My little 4 axis was built to make this kind of parts; it's now in full production
This is a 1/32nd scale MG 13mm cannon from a ME 109 G6 (cowl guns)
3 parts make up the complete gun; all cnc cut; the 4 axis did the holes as you can see


0.5mm dental burr at 3000rpm 40mm/min feed; 0.695mm spacing staggered row to row 1/2 pitch
6 rows by 9 holes; then 10 rows of 3 holes on the bigger diameter

before assembly

drilled to scale of course