How do I tune my rifle using a MANAEL Barrel Tuner?

Important Precautions:

  • Safety First: Before installation, ensure your firearm is clear of all ammunition and verified as unloaded. Confirm that your firearm is in safe working condition.
  • Legal Compliance: You are responsible for confirming and complying with your state or territory firearms laws and regulations. Consult your local authorities before any modification.

Note: Instructions for installing the MANAEL Barrel Tuner can be found here

Preparing for the Tuning Process

  1. Read Instructions Twice: Familiarize yourself with the instructions by reading them thoroughly twice
  2. Prepare your targets: The MANAEL Barrel Tuner requires live-fire at a target where you can easily see your groups, such as paper targets, at a known distance.
    • Testing can be done at 100m or beyond, as long as you can reliably shoot on paper at that distance.
    • Inspect the target regularly, and be patient—it may take several rounds of testing at different settings to find the optimal position for your rifle and ammunition.
    • Use a consistent batch of ammunition/loads for the tuning/testing process.
    • Group sizes may change in “waves.” Be patient and work through the wave, going “past” the perfect tuning spot and back again. This may take multiple full rotations of the tuner body.

Tuning Guide for MANAEL Barrel Tuner

  1. Mark your home position:
    • This step is optional, but enables rapid, repeatable alignment. It provides a clean alignment mark for the tuner.
    • Place two strips of tape on your barrel lengthways, inline with the bullet travel, about 0.5mm to 1mm apart.
    • Paint between the tape with nail polish or a paint marker, wait to dry, then peel the tape off.
  2. Set Tuner in home position
    • Place MANAEL Barrel Tuner in the starting position with number “0” at the top center point (12 o’clock position) or inline with the painted mark.

  3. Identify optimum Barrel Tuner position:
    • When safe to do so, fire 2 or 3 rounds at an identified target and note the group size.
    • Rotate the tuner by one number (equivalent to 2 marked positions) and fire another two rounds at a new target, noting the group size.
    • Repeat this process, monitoring group sizes.
    • As you shoot at each tuner number/position, group sizes will start to change, eventually shrinking. This may take one or two complete tuner revolutions.
    • With each turn, the group size will continue to close up until a certain point. Then, groups may open up again, indicating you’ve moved past the optimum point.
    • Turn the tuner back to the previous position (where group sizes were tightest)—this is your optimum tuned position. Take note of the marked position on the tuner using the timing marks on the Tuner body.

  4. Set & Lock Tuner at Optimum Position
    • Once your MANAEL Barre Tuner is turned to the position which gives the tightest group sizes, it needs to be secured in position.
    • Lock the tuner into position by tightening the knurled ring lock nut. Do not turn the Tuner body. Turn the lock nut until it is pinch-tight to prevent it from loosening.

  1. Before removing the MANAEL Barrel Tuner
    • If you plan to remove the MANAEL Barrel Tuner, make a note of the numbered position before removal.
    • When reinstalling, start the tuning process from the previously numbered position to expedite finding that sweet spot.

Note: You will need to repeat the tuning process if you change ammunition or loads, or if the MANAEL Barrel Tuner is placed on a different rifle or barrel.

How do I install a MANAEL Bloop Tuner (Barrel Tuner & Bloop Tube)?

Important Precautions:

  • Safety First: Before installation, ensure your firearm is clear of all ammunition and verified as unloaded. Confirm that your firearm is in safe working condition.
  • Legal Compliance: You are responsible for confirming and complying with your state or territory firearms laws and regulations. Consult your local authorities before any modification.

Installation Guide for MANAEL Bloop Tube & Barrel Tuner (Bloop Tuner)

Pre-Installation:

  • Read Instructions Twice: Familiarize yourself with the instructions by reading them thoroughly twice
  • Prepare all parts: You will need a MANAEL Bloop Tube and a compatible size MANAEL Barrel Tuner.

Note: Photos in this guide may display different models of the MANAEL Ultralite Bloop Tuner, including the Ultralite model. The installation process remains the same for all models.

Installing the MANAEL Bloop Tuner (Bloop Tube & Barrel Tuner)

  1. Disassemble the MANAEL Barrel Tuner
  • Unscrew the MANAEL Barrel Tuner’s internal thread cup, this will free Tuner components (tuner body, lock ring, and o-ring).
  • Take note of where the o-ring sits against the Tuner face
  • Set aside the o-ring, knurled lock ring and tuner body (which is the large weighted piece with the MANAEL logo and timing identifier marks).
  • Safely store the internal thread cup (and thread adaptor if required) for future use. These are not needed when using the MANAEL Tuner on a MANAEL Bloop Tube.
  • Some models of MANAEL Bloop Tube have a thread protector. This will need to be removed and set aside.

2. Attach MANAEL Barrel Tuner Weighted Body to MANAEL Bloop Tube

  • Slide the MANAEL Barrel Tuner Weighted Body onto the smaller end of the MANAEL Bloop Tube (the end without external threads).
  • Orient the flat edge towards the external thread (front end) of the Bloop Tube and the tapered edge towards the smaller part of the tube (back end).
  • Push the Tuner Weighted Body tuner to the front of the Bloop Tube, screwing it onto the thread, leaving about 10mm of threads exposed.

3. Place O-ring and Locknut

  • Put the o-ring over the MANAEL Bloop Tube external thread. Position the o-ring against the Tuner’s face (same position it was in when disassembling the Tuner).
  • Screw the Tuner Lockring onto the exposed thread of the Bloop Tube.

4. Install to Your Gun

  • Ensure the end with Tuner is furthest from the rifle muzzle.
  • Screw the tube end onto the rifle muzzle thread using the tube’s internal thread.

5. Final Checks

  • Perform necessary safety checks.
  • Your MANAEL Bloop Tuner (Bloop Tube + Barrel Tuner) is now installed & ready for the tuning process, allowing you to optimize your rifle’s performance effortlessly.

Continue reading to learn more about the Tuning Process for the MANAEL Barrel Tuner systems.

How to tune your rifle & tighten groups with a MANAEL Barrel Tuner

The MANAEL Barrel Tuner helps to tighten groups and create better consistency in your ammunition.

This is done through managing barrel harmonics and vibrations.

The MANAEL Barrel Tuner takes care of this for you – all you need to do is spend a few minutes setting it up correctly.


How do I tune my rifle using the MANAEL Barrel Tuner?

Before you begin:

The MANAEL Barrel Tuner requires live-fire at a target which you can easily see your groups on, such as a paper targets. The target needs to be at a known distance.
Testing can be done at 100m or beyond, providing you can reliably and confidently shoot on paper at that distance.
You will need to inspect the target regularly to monitor results. It may take several rounds of testing at different settings to find the position that works best with your rifle and ammunition.
Its best to use consistent ammunition/loads for the tuning/testing process.
Group sizes will often change in “waves” – growing larger and smaller, then larger and smaller again. Be patient and work through the wave. You may need to go “past” the perfect tuning spot and see it open up again to be sure it is the tightest group position.

Instructions testing the MANAEL Barrel Tuner / tuning your rifle

1. Set the MANAEL Barrel Tuner in the starting position.
Rotate it so number “0” is at the top Centre point (12 o’clock position).

2. Fire two rounds at an identified target and note the group size.

3. Rotate the tuner by one number (this is the equivalent of 2 marked positions; a number and a mid-way line).

4. Fire another two rounds at a new target and note the group size.

5. Repeat this process and monitor the group sizes.
As you are shooting at each tuner number/position, group sizes will start to change. There may be variation, eventually the group size will start to shrink.
This may take one or two complete revolutions of the tuner.

6. With each turn, the group size will continue to close up until a certain point.
Then, groups may open up again. This means you have found the optimum point and moved past it. 

7. Turn the tuner back to the previous position (where group sizes were at their tightest) and this is your optimum tuned position. Take note of the marked position on the tuner.

8. Lock the tuner into position by tightening the knurled ring lock nut (do not turn the tuner). Turn the nut until it is finger tight, so it won’t wriggle loose with vibrations.

Your barrel is now tuned.

9. If you plan to remove the MANAEL Barrel Tuner from the rifle, make a note of the numbered position before removal.
When you reinstall, you may need to repeat the tuning process again. However you can shortcut this by beginning the tuning process from the previously numbered position.

For example; the Tuner was performing optimally at number 4. When reinstalling, start the tuning process from number 4 (instead of 0) as you will be very close to the optimum position and will require less testing to find the sweet spot.

9. You may need to repeat this tuning process if you change ammunition or loads. Or if the MANAEL Barrel Tuner is placed on a different rifle.

Measuring your rifle for a MANAEL Barrel Tuner

So you want a Barrel Tuner to tighten groups for your centrefire or rimfire rifle, but how do you know what size tuner you need?

Let us walk you through how to measure your rifle for a MANAEL Barrel Tuner.

There are two measurements to consider for the best fit; muzzle thread size & barrel diameter.

The barrel tuner needs to snug around your barrel, with enough clearance to slide over the muzzle and barrel without making contact.


How do I measure my rifle for a MANAEL Barrel Tuner?

  1. Determine your Muzzle Thread size

    If you don’t know the pitch (TPI) of your muzzle thread, measure the outside diameter of your muzzle thread (focus on the large thread).

Use this measurement to determine the MANAEL Barrel Tuner muzzle thread type for your rifle.

If the MANAEL Barrel Tuner thread hole is too large, the tuner may not sit straight and may make contact with the barrel inside the body. This will not result in optimum performance.

For best performance, the MANAEL Barrel Tuner hole should be as close to your rifle muzzle thread as possible with just enough room to slide over the muzzle thread.

MANAEL Tuner Thread TypeMuzzle Thread sizeMuzzle Thread Diameter
5/8 Thread type5/8×24 or any thread starting with 5/8x15.8mm
1/2″ Thread type1/2×20, 1/2×28 or any thread starting with 1/2x12.7mm

2. Determine your Barrel diameter

To ensure your MANAEL Barrel Tuner is a good size for your barrel:

  • Measure the barrel diameter just behind the muzzle thread
  • Measure again 5cm back from the muzzle thread.
  • Use the larger of these two measurements.

If you’re on the middle of two sizes, or unsure about the size, its better to go for a larger size (if the MANAEL Barrel Tuner is too small, it will not fit over the barrel or may make contact which will affect performance).

Using a larger size MANAEL Barrel Tuner may cause a larger gap between the barrel and tuner. This is perfectly fine and will not affect function – so long as the Tuner is balanced and not sitting on an angle or lop sided (which is usually caused by muzzle thread sizing).

Tuner SizeBarrel Diameter
Smallup to 21mm
Large21mm – 24.5mm
Extra Large24.5mm – 27mm
Super Extra Large27mm – 32mm