Single shot loader for the Air Arms s410, s510, Ultimate sporter etc by Rowan engineering.

Item itself is in perfect condtion however packaging is a little tatty.
Caliber .22

The loader clips on to the rifle using the same method as as the
Air Arms magazines. Cocking the rifle pops open the loader for
the next pellet. The loader will fit all Air Arms multi-shot
rifles that use the standard Air Arms Magazine (except Galahad)
Accepts .22 pellets up to 8.5mm long.