The Area 419 Magazine Extender is a universal magazine extender for any short action magazine. these will allow you to turn a standard 10-round magazine into a 13 to 15 round magazine, depending on the cartridge.
Expected Capacity Increase:
ARC 10-Rounders: +4 or +5 depending on cartridge
AICS & Accurate 5/10 Rd: +4 or +5 depending on cartridge
Accurate WSM 3 or 7 Rd: +3