.- Marked K31 front sight blade for K31 front sight post. Approximately 3.3mm height of the blade measured from the high point. Used to enhance or fix POI and sight picture. This will change your POI you must re zero your rifle.

May require fitting

Different than the standard non marked K31 post. The standard is 3.8mm and can be found

W+F Bern K31 & K11 Front Sight Blade for Front Sight Post (Standard non marked)

.- Marked – Indicates about 3.3mm sight post