The Timney Alpha Competition Trigger delivers precision performance for large frame Glock pistols with its anodized finish and competition-grade design engineered for Gen 3 & Gen 4 models.Timney Alpha Competition TriggerFits large frame Glock Gen 3 & Gen 4 pistolsCompatible with models 20 21 29 30 40 and 41Anodized finish for durability and corrosion resistanceCompetition-grade trigger mechanismIdeal for competitive shooters and enthusiasts seeking enhanced trigger performance and reliability in their large frame Glock pistols.