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As I'm in the market for a 9mm carbine, I took a look at this model. The thing I don't care for in either this one or the Kel-tec is the lack of a suitable (for me) rear stock. Also, on the S&W the magazine holder on the rear stock appears awkward to access.

But compared to the Kel-tec It seems better made and that you can keep the optics on the gun when folded is a plus.
 

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Looked it over. Neat the way it folds. Neat the way it has mag. storage in the stock. Neat the way it uses M&P 15 round and larger magazines.

Seemed decently accurate after watching/listening to it hit 10 straight metal targets at 100 yds., standing position.

I've already got a couple 9MM carbines (AR variants that used the Colt style 32 round magazines.) I'm still gonna take a look at the specs/prices for this one.
 

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Very interesting take on the 9mm PCC genre. Certainly a better firearm than the Keltec. However, every time that guy in the video violently snapped it open and closed I winced! It reminds me of the jerks on TV or the movies who flip a revolver cylinder open and closed. It can't be good for any gun to be treated like that.

As to other calibers, 9mm sells in by far the greatest volume and at lower cost than any other centerfire pistol cartridge. Ruger makes their PC Carbine in .40 S&W and I expect its sales are a tiny fraction of the 9mm models.
 

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The one thing I wonder about is what a 16" barrel does to velocity. Does the velocity increase till the bullet leaves the barrel or does the friction between the barrel/bullet eventually start overcoming the rapidly decreasing gas pressure?

My AR15 looking carbine only has an 11.5" barrel with an XM177 (clone) flash suppressor pinned/welded to make it just over 16". So 11.5" of effective barrel. I use a slow burning powder in my reloads (Blue Dot) so it burns longer than the more common fast burning powders used in factory 9MM ammo.

Just mildly curious. Sixteen inch barrels with 9MM may be fine.
 

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Discussion Starter · #15 ·
The one thing I wonder about is what a 16" barrel does to velocity. Does the velocity increase till the bullet leaves the barrel or does the friction between the barrel/bullet eventually start overcoming the rapidly decreasing gas pressure?

My AR15 looking carbine only has an 11.5" barrel with an XM177 (clone) flash suppressor pinned/welded to make it just over 16". So 11.5" of effective barrel. I use a slow burning powder in my reloads (Blue Dot) so it burns longer than the more common fast burning powders used in factory 9MM ammo.

Just mildly curious. Sixteen inch barrels with 9MM may be fine.
In the first video, he claims that 9mm hits with the force of a 357 (from a handgun) when shot out of a 16 inch barrel...
 

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That's Star Wars, or Star Ship Troopers looking stuff right there.

I wonder what the increase in velocity does to the bullet expansion/penetration the newer 9MM hollow points are designed to do at the standard 9MM velocities. I'll have to look up some youtube videos to see if anyone has done some to test it.

You know, some of those older .357 magnum 125 grain hollow point loads were pushing up over 1400 fps out of the 4" revolver barrels. Kind of surprised me when I saw some of those chrono results.
 
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