Bisley SP4 Side-Mounted Spirit Level for Scope Mounts

• Eliminates rifle cant for improved accuracy – level is visible in peripheral vision without moving eye from scope
• Fits all Sportsmatch dovetail mounts with M5 (larger) dovetail clamp screws
• Simple fit – replace standard M5 side screw with shorter M5 screw supplied; no tools required beyond finger-tight
• Weighs only 8g – no discernible effect on rifle balance
• Black anodised aluminium housing for durability
• Kit includes spirit level unit and shorter M5 replacement clamp screw
• Made in the UK by Sportsmatch; sold under the Bisley label

The Bisley SP4 is a side-mounted spirit level kit made in the UK by Sportsmatch, designed to eliminate rifle cant and improve accuracy at longer ranges. It fits all Sportsmatch dovetail scope mounts that use M5 dovetail clamp screws – the larger side screws on the mount base. Installation is straightforward: the standard M5 clamp screw is replaced with a shorter M5 screw supplied in the kit, and the spirit level unit threads in to the same hole. The bubble is positioned to remain visible in peripheral vision while the eye stays at the scope eyepiece, so the rifle can be levelled without breaking the shooting position. At only 8g the SP4 adds no meaningful weight and will not affect balance. The black anodised aluminium housing is compact and robust. A practical addition for any shooter using Sportsmatch mounts who wants a quick, reliable cant reference for field shooting or zeroing.

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