What’s with the 9mm pcc’s and 9mm AR pistols gaining favor for serious work?

[CamoDeafie]

.50 bmg. It'll 1-shot pretty much every living thing,including graboids

 

[titsonritz]

The223/556 was meant to wound

 

[flylo]

It's a poor low end varmint round. They should go with the 6.5 Grendel.

 

[titsonritz]

It's a poor low end varmint round.

It's planted a lot people around the world.

They should go with the 6.5 Grendel.

The bolts would never last the hard use.

 

[Geardo]

My next AR will be a pistol built around a 12.5" Criterion CORE Series.
AR-15 CORE SERIES, CARBINE GAS - Criterion Barrels

When you consider the increased dwell time and velocity over a 10.3/10.5" and even 11.5", I think it is the sweet spot for shorter barrels in 5.56.

Its my favorite length. Both my 12.5s shoot like a dream.

 

[titsonritz]

Its my favorite length. Both my 12.5s shoot like a dream.
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Who makes that dizzy barrel?

I dig those DD RIS handguards, I have an FSP version on a Colt 6920 I plan to tear back down and replace the government barrel with a SOCOM. I figure what the heck it's already a heavy pig.

If you ever want a dedicated suppressed 12.5", Centurion make a mid-length that I hear is pretty sweet. You have to call them as they took it off their web page because too many buffoons buy and try to run it with the cheapest ammo they can find w/o a suppressor.

 

[Geardo]

Who makes that dizzy barrel?

I dig those DD RIS handguards, I have an FSP version on a Colt 6920 I plan to tear back down and replace the government barrel with a SOCOM. I figure what the heck it's already a heavy pig.

Thats a BCM Kino upper. It's a pig for sure but it cycles great, amd if I ever get a MAWl and a PVS-14 it will be my MAWL host due to the rugged handguard.

Slapping the socom barrel in that 6920 is a good plan. I was planning on building an upper like that for a while. Solid, accurate, etc.

 

[titsonritz]

Thats a BCM Kino upper.

That make sense. Did they put on the RIS or did you?

 

[Geardo]

That make sense. Did they put on the RIS or did you?

They did. I Thought about pulling it off and slapping a MCMR on it, but i can't justify rebuilding my 1 and only factory upper.

 

[titsonritz]

They did. I Thought about pulling it off and slapping a MCMR on it, but i can't justify rebuilding my 1 and only factory upper.

I was wondering because that would be a lot of work. Those BCM LPGB are a major pain in the butt to remove.

 

[coop44]

Given some further thought maybe a 10mm pcc would be cool, not blowback, a D.I.

 

[Alexx1401]

Here's some 9mm through a 16" barrel. Buy the right ammo ? Self-Defense Ammo for Pistol Caliber Carbines - Lucky Gunner Lounge

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When I first "heard" of this the Speer +P 124 stuff was what I already had for a "house gun" 9mm pistol. So of course it went into that first 9mm PCC. It sure made me look at that little rifle in a whole new light.
It has been somewhat humorous to hear for a couple decades now people saying the stuff either may not work or will not work as it clearly does because they "heard" someone else speculate. I could kind of understand this kind of "urban myth" stuff before the days of the net but, this info has been easy to find for a long time now. Yet many still keep up the myth <shrug>

 

[Geardo]

Given some further thought maybe a 10mm pcc would be cool, not blowback, a D.I.

They are still borderline.

 

[CamoDeafie]

They are still borderline.

With several 10mm Auto loads being documented as no stronger than .40S&W loads; I'm not convinced that DI gas op would help much
Radial blowback seems better?
Long Recoil (moving barrel) might be easier to keep overall weight light due to mass of 16" steel barrel functioning as the bolt...

 

[Unicykle]

With several 10mm Auto loads being documented as no stronger than .40S&W loads; I'm not convinced that DI gas op would help much
Radial blowback seems better?
Long Recoil (moving barrel) might be easier to keep overall weight light due to mass of 16" steel barrel functioning as the bolt...

Thats olny beacause companys cheap out on the 10 mm ammo and load it to 40sw specs, real 10mm is a solid round and very comparable to 357 mag

 

[Alexx1401]

With several 10mm Auto loads being documented as no stronger than .40S&W loads; I'm not convinced that DI gas op would help much
Radial blowback seems better?
Long Recoil (moving barrel) might be easier to keep overall weight light due to mass of 16" steel barrel functioning as the bolt...

That could sure be interesting to see if someone comes up with something workable. Of course the one big problem is with the market so unsure not many are going to spend a lot of capitol for the R&D. Sure sounds like it could make one hell of a nice system.
I have one PCC that is 10MM and is of course blowback. Uses a standard AR Mil-Spec buffer tube but no buffer, just the spring. They use a VERY heavy bolt group instead to work with the buffer spring. Using a Mil-Spec AR stock it's very easy for me to shoot. It certainly lets you know it's there but with hot defense ammo it's still very tame. Now if they could shave a good amount of weight off it? Hell always nice. Co that made it makes a pistol version too that of course takes any of the AR braces. It was a hell of a nice idea as you buy one gun from them, does not matter caliber, and you can buy the stuff from them to make it .22, 9mm,.40, 10mm, 357 Sig, and .45 ACP. The pistol version they make is the same. Buy one and you can have all the calibers with the same receiver. If the guy who makes them was not such a poor business person I would be tempted to buy one of the pistol versions too. Since I already have the bolts set up for both 10mm and .45, I could just swap to either of these on a whim with just an extra barrel.

 

[coop44]

Could go with 40 and just load them up "spicy", make it a blowback.

 

[CamoDeafie]

Weird concept idea, probably already being prototyped

Fixed barrel, about 16 inches
Rotating bolt head (like the radial blowback system)
Carrier is concentric with barrel; the bolt head is at the rear; just like a handgun slide.
Frame can be based on any existing pistol grip system; for various magazine-in-grip types.
It would be a single tube design much like a Sten, Sterling, Mech-Tech with the difference being instead of mass delaying blowback, or a tilting barrel blowback, it would be cam locked?

Not 100% sure how easy it would be to build though. It probably would look very similar to the Mech-tech carbine kits.

 

[powermad]

I don't know about "serious" work but they are are seriously fun to shoot.
I just pumped 500 rnds through the one I put together earlier this week.
9mm NATO, M1152, 147gn Blazer Brass, 124gn HST and 147gn HST.

Endomags worked flawlessly.

Got a linear Comp and a better BCG from KAW Valley coming in.