Detonic CombatMaster Complete Specs and Full Gun Specifications

The second reason is the Detonics captive tri-coil spring system, which uses three rather than the more common two recoil springs on a full-length guide rod. The latter (two springs) should be changed every 800 to 1,000 rounds. They wear out quickly because they're doing the same work as a full-size single recoil spring but in a much shorter space. According to both Jerry Ahern, Detonics USA president, and Pete Dunn, the company's master gunsmith, the Detonics system is good for 5,000 rounds.