How many parts are compatible with it?

28, including "PK-06 Collimator Sight" and "Periscope Hybrid Sight."

Can a holographic sight be mounted on it?

Yes, the "Holographic Triangular Sight (4x)" is on the list of compatible items.

For mounting sights on the MK14.

Specialized MK14 rail from Break Point Zero. Designed for mounting sights on weapons of this family.

No numerical specifications are provided for this part.

The rail can accommodate, for example, "", "", "" and "", with a total of 28 compatible parts.

Плюсы

Минусы