Offset Adapter Plates for BH 11mm Rings: Key Facts
By Precision Optique | Published: 2026-10-25
Category: Buying Guides
Learn what offset adapter plates do for BH 11mm rings, how to choose the right offset, and which models offer the stability you need for your rifle setup.
Quick answer
An offset adapter plate lets you shift your scope forward or backward on BH 11mm rings to achieve proper eye relief or clearance. Choose a plate with the offset distance that matches your setup—50mm is common—and ensure the rings you already own are compatible.
Why offset matters for BH 11mm rings
BH 11mm rings are popular on air rifles, rimfires, and some hunting rifles, but the ring position on the rail is often fixed once the rings are clamped. An offset adapter plate (sometimes called a plaque d'adaptation déportée) adds a machined spacer that moves the scope forward or backward, giving you the flexibility to center your eye without swapping rings or drilling new holes.
The trade-off is added height and weight. A plate lifts the scope slightly, so check that your cheek weld remains comfortable. Also, the plate itself needs to be securely attached—loose hardware here can shift zero.
Offset distance and compatibility
The most important spec is the offset distance (how far the plate moves the scope). A 50mm offset is standard for many setups, but your rifle and scope combination may need a different amount. Measure your current eye relief and the available rail space before buying.
Also verify that the plate is designed for BH 11mm rings specifically—some plates are made for Weaver/Picatinny and won't fit. The two Precision Optique plates below are both intended for BH 11mm ring systems.
How to choose the right offset plate
- Measure your eye relief gap: Mount your scope in the rings without a plate. Note how far forward or back the scope needs to be for a full, shadow-free sight picture. That distance is your required offset.
- Check rail space: Ensure the rail has enough length to accommodate the plate plus the rings. A 50mm plate adds roughly 2 inches of hardware forward of the rear ring.
- Choose fixed vs. adjustable offset: A fixed-offset plate (like the 50mm model) is simpler and more rigid. An adjustable or multi-size plate (like the Plaque d'adaptation décalée) gives flexibility but may add complexity. If you only need one specific offset, a fixed plate is lighter and less likely to loosen.
- Confirm ring compatibility: Both plates require BH 11mm rings. If your rings are Weaver/Picatinny or dovetail, these plates won't work. Rings are sold separately. Check your ring base type before ordering.
Products at a glance
- Plaque d'Adaptation Déportée pour colliers BH 11mm: Plaque d'Adaptation Déportée pour colliers BH 11mm with 50mm offset. Rings not included. A dedicated 50mm offset plate gives you predictable forward movement; you just supply your own BH 11mm rings.
Plaque d'Adaptation Déportée pour colliers BH 11mm - Plaque d'adaptation décalée: Plaque d'adaptation décalée available in multiple sizes (Taille option). Designed for offset optics setups. The size option lets you fine-tune the offset to your exact rail and scope geometry, which is useful if 50mm is too much or too little.
Plaque d'adaptation décalée
Who should buy an offset adapter plate
Best for
- Shooters who need to shift a scope forward on a BH 11mm rail without buying new rings
- Air rifle and rimfire users who want precise eye relief adjustment
Not for
- Rifles with Weaver/Picatinny rails (use a different adapter type)
- Shooters who already have adequate eye relief with standard ring placement
