The Colt 1911 Commander 9mm Dual Recoil Springs feature an advanced dual-spring system for a softer recoil and increased reliability.
These springs are designed for use specifically with Colt 1911 Commander Model pistols chambered in 9mm, and they extend the service life of the recoil spring up to 15,000 rounds.
The dual recoil springs must be used with the Colt Dual Spring Recoil System's dedicated guide rod and recoil spring plug, which are sold separately.