VO M4 Screw-in Anti Cantilever Device – Black

Bubble Level with M4 Thread for Scope Rings
Looking to eliminate rifle cant while shooting? Want to improve your accuracy at medium and long distances? Need a useful aid for your airsoft sniper rifle so your BBs fly straighter? This bubble level from Vector Optics is the right choice. It is designed for scope rings and one-piece mounts equipped with M4 threaded holes. With this accessory, you can easily enhance your shooting precision by removing aiming errors caused by rifle tilt. Installation is quick and simple — just screw the level into the second side of the clamping screw port on the RIS rail interface of the ring or mount. With a weight of only 7 g, it adds virtually no bulk to your setup. Made from 6063-T6 aluminum alloy, it offers durability and long service life, making it an ideal upgrade for anyone who wants a practical and reliable accessory to boost shooting performance.

Example of a properly centered bubble (middle of the black line)

Key Features

Improved accuracyHelps monitor rifle cant and enhances precision.
CompatibilityDesigned for mounts and rings with M4 threads.
Easy installationInstalls by threading into the opposite side of the clamp screw opening on a RIS interface.
Durable materialConstructed from high-quality 6063-T6 aluminum alloy.
LightweightWeighs only 7 g, adding no unnecessary load.

Technical Specifications

Length: 26.62 mm
Material: 6063-T6 aluminum alloy
Weight: 7 g
Thread: M4
Finish: Matte black

Package Contents

Bubble level with M4 thread