Wolff Precision magazine spring for 2011 9mm cal.

Wolff Precision magazine spring for 2011 9mm cal.

Wolff Precision extra power, extra coil magazine spring (13 coils total) for double-stack hi-capacity magazines of Strayer-Tripp (STI), Strayer-Voigt (SVI) and McCormick frames. The manufacturer specifies it for .38 Super hi-capacity magazines; it is suitable for repairing magazines used with extended or custom magwells and can also be fitted for factory capacity.

• Extra power, 13 coils
• Double-stack profile: not suitable for single-stack magazines
• For STI, SVI, McCormick hi-capacity magazines