Over the last couple of years, there has been a slow resurgence in the popularity of 10mm. Earlier this year Glock released the G20 Gen 5 in 10mm. While SIG SAUER released the SIG X-Ten with great success. With that increase in popularity, Federal Ammunition has jumped into the fray. Federal Ammunition is proud to announce the expansion of its Train + Protect lineup with the Train + Protect 10mm.