Lapping Aluminum Scope Rings

There s no sure way to know when you re done other than looking and need to clean the interior of the rings for inspection more than once is a possibility. You can also improve the same area by having larger diameter scope bodies or thicker scope bodies. Originally posted by mathman hate and phobic are terms used to put a negative spin on distaste or dislike expressed in a contrary opinion.

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Place the scope lapping tool onto the rings and screw down the two top scope rings gently.

Lapping aluminum scope rings.

For the full length version of this and other midwayusa videos visit the midwayusa video library. But had i put the scope in those rings without reaming and lapping i would have probably ruined the scope. The rings are tightened to the point where the bar can move but with slight resistance and the bar is worked back and forth. Aluminum is anodized and lapping them makes them softer by removing the hard anodized outer layer.

Lapping increases the surface contact between the scope tube and ring and aligns the scope rings. Specifically applied to scope rings the user would assemble the base and rings with a steel lapping bar. Http bit ly mrft9n lapping the rings on a rifle is a quic. Work the lap in zigzags through the rings and in figure 8s or ovals as the surfaces smooth up and the lap moves more easily.

A lapping compound which is basically an abrasive liquid or paste is applied to the bar. The purpose for lapping the rings is to reduce any side loading flex on the scope. That s most likely the finish on the scope rings and a bit of metal coming from the interior of the rings during the lapping process. Screw the ring tops on but don t tighten the screws too snug.

Slowly move the scope lapping tool back and forward along with a gentle twisting action. After 15 minutes of gentle action remove the two top scope rings and check. When lapping separate scope rings i set them as far apart on the mounting rail as possible in order to provide the maximum lapping rod movement covered later. Uncoated steel especially stainless is a different matter.

The base and rings are assembled on a steel lapping bar the abrasive compound silicon carbide aluminum oxide or alumina and boron carbide being commonly used is coated on the bar. So how is it done. Slowly screw down the top scope rings to provide extra pressure on the scope lapping tool. Brownells scope ring alignment lap is available in 1 inch and 30mm versions shown and includes lapping compound.

So how is it done.