Warne Smith & Wesson M&P 9/40 Magazine Extension +3/9mm +2/.40 Gray 3309-3RD. Warne machined these Magazine Extensions from 6061 T6 aluminum to add extra durability. The Warne Smith & Wesson M&P 9/40 Magazine Extension features an ergonomic shape...
Warne Smith & Wesson M&P 9/40 Magazine Extension +3/9mm +2/.40 Gray 3309-3RD. Warne machined these Magazine Extensions from 6061 T6 aluminum to add extra durability. The Warne Smith & Wesson M&P 9/40 Magazine Extension features an ergonomic shape...