Now you can tune mags yourself, perfectly!
Dave Dawson has designed a tooling package to tune STI Magazines. Dave has long been recognized as The Expert on STI mags. Now you can tune and maintain your own magazines the same way Dave does. Kit includes Feed Lip Forming Tool, Feed Lip Spreading Pliers, Diamond Feed Lip De-Burring File, the spring compression tool along with an instructional DVD that demonstrates the proper process to tuning magazines. Dave’s own Top-Secret measurements to super-tune your high-capacity magazine will be revealed for the first time on the DVD. Brass hammer and dial calipers are required but not included.