Flatline Ops
Flatline Ops
Flatline Ops
Flatline Ops
Flatline Ops
Flatline Ops

Flatline Ops

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Acculevel™Level whatever field you're playing on. 

This series installs quickly and effortlessly with easy micro-level adjustments after installation. A rigid, ultra-rugged level that sits higher and wider for more visibility and fast referencing. The ACCU/LEVEL™ system aids in the correction of "cant error," giving you dead-on true vertical hold to make sure you are on target.

Solid, Durable Construction
Each level is machined from advanced 6061-T6 aircraft aluminum and black hard anodised to protect it from the extremes of the outdoors. The level also features a dual-position detent locator to make sure you are locked into place before taking that critical shot. The level is also built to fit right- or left-handed shooters.

  • Sniper    30mm Acculevel (flip out model)
  • Covert    34mm Acculevel (flip out model)
  • Patriot    30mm Acculevel (standard model)
  • Patriot    34mm Acculevel (standard model)

  • High Visibility
  • High-visibility fluorescent fluid level is easy to visualise and locate before each shot. You also have the ability to do +/- micro adjustments to the level after installation with the fine adjustment screws.
  • Tech Specs
  • Fit Size: 30 & 34mm
  • Width: 0.5"
  • Material: 6061-T6 Aircraft Aluminum
  • Finish: Black Hard Anodized
  • Hardware: Stainless Steel
  • Level: High Visibility Fluorescent fluid

Watch the Video...

*Install without removing scope (in most cases).  *Ships with Instructions and all installation tools

TRUE BORE™ ADI/ACI SET-UP TOOL™Make Angle Indicator Installation a Snap.


Attaching Angle Degree Indicators or Cosine Degree Indicators to your firearm is easy, but calibrating them to read correctly is more challenging.

Attach the Flatline Ops TRUE BORE™ ADI/ACI Set-Up Tool™ to the tip of your barrel for quick and easy calibrating of your Indicators. Leveling the barrel becomes as easy as centering the bubble between the lines. Fits all barrels, any size.

Speed and ease is what you get with this ultra-lightweight, space-age polymer level.

Black, high-strength polymer construction
Instructions included


The Flatline Ops Military Spec Angle Cosine Indicator® (ACI®) mounts to either our STRONG ARM™ or SLOT LOCK™ adapter and takes the guesswork out of uphill and downhill precision, long-range shooting. An angle cosine indicator is a simple tool for hunters to use in mountainous terrain to obtain their distance to target, corrected for gravity.
Solid, Durable Construction

Based on the principles of our ADI, this version of the ACI is guaranteed watertight and is manufactured per US Military Directives. The ACI is a vault-solid, precision instrument, silent (per military specs), and constructed from aircraft grade aluminium, which is anodised in a flat black colour. Cosine numbers are laser-engraved onto the body in five degree increments, and the lens is shatterproof, shockproof, and resistant to chemicals such as acetone and cleaning solvents. Completely mechanical, there are no batteries or electronics to fail.

Strong Arm™ your target.

Want to make your Flatline Ops ACCU/LEVEL™ even more precise? Just add the STRONG ARM™ mounting system. It mounts quickly and easily onto any ACCU/LEVEL™ with accessory dove tail, and positions your ADI/ACI for an unobstructed view of uphill and downhill trajectory angles.

Solid, Durable Construction

Made of 6061-T6 aircraft aluminum, you will know why its called the STRONG ARM™. Each STRONG ARM™ is hard anodized with a military spec finish and boasts all stainless steel hardware.

STRONG ARM™ is interchangeable with any size articulating ACCU/LEVEL™. If you have multiple firearms with different ACCU/LEVEL™ sizes, you can move one STRONG ARM™ and ADI between them all.

Installation tool included

Fits all articulating ACCU/LEVEL™