Nordic Tube Spring
Now available in standard or heavy duty models. Nordic Mag Tube Replacement Spring - not a bad idea to replace the mag tube spring every 12 months or so. I always keep a spare in my major match bag in case of emergencies. Springs are one size fits all, so you cut to length for your specific tube. All our springs are for the 12 gauge extensions.
For the standard spring, Nordic recommends a free spring length of 10" to 16" longer than the entire tube assembly for proper function. Price is $12.93.
The heavy duty spring requires less free space than the standard strength spring. Recommended free spring length for this spring is 12". For use with any extension bringing magazine capacity to 12 or more, as well as any +8 or +9 extension. Price is $13.93.