ZKM 451 Picatinny rails convert the 11 mm receiver dovetail into a universal Picatinny base, so you can run modern rings, one-piece mounts, and red dots with Picatinny adapters.
Why add a rail?
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Universal interface: straightforward fit for scopes, micro dots (with bases), and night/thermal devices.
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Repeatable zero: cross-slots resist shift and make optic swaps easy.
Fit & material
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Model-specific: choose a rail made for the Brno ZKM 451 11 mm dovetail (clamp-on or screw-on, depending on the maker).
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Aluminum vs. steel: aluminum minimizes weight; steel maximizes rigidity and thread strength.
Install tips
- Degrease the rail, receiver and screws; apply Loctite threadlocker.
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Torque to spec in a criss-cross pattern; witness-mark and recheck after your first range session.
- Verify screw length/pitch so there’s no bolt or barrel interference.
