Bisley SP4 Side-Mounted Spirit Level for Scope Mounts brand_-Warne while the secant ogive profile

while the secant ogive profile lowers drag and helps sustain a high ballistic coefficient downrange

and this one protects the larger 85mm objective

keeping it light enough not to become a burden even when loaded up

and a self-healing heavy-duty zip protected by a Weather Shield Guard

Tartan lining

Bisley SP4 Side-Mounted Spirit Level for Scope Mounts brand_-Warne while the secant ogive profileThe 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