silence means optimal efficiency.. so look for a gun with the following:
regulator
sling shot or other anti bounce hammer
longer barrel
.22
that will minimise the noise at source, then just select or build the best mod / shroud
however the point about permission on the allotment is a pretty fundamental one.. id be amazed if the council gave permission for allotment users to discharge airguns on those tiny plots..
Always looking for any cheap, interesting, knackered "project" guns. But not lathes. I have too many lathes. Thanks, JB.