Ammo costs. Paper is easy to kill, so is steel. Quieter.

Put a few more mags through a MP5SD, then reevaluate.If it was available and not too expensive I think it would be the king of the PCC`s

I don't use them, but what I hear from people that like them has to do with carrying one type ammo and magazine for a rifle and pistol. Sort of modern day version of single action and lever action shooting the same cartridge.

They are fun, for one. These days there are quite a few mew subgun designs and the only way for us non SOT holders to play with them is a Semi auto PCC.

I’m not sure I understand your muzzle blast as a bonus comment. Concussion and noise are the two biggest reasons I like to play with suppressors. I wouldn’t want to shoot anything indoors with no ear protection but you dump a few rounds from a 10.5 AR and you’ll be feeling it and (not) hearing it for awhile. 9mm would be much better for that use if need be. I’m not saying a short pcc is better than a short AR, but when you suppress them, I will say any pistol caliber is much better. Yes you can suppress a 5.56, it’ll still be louder and blastier as well as general minimum for a 556 can is a 10.5” barrel. You can drop a 9mm down to near nothing and still be safe to suppress it, plus most pistol cans are aluminum vs steel of a rifle caliber can. I do t see any reason to shun one over the other. They both have their uses for sure.

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https://facebook.com/M2bKydex/

& training with several very experienced friends, they all touted the Pistol Caliber Carbine or subgun for Indoor use. As Doug says; they suppress easily. Even unsuppressed, they are quieter than an unsupressed AR in 5.56 or larger rifle caliber. These men also spoke of friends, forced to retire from a single shooting indoors, due to permanent disabling hearing damage...
That go me thinking about it and I bought a CMMG 9mm it uses Colt 9mm mags, and a PC 9 converted to use Glock mags. I should have got 2 PC9s, but I like these both.
Jan enjoys shooting the PC9 and recently took it to Gunsite and did well with it.
I SHOULD have possession of my 3 of suppressors from John Killabrew next month, so, THAT will add to the fun and usefulness.

easier on the ears

cheaper to shoot (Retaliative now)

Fun

Handier and higher cap than a shotgun

NOT a .41 mag... J/K

I hope you are doing well.

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Of the Troops & For the Troops

I like them for my purposes...

I shoot a bit of 9mm and have a few 9mm handguns... I also shoot and enjoy my M1 Carbine as a "short rifle/carbine"... it was a gift to me from my dad (Korean vet) ... so I combined the two... I have a original 30 cal M1 Carbine and a 9mm M1 Carbine... true it's not original to a M1 but it works and it looks a bit better (to me at least) than a AR platform 9mm and a bit cheaper than other 9mm carbines sans the Hi-Point 9mm 995 carbine... I also shoot a 1911 in .45ACP and might pick up a .45 ACP carbine in the future (almost got a M1 Carbine conversion on GunBroker that was chambered in 45 Win Mag)...

An AR is fine but just not my cup of tea... maybe a AR pistol setup in 300BLK but not 5.56...

For me, a PCC specially my M1's make a good showing for what I use them for... the 9mm M1 makes for a fine up close around the house weapon.. the M1 original Carbine (tho not technically a PCC)does just fine out to about 150 yards for critters (4 legged and 2)... and around my farm, that's works for me... don't need to reach out beyond 150 yards, lots of hilly forests...

So... do I like PCC's? ... to some extent, yes... are they useful? ... to me, yes...
can a short (pistol) or carbine AR do the same job? .. yes but not my cup of tea..

And if and when an "assault style" weapons restriction come down the line... my M1 Carbines are not "assult syte".. and at least the original M1 Carbine is an antique..

I have a Kel-Tec Sub9 that uses Glock mags and a Mech-Tech 1911 upper in .45ACP. The appeal to me is fun (and cheaper) to shoot. In the case of the Sub9 it fits in the bottom drawer of a nightstand when folded.