Polished aluminium silencer adaptor with muzzle brake..
Adaptors slip on 40mm and are secured via x2 M4 grub screws.
10mm (with a taper to 12mm) compatible with Air Arms S400/410
11.05mm compatible with Crosman 2240/2250
14mm compatible with early SMK XS78
14.5mm Compatible with SMK XS501
15mm Compatible with SMK QB78/TH78D and AIR ARMS S200 MK3
Adaptors will also fit other makes and models not listed.