There strange guns.. They feel even more strange to shoot. Friend had one that he sadly ended up selling without telling me it was for sale. Its got alot of muzzle flip on it because of the "Bullpup type" setup with the grip in the center. Its also VERY rear heavy when loaded. We shot about 400 rounds out of it and it worked fine. The best way to shoot it is use the back of the weapon as a stock but it does not feel well it was VERY loud and had a mean muzzle flash close to your face.
I never got the chance to take one apart but it did feel well made.
If I found one for a low price id be tempted but its mainly just a curiosity because its not normal. (I like unormal weapons)