Massage Gun Attachments: Which Head to Use (and How to Fit Them)
Massage gun attachments only help if they fit the stem and match the muscle. Measure the head you already own, then add shapes you are actually missing.
By Nate Brooks
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The short answer: Measure the stem on a head that already fits, then buy only the shapes you are missing. Extra massage gun attachments will not fix a weak gun. They just let you match contact to the muscle.
Our picks
Most massage guns already ship with a starter set. The search for massage gun attachments usually means one of two jobs: a head broke, or you keep wishing for a shape that was not in the box. This page is that smaller purchase, not a second gun.
If you still need the tool itself, read best massage gun first. Specs and fit notes below come from live US listings and owner comments. We have not lab-tested every aftermarket stem.
Start with the gun you already own
Pull one head that seats firmly. Measure the outer diameter of the stem, not the face of the head. Full-size guns often sit near 18 to 19 mm. Travel minis are often closer to 12 to 13 mm. A 1 mm miss is enough for rattle or a head that will not go in.
Write the number on a piece of tape on the case. Future-you will not remember it at checkout.
Brand names are a weak filter. Plenty of “universal” kits skip Theragun proprietary stems or Hyperice mini sizes. If the listing says it does not fit a brand you own, believe it.
What each common head is for
Think of attachments as contact patches, not magic programs.
You do not need all of them. You need the two or three you will actually swap in.
If your real complaint is mid-back while you sit, a back massager cushion may beat another percussion head. If the issue is lower legs after standing work, a calf massager is a different tool.
Specialty add-on: double-head set
The Double Head Massage Gun Attachment Set is a live US add-on when you already have a standard-stem gun and want a dual-contact piece, not a complete starter kit. The listing carries a 4.0-plus rating and a few hundred reviews, which is enough ownership signal to see the usual fit complaints.
Treat it as a measured accessory. If your stem does not match, it will either fall out or refuse to seat. That is the number one review theme across aftermarket heads, including this style.
Buy it if you specifically want a two-contact head and you measured. Skip it if you still need a full ball-flat-fork kit, or if you do not own a gun yet.
How to use attachments without wrecking a session
Change heads with the motor off. Wipe the stem so grit does not grind the socket. Start on a large muscle with the ball, then switch only if the contact patch is clearly wrong.
Keep the gun moving. A small head parked on one spot is how people bruise themselves and then blame the brand. Thirty to sixty seconds per area is enough for most home use.
Stay off the front of the neck, the throat, and anything that feels nerve-sharp. A foam roller still wins for slow, broad tissue work on some days. See best foam roller if you want that slower tool.
Fit problems, in plain English
Too loose: the head walks out mid-session. Wrong diameter or a worn O-ring. Return it.
Too tight: you are forcing a mini head into a full-size socket, or the opposite. Stop. You can crack a cheap socket.
Whistle or squeak: common on hollow or air-cushion heads. Annoying, not always a defect. If it bothers you, use a solid ball.
Broken original ball: replace that one shape. You do not need a 12-piece suitcase.
Who should skip extra heads
Skip a big aftermarket bundle if your gun already has ball, flat, and fork and you like them. Skip mystery kits with no stem measurement. Skip buying attachments as a gift unless you know the exact gun.
Also skip this page’s add-on if you were actually shopping for a first percussion tool. Start with the gun guide, then come back when a specific head is missing.
Buying checklist
- Measure a seated stem in millimeters.
- Match that number to the listing, including mini vs full-size warnings.
- Buy the missing shape, not a duplicate ball.
- Confirm the live Amazon title still describes replacement heads, not a whole gun.
- Keep the receipt until you test-fit with the motor off.
Bottom line
Massage gun attachments are a fit problem first and a shopping problem second. Measure, then add only what your kit lacks. If you already own a matching stem and want a dual-contact piece, the Double Head Massage Gun Attachment Set is the verified add-on on this page. More recovery gear lives on the blog and the homepage.
Frequently Asked Questions
Do I need extra massage gun attachments?
Only if your stock kit is missing a shape you keep wanting. Most home buyers can live with ball, flat, and fork heads for months.
How do I know they will fit my gun?
Measure the stem on a head that already seats firmly. Compare that number to the listing. Do not guess from the brand name. Mini guns often use a smaller stem than full-size guns.
What does the ball head do?
Large, meaty areas: quads, glutes, calves. It is the default for most people. Skip it on bony spots.
When should I use a fork or U-shaped head?
Around the spine and Achilles, where you want contact on both sides of a bony line. Do not jam it into the vertebrae.
Are air-cushion heads worth it?
They feel softer on joints and IT band work. Some whistle or shed the rubber sleeve. Fine as a comfort option, not as your only head.
Can I use massage gun attachments on my neck?
Be conservative. Use the smallest, softest head, keep the gun moving, and stay off the front of the neck. A dedicated neck massager is often the better tool there.
Why do replacement heads fall out?
The stem is too small, the O-ring is worn, or you bought mini heads for a full-size gun. Return them. Do not tape a loose head onto a running motor.
Should I buy attachments instead of a better gun?
No. Attachments do not add stall force. If the gun itself is weak or loud in a bad way, start with best massage gun rather than a drawer of unused tips.