Heard about Boelube for years. Finally had a chance to try it on several projects. It definitely works well and better than anything else I have ever tried. Would recommend.
Got it for AR assembly and it is the cheapest way to get it.
RAM Mounts
(Backordered) Normally Available within 10–12 Days.
SKU:RAM-B-108B-STRAP40U
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We match RAM direct prices, including quantity discounts.
The RAM-B-108B-STRAP40U accommodates rails from 2" to a maximum of 3" in diameter. To mount the RAM-B-108B-STRAP40U base, place the saddle shaped plate on the rail then wrap the metal clamp strap around the rail and plate. Tighten the screw knob on the metal strap with a screw driver until the strap has a firm hold on the rail. The RAM-B-108B-STRAP40U is an alternative mounting base for aircraft such as the Bonanza or Beech with a “throw over yoke”.
Clamp Dimensions: 2" to 3"
Material:
Powder Coated Marine Grade Aluminum
Ball Size:
1" Rubber Ball "B" Size
Included in Kit:
(1) QTY metal strap
(1) QTY 5.5" rubber strip that supports the metal straps to avoiding scratching or marking of the rail Note:
The "U" in the part number reflects product packaged in poly bag.

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Heard about Boelube for years. Finally had a chance to try it on several projects. It definitely works well and better than anything else I have ever tried. Would recommend.
Got it for AR assembly and it is the cheapest way to get it.