Cryogenically processed, stress relieved and hardened steel rod offers no-flex cycling that reduces spring bind, helps ensure reliable feeding and ejection. Fits the small I.D., flat wire, factory and aftermarket springs with no modifications or alterations.

This is for Gen 1-3 Models only unless used with item 100-006-593 for Gen 4 Models.

SPECS: 4140 steel, black, matte finish. Hardened to Rc 32-24. Glock®17 fits; 17, 17L, 22, 24, 31, 34, 35.