Acme 504 Fox & Widgeon Predator Warbler Call rucksacks while the short YKK zip

while the short YKK zip at centre front lets you vent quickly without removing the garment

repeatable readings

The substantial size is well-suited to roe shoulder mounts and the straightforward profile keeps the focus on the trophy rather than the mount itself

taking the wobble out of an offhand hold and helping you settle the crosshairs before squeezing off

Acme 504 Fox & Widgeon Predator Warbler Call rucksacks while the short YKK zipThe Acme 504 is a compact metal warbler call that does two jobs in the field. Lightly blowing or sucking the whistle produces the thin, broken notes of a small bird or an injured animal, the sound a fox associates with an easy meal. Worked carefully from cover and downwind, that distress note can draw a curious fox right up to the gun, which makes the 504 a genuinely useful piece of kit for anyone controlling foxes at night or lamping over open