Feinwerkbau Smoke 20mm inserts for 22mm Sight 2.8 mm up to 5.8mm #1780.8xx.x

These are actually 20mm in diameter and 18mm at the step down
These are used in the what is called 22mm or M22 foresight sold by various manufacturer like Feinwerkbau
Genuine Feinwerkbau part
Size range from 2.8 up to 5.8mm*
Size is Laser engraved on each insert
*If you need a size not in stock, please let us know, we can order what you need at Feinwerkbau