Porter Machine Works Unimount 4 bolt

Due to a large range of ring options, we are currently offering drop shipping directly from Porter Machine Works to your shipping address. We will have our own stock on hand shortly.

Most common rings are in stock, but some items can sell out and will have a lead time of 3-5 weeks before they can be produced then shipped. Please send us an email so we can check stock of your item before placing an order online.

Engineered and made in Australia by Porter Machine Works. CNC machined from 7075-T651 Aluminium plate and anodised in Sydney.

These rings are designed to mount to MIL STD 1913 picatinny 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:

⌀30-30-0 & ⌀30-30-7 ~ 180 grams

⌀30-34-0 & ⌀30-34-7 ~ 200 grams

⌀30-38-0 & ⌀30-38-7 ~ 215 grams

⌀34-30-0 & ⌀34-30-7 ~ 180 grams

⌀34-34-0 & ⌀34-34-7 ~ 200 grams

⌀34-38-0 & ⌀34-38-7 ~ 215 grams