Production started in March 2020 and breaking point was set to May, hovever there could be stocked liners that were not superior sold after May.

All superior liners are marked with a sticker so best way to know for sure is to inspect the liner.


Superior

Standard Liner used on all production models and barrel kits.

Created to shoot standard weight pellets and Hybrid Slugs. 

Also maximizes the accuracy of the FX Hybrid Slug.

Lighter weight slugs from some manufacturers may also shoot well.

Superior Heavy

Only sold as a separate accessory (not as barrel kit).

Has a different twist rate better suited for heavier pellets and heavier slugs 

(as opposed to lighter Hybrid Slugs and some manufacturer’s lightweight slugs).

 

List of twist rates for the current offering of FX Superior STX barrel liners. 2020 October

Item no

Name

Length

Description

Caliber

Twist-rate

20362

Pellet liner A

300mm

Factory Standard

0.177

1:18

20187

Pellet liner A

380mm

Factory Standard

0.177

1:18

19964

Pellet liner A

500mm

Factory Standard 

0.177

1:18

20243

Superior

300mm

Factory Standard

0.22

1:24

20188

Superior

380mm

Factory Standard

0.22

1:24

19965

Superior 

500mm

Factory Standard

0.22

1:24

20011

Superior 

600mm

Factory Standard 

0.22

1:24

20204

Superior 

700mm

Factory Standard

0.22

1:24

20379

Superior Heavy

380mm

Accessory

0.22

1:16

20070

Superior Heavy

500mm

Accessory

0.22

1:16

20073

Superior Heavy

600mm

Accessory

0.22

1:16

20206

Superior Heavy

700mm

Accessory

0.22

1:16

20189

 Superior

380mm

Factory Standard

0.25

1:24

19976

Superior

500mm

Factory Standard

0.25

1:24

19966

Superior

600mm

Factory Standard

0.25

1:24

19977

Superior

700mm

Factory Standard

0.25

1:24

20072

Superior Heavy

500mm

Accessory

0.25

1:18

20071

Superior Heavy

600mm

Accessory

0.25

1:18

20069

Superior Heavy

700mm

Accessory

0.25

1:18

20190

Superior

395mm

Factory Standard

0.30

1:24

20369

Superior

500mm

Factory Standard

0.30

1:37

19967

Superior

600mm

Factory Standard

0.30

1:37

19978

Superior

700mm

Factory Standard

0.30

1:37

20370

Superior Heavy

500mm

Accessory

0.30

1:22

20233

Superior Heavy

600mm

Accessory

0.30

1:22

20234

Superior Heavy

700mm

Accessory

0.30

1:22

20286

Superior

800mm

Factory Standard

0.35

1:25


List of twist rates for the current offering of FX Superior STX barrel liners. 2021 January

Item no

Name

Length

Description

Caliber

Twist-rate

20362

Superior

300mm

Factory Standard

0.177

1:18

20187

Superior

380mm

Factory Standard

0.177

1:18

19964

Superior

500mm

Factory Standard 

0.177

1:18

20430

Superior

598mm

Factory Standard

0.177

1:18

20243

Superior

300mm

Factory Standard

0.22

1:24

20188

Superior

380mm

Factory Standard

0.22

1:24

19965

Superior 

500mm

Factory Standard

0.22

1:24

20011

Superior 

600mm

Factory Standard 

0.22

1:24

20204

Superior 

700mm

Factory Standard

0.22

1:24

20379

Superior Heavy

380mm

Accessory

0.22

1:16

20070

Superior Heavy

500mm

Accessory

0.22

1:16

20073

Superior Heavy

600mm

Accessory

0.22

1:16

20206

Superior Heavy

700mm

Accessory

0.22

1:16

20189

 Superior

380mm

Factory Standard

0.25

1:24

19976

Superior

500mm

Factory Standard

0.25

1:24

19966

Superior

600mm

Factory Standard

0.25

1:24

19977

Superior

700mm

Factory Standard

0.25

1:24

20072

Superior Heavy

500mm

Accessory

0.25

1:18

20071

Superior Heavy

600mm

Accessory

0.25

1:18

20069

Superior Heavy

700mm

Accessory

0.25

1:18

20190

Superior

395mm

Factory Standard

0.30

1:22

20369

Superior

500mm

Factory Standard

0.30

1:22

19967

Superior

600mm

Factory Standard

0.30

1:22

19978

Superior

700mm

Factory Standard

0.30

1:22

20370

Superior Heavy

500mm

Accessory

0.30

1:18

20233

Superior Heavy

600mm

Accessory

0.30

1:18

20234

Superior Heavy

700mm

Accessory

0.30

1:18

20286

Superior

800mm

Factory Standard

0.35

1:25