These are the small parts you can use to make your project better
Arduino Base
Install the Arduino into your target holder with this base plate. Provides mounting studs and USB cable strain relief

Arduino Cover
Plastic cover to protect the circuit

Sensor Base
Single assembly that holds all of the sensor at the correct distance apart for a Pistol Target

ESP-01 WiFI Mount
Simple pad to securely attach the ESP-01 for WiFI applications

Sensor Mount
Sensor mount that attaches to the sensor base. Print four for each target.

Face Sensor Mount
Face sensor mount that connects the microphone to the face plate while shielding from ambient sounds.
Needs V3.8.3 or higher

LED Strip Attachment
Holds the LED strip securely in place. Print 12 recommended

Download the zip file below which contains the STL files for each of these pieces.
Extract the part you need and print it yourself, or send it to a service bureau.
Sensor Cover
Small plastic cover to protect the circuit

Simple Piece Parts
This selection is the basic parts needed to hold the target and mount the sensors onto your target holder