Great silencer in my opinion. Just took it out for the first time and it performs well on my SCAR. An inner barrel is not needed in order for this silencer to function correctly (at least for me). None of the BB's were hitting the inside and falling short. Even with my hopup over hopped it performed as needed.
Pros:
Lightweight, no unnecessary weight added to the front of gun
High-grade aluminum constuction
VERY stable on the front of my gun
precision threading
comes with adaptor for CCW or CW threads
Cons:
None, haven't run into any
I would definitely recommend this to a friend as it works perfectly as advertised. Great price too!