Originally Posted by Fire_Medic
I ordered the white sound defense assembly from them as well.
I would be curious to know how the WSD system works for you. Some people seem to think it helps, others not so much.
If the backward assembly doesn't work out, you may want to keep the 20% extra power spring. I'm pretty sure that will help at least a little. You can use the spring with the Glock SLB and EDP.