Does the CMMG MK3 work with the Tacfire 9mm 16"?
CMMG upper and TacFire barrel compatibility
Yes, they fit
The CMMG MK3 works with the Tacfire 9mm 16". Our compatibility rules found no conflict between them.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the CMMG upper and TacFire barrel
Backed by thousands of qualified builds that have both an upper and a barrel.
Share of builds with the CMMG MK3 and any barrel
CMMG MK3
- Of upper picks
- 0%
- Median paid
- $280
Tacfire 9mm 16"
- Of barrel picks
- 0.1%
- Median paid
- $87
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the CMMG upper and TacFire barrel
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Handguard
Pistol Grip
Muzzle Device

Silencerco Steel ASR Flash Hider
Fits both
Stock & Brace
CMMG MK3 vs Tacfire 9mm 16": specs and prices
| CMMG MK3 | Tacfire 9mm 16" | |
|---|---|---|
| Best price | $279.99 at Optics Planet | $87.25 at BattleHawk Armory |
| Stores | 0 of 2 in stock | 0 of 3 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-10 | n/a |
| Caliber | .308 Win | 9mm |
| Receiver Type | Billet | n/a |
| Length | n/a | 9 |
| Twist | n/a | 1:10 |
| Thread | n/a | 1/2x36 |
Both for $367.24 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Price history, last 90 days
- CMMG MK3: lowest $279.99 on Jul 5, highest $304.18 on Jul 15 over the last 90 days.
- Tacfire 9mm 16": lowest $87.25 on Jul 19, highest $108.99 on Jul 24 over the last 90 days.
Barrels frequently paired with the CMMG MK3
Most picked next to it in real builds. Only parts our rules say fit the CMMG MK3 are listed.
Upper Receivers most paired with TacFire barrels
The Tacfire 9mm 16" is not in enough builds yet, so these are the most picked next to any TacFire barrel. Only parts our rules say fit the Tacfire 9mm 16" are listed.


















