Technical Details / Usage Tips

• Brand: MEC / Centra.
• Type: Rear sight riser / adjustment block.
• Base Height: 10 mm.
• Max Height: 22 mm.
• Vertical Adjustment Steps: 4 mm increments.
• Horizontal Offset: Up to 4 mm.
• Dovetail Shift: Up to 25 mm.

The MEC Centra Block Club is a highly practical and precise accessory designed for rifle shooters who need extended adjustment options for their rear sight position. It enables both vertical and horizontal correction of the sightline, making it ideal for shooters with specific ergonomic requirements or unconventional shooting positions.
With a base height of 10 mm, the block allows vertical elevation in 4 mm increments, reaching a maximum height of 22 mm. This modular height system ensures repeatable and stable adjustments without compromising rigidity.

In addition to vertical elevation, the block offers horizontal offset up to 4 mm, helping shooters fine-tune left or right alignment for optimal eye–sight relationship. The rear-sight dovetail can also be shifted by up to 25 mm, giving exceptional flexibility in positioning the rear sight exactly where the shooter needs it.

Manufactured by MEC / Centra, a trusted name in competitive shooting equipment, the Block Club is engineered for precision, durability, and ISSF-compliant use.