Yes it is. It is very secure, but you have tie them with something to the pals on the mid section if you want it angled. Otherwise it will flop around too much. I used ziptie.
Around 29 shots at 21C.
The blowbackunit is very, very tight fit in the steel slide. It does not need that screw. I wouldn´t want to take it apart any time soon
The rear sight needed some minor material removing from the base. Nothing that a dremel can´t handle. Front sights base is too narrow so it must be glued on.
It fits with a bit of modding. Guide rails needs to be filed down 1cm or so.
Yeah, couple minutes with a dremel. Little bit of material removal is needed.