SKB Shotguns
GAS Ring Diagrams

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These ring diagrams are for models XL300, XL900, 1300, 1900 and 3000. We stock most parts for the gas-automatics, and can ship them same day.

12 Gauge

mag tube Magazine Tube
1 -104350 - Steel
2 -104330 - Plastic
1 -104340 - Steel 
1 -104320 - Steel
1 -104360 - Steel Spring

Magazine Tube

Item #  Description Price    Qty
104350  Cushion Ring Follower $6.00
104330  Inner Cushion Ring (2 required) $6.00
104340  Over Cushion Ring $8.00
104320  Cushion Ring Retainer $8.00
104360  Cushion Ring Spring $3.00


barrel Barrel Chamber Side
1 - 101520 - Aluminum
1 - 101530 - Steel Spring
1 - 101510 - Brass
Barrel Muzzle Side
1 - 101540 - Plastic
1 - 101550 - Aluminum
1 - 101570 - Rubber

Barrel Chamber Side

Item #  Description Price    Qty
101520  Piston Ring Retainer $10.00
101530  Piston Ring Spring $4.00
101510  Piston Ring $10.00

Barrel Muzzle Side

Item #  Description Price    Qty
101540  Barrel Ring Packing $6.00
101550  Barrel Ring Bushing $12.00
101570  Bushing Packing $3.00


sleeve Action Bar Sleeve
1 - 103200 - Plastic
1 - 103300 - Aluminum

Action Bar Sleeve

Item #  Description Price    Qty
103200  Cylinder Ring $6.00
103300  Cylinder Ring Retainer $10.00


20 Gauge

mag tube Magazine Tube
1 - 203030 - Steel
1 - 204350 - Steel
2 - 204330 - Plastic
1 - 204340 - Steel
1 - 204320 - Steel
1 - 204360 - Steel Spring

Magazine Tube

Item #  Description Price    Qty
203030  Barrel Supporting Block Retaining Pin Spring $3.00
204350  Cushion Ring Follower $6.00
204330  Inner Cushion Ring (2 required) $6.00
204340  Over Cushion Ring $8.00
204320  Cushion Ring Retainer $8.00
204360  Cushion Ring Spring $2.50


barrel Barrel Chamber Side
1 - 201520 - Aluminum
1 - 201510 - Brass

Barrel Muzzle Side
1 - 201540 - Plastic
1 - 201550 - Aluminum

Barrel Chamber Side

Item #  Description Price    Qty
201520  Piston Ring Retainer $10.00
201510  Piston Ring $10.00

Barrel Muzzle Side

Item #  Description Price    Qty
201540  Barrel Ring Packing $6.00
201550  Barrel Ring Bushing $12.00


sleeve Action Bar Sleeve
1 - 203200 - Plastic
1 - 203300 - Aluminum

Action Bar Sleeve

Item #  Description Price    Qty
203200  Cylinder Ring $6.00
203300  Cylinder Ring Retainer $10.00