexy Salted Caramel Crown - and we lived through that. The guy that brought the Hennessey to the party was Mike. All this lies at his feet... Just like when he brought that Chinese rice-wine to the party a few years ago... It smelled like perfume, and it tasted like old gym socks...

It definitely will - we prove that daily by taping receivers for the takedown detent, and cutting the spring by the length that the 4-40 set screw is. It works. That receiver is gonna be tough, and I wouldn't want to drill into it,after looking at it - that's a sexy receiver. I'd measure a detent, cut that much spring length off it, and just go to it from there. Detent springs are cheap,in the larger picture here. Cut a spring down, insert it, put that new detent on top, and pin the pivot pin. If it feels too strong, take the pivot pin back out and cut another coil or two off the spring. That's gonna be the safest bet, with this receiver. That's what I'd do, if I were in these shoes... Just cut springs...

Why don't you just post something about guns, on a gun board, William. Why don't you try that for once? Or, maybe just point me to where you've already done that here, on this board... Link the threads,if you can find them. There aren't many. Here.

Pic of the lower, for others: P.S. Fuk Photobucket.

You're stuck, man. Would you consider drilling a hole, if I told you how far back it had to be, and how large it needed to be? I can run the numbers, and you can drill a vent hole - that should have been there in the first place... You drill that hole, and you can blow that stuck-chunk right out of there, and start over. Birchwood Casey Permablack will get you by covering it, and no one will ever know it was done.