Rings - 4 Bolt

Porter Machine Works Verified independent store

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Engineered and made in Australia by Porter Machine Works. CNC machined from 7075-T651 Aluminium plate and anodised in Sydney. Our rings are designed to mount to MIL STD 1913 picati nny rail. Side clamp uses a T20 Torx driver at 40 in-lb (4.5Nm) Top caps use a T20 Torx driver between 17-25 in-lb (1.9 - 2.8Nm) Weights: ⌀30mm-23 ~ 128 grams ⌀30mm-28 ~ 151 grams ⌀30mm-33 ~ 172 grams ⌀30mm-38 ~ 193 grams ⌀34mm-26 ~ 140 grams ⌀34mm-28 ~ 149 grams ⌀34mm-33 ~ 169 grams ⌀34mm-38 ~ 191 grams ⌀35mm-28 ~ 147 grams ⌀35mm-33 ~ 169 grams ⌀35mm-38 ~ 190 grams Show more