Yes it is ASR compatible.
No muzzle device is included.
It fits both SiCo muzzle devices I own.
Appears that I’tll work with multiple calibers .. 5.56, .308, 9mm, etc. if it’s an ASR mount it’s good to go, fits on all my 7.62 and 5.56 ones and the main hole In the front is plenty big enough for all those rounds and then some..
The ASR shield is definitely a nicer choice IMO plus it has the ASR style locking latch. But it’s also 3x the cost. This one is just a thread on and snug down type shield, nothing fancy. For the cost though, it’s a nice enough alternative…Well worth the price to have around when you want it and offer a bit of noise reduction.. I generally only use blast shields at the indoor ranges here and there and it’s doing the job just fine. It also fits both my 7.62 and 5.56 brakes/Flash hiders. Good to have on the .308 indoors for sure… And unlike the SICO one, I won’t feel bad/wasteful leaving it sit around in a range bag or drawer when it’s not being used on anything.
It is compatible with all ASR thread muzzle devices.