[slayerfanx55]

1. Will the Modify 8mm gearbox fit in a G&P SPR type A Metal body?

2. Which selector plate is the best? G&P, King Arms, or Guarder?

3. What's a good piston for DMRs I plan on using a 500-550mm barrel, and either a systema M140, or M150, I don't plan on going auto much, so one of those swiss cheese pistons aren't really necessary, I'm looking for the best compression?

4. Aluminum or PolyCarb piston?

 

[WorstInFinlanD]

Shs full teeth piston is fine for that, I've readed that super shooter is like better brand but from same factory as shs, but I'm not sure.