s1mba93

Hey All, I'm currently making DC17m blaster rifle and trying to find an DIY electronics system for it. I'm also new to a lot of this so apologies in advance but had a few questions, Is there any chance this works with a 3 digit 7 segment display to show ammo count? Can the aux switch be a magnetic like switch for registering a reloaded mag? Any advice would be greatly appreciated! Thanks