It can not stop the bolt when I remove the empty magazine.
From the picture,We can seethatthe front part of the bolt stop is very thin.
There is about 1MM dfferent from the rear part.
This 1MM is critical,it makes the magazine can not push up the iron block to the postion it supposed to be.
This is the reason why it does not work.
I bought this brand new gun from CanadaAmmo.
I contacted them for many times,there are no reply at all.
I'm still waiting.
If you can't see the picture above,you can go here:
http://www.flickr.com/photos/45781126@N00/7179968173/in/photostream/