Externally I have to give the PP-19 a 9/10
It is build extremely solidly, and nothing at all moves. The stock once locked has absolutely no wobble,
The handguard is solid as well as the magazine. This is sturdier than my 3 VFC's. The part that moves the most is the charging handle, and its supposed to

Also the fact that it is made of steel is also a plus. Also, the prongs on the magazine are reinforced with metal pieced on the inside of it which reassures that
they won't break quickly. The reason I give it a 9 is because the finish on the metal is kind of cheap.
The paint isn't even on the parts and chips easily.
In terms of performance I would give it an 8/10
There isn't anything special about the performance. On a 7.4v lipo it shoots between 353-357 fps at 12 rps.
In terms of rate of fire it is ok. Also when loading the magazine you have to make sure you press it into place correctly or it wont feed right.
That's not a biggie because all you have to do is smack it a little when you put it in.
Overall I would still give this gun a 9/10 because it is unique and built extremely well for being Silverback's first aeg.