The kit is a full seal kit for all the following rifles:
S300, S310, S400, S410, S500, S510, Superlite, MPR, TDR models

You will not need all the provided seals for some older models,

and so you just use the ones you need

i.e. There are the breach seals for both the .177 and .22 calibre. 

(Just use the seals that you require)

Seal kits are for both .177 & .22, Superlite, Carbine and full-length rifles

Package Contains x 16 O-Rings:

1 x S327: Filling valve O-Ring

1 x RN219/9: Pressure gauge O-Ring

2 x RN234: Reservoir cylinder O-Ring

2 x S427: Transfer Port & Pressure gauge mount (bottom)

2 x S474: T-Bar Filling valve O-Ring

1 x S484: Barrel support clamp & Male connector O-Ring

1 x S536: Pressure gauge mount (top)

1 x S538: Barrel .22

1 x FP121: Barrel .177

1 x S556: Magazine O-Ring

1 x S650: Loading bolt shaft buffer O-Ring

1 x S465: Pressure gauge Dowty washer