A spare set of 7" (50 coil) springs for servicing common short length Black Dog magazines.
Useful if your magazines are seeing a lot of use and the spring pressure is starting to drop, which can result in misfeeds.
Fits the following models:
- Black Dog 10 & 15 round Sonic X magazine
- Black Dog 10 & 15 round X form magazine
- Sig Sauer branded SIG 522 10 round magazine
