Quick Answer: Massage gun attachments are interchangeable heads that each match a different muscle shape. Use the ball head as your soft all-rounder for large muscle groups, the flat head for even pressure on quads, glutes, and pecs, the bullet (cone) head for pinpoint trigger points and small muscles, the fork (U-shaped) head to straddle the spine, neck, and Achilles, the wedge/thumb head for scraping the IT band and shoulder blades, and the dampener (cushioned) head to soften intensity near bone or on sensitive areas. Most guns ship with four to six heads; if yours is missing one or you want metal or silicone options, a universal massage gun attachment set adds six to nine heads for around $10–$25. Match the head to the body part and never drive any attachment into bone, joints, or the spine.
The attachment is half of what makes a percussion massager work — the motor supplies the speed and force, but the head decides where that force lands and how it feels. Swap a soft ball for a hard bullet and the same gun goes from a gentle warm-up tool to a deep-tissue trigger-point release. This guide explains exactly what each head does, which one to reach for on every body part, how to check compatibility, and the best replacement-head sets worth buying.
Massage gun attachments at a glance
| Attachment | Shape | Best for | Pressure | Avoid |
|---|---|---|---|---|
| Ball | Round, soft/foam | All-purpose, large muscles, beginners | Gentle | — |
| Flat | Disc | Quads, glutes, pecs, general flushing | Medium | Bone, joints |
| Bullet / Cone | Single point | Trigger points, knots, feet, forearms | Strong / deep | Spine, joints, bone |
| Fork / U-shape | Two prongs | Spine sides, neck, traps, Achilles, shins | Medium | Directly on spine/throat |
| Wedge / Thumb | Flat blade | IT band, shoulder blades, "scraping" | Medium-focused | Bony ridges |
| Dampener / Cushion | Air-filled / soft | Bone-adjacent areas, sensitive users | Soft | — |
What each massage gun head actually does
Ball head — the all-rounder
The ball is the head that ships installed on most guns, and for good reason. It’s slightly softer than the other attachments, spreads force over a broad surface, and mimics the kneading of a masseuse’s palm — which is why it’s the head beginners should leave on. Per RENPHO’s head guide, the ball suits muscle soreness and circulation across calves, forearms, and most large groups. If you only ever use one head, make it this one.
Flat head — large muscles and flushing
The flat disc delivers broad, even pressure and is built for big muscle groups: quads, glutes, pectorals, and hamstrings. It’s the head you want for general post-workout “flushing” — long, sweeping passes that move blood through a fatigued muscle. It’s firmer than the ball but still safe over most soft tissue.
Bullet (cone) head — trigger points and knots
The bullet concentrates the gun’s entire output into a single point, so it delivers the strongest, deepest sensation of any standard head. Reach for it on stubborn knots, scar tissue, and small muscles — the arches of the feet, the forearms, the space between toes and fingers. The trade-off is that it’s the easiest head to overdo: keep it on soft tissue, off bone and joints, and never on the spine.
Fork (U-shaped) head — spine, neck, and Achilles
The fork’s two prongs are designed to straddle a bone. On the back, they press into the paraspinal muscles on either side of the vertebrae without ever contacting the spine itself — the single most important safety feature of any head. It’s also the go-to for the upper trapezius, the neck, the Achilles tendon, and the shins. Because it brackets bone instead of hitting it, the fork is the safest head for the neck and back.
Wedge (thumb) head — IT band and shoulder blades
The wedge mimics the pressure a therapist applies with a thumb — more focused than the ball, gentler than the bullet. Its blade shape is ideal for “scraping and rinsing” motions along the IT band and around the shoulder blades, which many users find helps flush lactic acid from long, flat muscles after endurance work.
Dampener (cushioned) head — sensitive and bone-adjacent areas
The dampener is a soft, often air-filled head that takes the edge off each pulse. Use it where a muscle sits close to bone, on tender areas, or when you’re new to percussion therapy and the standard heads feel too intense. It’s the most forgiving attachment in the kit.
Heat and cold heads — the newest add-ons
A growing number of 2026 guns include thermal heads. Heated heads (like those on the Bob and Brad D6 Pro Plus) warm muscle before a session to loosen tissue, while cold/stainless heads cool inflamed areas afterward — the stainless-steel flat head sold as a metal massage gun replacement head doubles as a cold-therapy tool because the metal can be chilled. For a full breakdown of thermal guns, see our best heated massage gun guide.
Which attachment for which body part
| Body part | Best head | Speed | Note |
|---|---|---|---|
| Neck & upper traps | Fork / dampener | Low | Straddle the spine; never the throat |
| Shoulders / rotator cuff | Ball / wedge | Low-med | Stay on muscle, off the joint |
| Back (either side of spine) | Fork | Low-med | Prongs bracket the vertebrae |
| Quads / hamstrings / glutes | Flat / ball | Med-high | Large muscles take more force |
| IT band / outer thigh | Wedge | Med | Scrape along the band |
| Calves / shins | Ball / fork | Med | Fork follows the shin bone |
| Feet / forearms / hands | Bullet | Low-med | Pinpoint small muscles |
| Knots & trigger points | Bullet | Med | Hold, don't grind, on the knot |
For a deeper walkthrough of technique and timing, pair this with our how to use a massage gun guide.
Are massage gun attachments universal? Checking compatibility
This is the question that trips most people up. There are two mounting systems:
- Push-in (plug) stem — the most common. The head has a stem that pushes into a round socket on the gun. Generic universal sets are typically listed for sockets in the 16mm to 19mm range; the stainless flat head above, for example, is listed with an 18mm outer diameter for guns with a ~17.5mm inner diameter, per its Amazon product page. Measure your gun’s socket (or an existing head’s stem) before buying.
- Proprietary mounts — premium brands like Theragun (Therabody) and some Hypervolt models use their own attachment system. For those, buy genuine Theragun attachments or the matching brand heads rather than a generic set.
If your gun uses the common plug stem, a six-to-nine-piece universal kit will cover the heads your gun didn’t include — at a fraction of the cost of buying single OEM heads.
Best massage gun attachment sets to buy in 2026
Every link below is an Amazon search for the product so you always land on the current listing and price.
Universal 9-Piece Attachment Set — Best Overall
- Nine plug-and-play heads — ball, U-shape, flat, small round, bullet and more — covering every body part in one kit.
- Mixed materials (silicone, metal, EVA, ABS) so you get soft and firm options together.
- Designed for the common push-in socket — check yours is in the ~16–19mm range first.
Stainless-Steel Metal Flat Head — Best for Cold Therapy
- Solid stainless flat head you can chill in the freezer for cold-therapy passes after training.
- 18mm outer diameter, compatible with most ~17.5mm sockets, per the listing.
- Washes under water and won't absorb sweat or odor like foam heads.
Silicone Replacement Head Set — Best for Sensitive Skin
- Food-grade silicone heads that grip skin gently and clean easily — good over sensitive or bony areas.
- Plug-and-play stems in common diameters; multiple shapes in one pack.
- A softer alternative to hard plastic when the standard heads feel too aggressive.
Genuine Theragun Attachments — Best for Therabody Guns
- OEM heads sized for Theragun's proprietary mount — the right call if you own a Theragun.
- Includes Therabody's signature shapes (dampener, standard ball, thumb, cone, wedge).
- Guaranteed fit and finish where generic stems won't seat correctly.
6-Piece Trigger-Point Set — Best Budget Kit
- Six core shapes — large/small ball, U-fork, bullet, T-bar, flat — the essentials for under $15.
- Lightweight set that throws in the bullet and fork heads many cheap guns leave out.
- The easiest way to upgrade a budget gun's effectiveness for the price of lunch.
Care, replacement, and safety
- Wipe heads after every session. Sweat and skin oils break down foam and EVA over time; silicone and metal heads simply rinse clean.
- Replace worn heads. A cracked or compressed foam head transmits force unevenly — swap it once it loses its shape.
- Never on bone, joints, the spine, or the throat. This is the one rule that never changes regardless of which attachment you fit. Use the fork to bracket the spine and the dampener near bone.
- Match material to need. Foam and silicone for comfort, hard plastic and metal for depth and durability, metal again for cold therapy.
The bottom line
Attachments are the cheapest, biggest upgrade you can make to any percussion massager. Keep the ball on for everyday use, fit the bullet for knots, the fork for your spine and neck, and the flat for big muscles. If your gun came up short on heads, a universal massage gun attachment set fills the gaps for around $15 — just confirm your socket is the common 16–19mm push-in type, or buy genuine Theragun heads if you own a Theragun.
New to percussion therapy or still choosing a gun? Start with our best massage gun roundup, the budget-focused best budget massage gun guide, and our walkthrough on how to use a massage gun safely.