Diversify Guide Rod is made by Stainless Steel material with CNC machined. It enhances durability and reduces friction by hard-anodized finishing. The package includes an enhanced recoil spring and a pack of aluminum buffers that comprehensively optimise the cycling speed and stroke. There are 2 different tension zones (140% / 120%) which improve the recoil control and make easier handling on blowback cycling. 3 blocks of buffers can let the user to select the perfect setting on the stroke.