Magazine Extension for Winchester SX3 and SX4

one piece solid aluminum shotgun extension with extra power spring.
Just replace the spring and tube to extend your magazine capacity.

For best results we suggest to order the low drag follower and the barrel clamp.

Manufacturer: Tonisystems.
Cut the spring overal length of magtube + 10 inch

Tube extension +6 rounds for Winchester SX3-SX4 ga.12

from Tonisystems