Quantity   Component name
1 × custom SMD Arduino/Waveshield hybrid (all-in-one) created Arduino and Waveshiled merged onto one tiny board
2 × MAX7221 chips
1 × Misc. resistors/caps
1 × MicroSD card/socket
1 × 3-digit 7-segment display numerical ammo counter/display
1 × Custom made bargraph use for ammo depletion
1 × Misc: Speaker, switches