[id10t]

Originally Posted by scottmandue

I am thinking about adding something to a off the shelf 9mm carbine and I know it is totally unnecessary but this is SoCal and we are obsessed with customizing anything we can get our hands on.

But I don't want to tick off my indoor range-mates by bringing in some loud azz carbine.

I will have to study up on what is legal in Kalif.

Was eyeballing these:

https://www.ebay.com/itm/163034313111

https://www.ebay.com/itm/362311203636?var=631515527712

This guy seems to think the KAW vally compensator is legal in Calif. but that is just his opinion:

California Gun Ownership: Muzzle Devices » OpticsThoughts

Skip it on a 9mm carbine.... those are primarily intended for the rather short barrel AR "pistols" that you see, and yes, they'll help control blast and flash. Might wanna look for a KAK "flash can" as well. Same idea.