Description
The Nordic Components 12GA 45" HD Extension Tube Spring (MXT-SP-045-50) has extra length to allow fitting to the magazine, heavy-duty strength, and recommended for applications where magazine capacity is 13 or more.
Note: Due to magazine spring tension issues, it is not recommend using an HD spring in the following shotguns.
- Mossberg 930 (all models)
- Browning Gold
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