This is the MagFox replacement magazine spring for the S&W 15-22 25 round magazine and CMMG Gen 2 AR-15 .22 magazine.
- Increased power for smoother feeding
- Carbon steel spring
- Heat treated
- Made in the UK
Allows the CMMG Gen 2 AR-15 .22 magazine to reliably operate last round bolt hold open catches, such as the ARcatch22 and those found on the Kriss DMK rifles.
Fresh springs help maintaining optimal pressure for reliable competition feeding if your magazines have seen some use.
Can be trimmed down for use in high capacity extensions for the GSG 1911.