L3i muzzle cap

This is a muzzle cap to cover the muzzle of the L3i drop in barrel for a CZ 457.
This is to accommodate the idea of regulating the internal temperature of the barrel between sessions/stages, to avoid a cold bore shot on the next stage.
The barrel has a diameter of 1.18". I made the inner diameter 31mm to allow for some wiggle room, and not have things too tight.
I accounted for accidentally forgetting to remove the cap by adding a 10mm diameter hole in the center, to be covered by masking/painters tape.
I also added recesses for 5x5x5mm cube magnets to hold the cap securely to the muzzle.
Printed in PLA to test, may go for something more UV resistant in the future.