Its a clever design that's for sure. This said some folk really overestimate the need for a spring compressor. The overwhelming majority of legal limit guns in the UK do not need one. In fact I have yet to come across a rifle where I have needed one. This said it would be nice to own just have in case
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Be interesting to hear from other members who have had sub 12 ft/lb rifles where the had to use a spring compressor
Kindest regards
Barrel