anyone had experience with these? they are cheap, seems too good to be true but i'd love to have a compensator/muzzle brake without having to permanently attatch it. i've heard good and bad things, some say they have never had a problem though, maybe theres a good brand?

Never heard of them.Do you have a link? That said, they are not sufficient to satisfy New Jersey's requirement for a permanently affixed device (assuming you have a threaded barrel of less than sixteen inches in length).

heres just one that i've seen

 

http://www.amazon.com/AK-47-Muzzle-Break-pin-on-type/dp/B000BD131G

 

and no, it is a 16 inch barrel. therefore it should be alright, no muzzel threads, no flash hider.

It sounds to me, then, that you are legal as is, so this device should not disqualify your AK. Did you note there is but one review and it was called 'unsafe'? But, to each their own!

just figured it wouldn't hurt to ask. thanks.

Agreed - and I am no expert! Let's see what those in the know have to offer

I'm no expert and wasn't sure if legal or not so I posted a similar question a few months back. One of the senior members replied back and said "bolt-on" was in fact NJ compliant. I have this one on my 308, it was pricy but it works nicely and I like it.

make sure you comply with 922r with US parts count.

They have to be made with enough slop to account for different rifles and enough slop to allow it to actually slide over a muzzle. And we all know how consistant these rifles are...

 

So with enough slop to account for all that, there is no way they will ever be center. So they make the muzzle exit bigger so you dont strike. That basically renders it useless because you dont get as much pressure going out the vents.

 

Not to mention its going to be off center so it will screw up your accuracy. So you will lose more than you will gain, especially when it launches off downrange

Wish I could find the video, one time I saw a video of one of these where a bullet impacted the device. Like glenn said, they need to have very loose tolerances to fit any rifle, and red locktite melts a lot sooner than you think, considering how hot your muzzle gets. And it doesn't take much vibration to work bolts loose. Your rifle produces both lot of heat and vibration.

 

Anyway, the bullet impacted the device, blew it to shreds, and chunks of metal flew in every which direction at a couple thousand feet per second. I'm sure it was an enjoyable, safe experience for all in the vicinity of the shooter.