2 x underside barrel retaining grub screws for the following model BSA air rifles:
– R10 all models inc. MK1, MK2, SE, TH and RTen
– Scorpion, Scorpion SE and Scorpion TS
– Ultra, Ultra SE, Ultramax and Ultra XL
– Goldstar SE
– Buccaneer & SE
– Defiant
– Brigadier