CMMG Banshee Mk10
- Category
- Personal Defense Weapon
- Barrel
- 203 mm
- Weight, empty
- 2.50 kg
- Introduced
- 2020
About
What it is, and why it matters
The CMMG Banshee Mk10 is an AR-pattern personal defense weapon pistol/SBR chambered in 10mm Auto, built around CMMG's proprietary Radial Delayed Blowback (RDB) action, which uses angled bolt lugs that rotate to delay the action opening under the high pressure of the 10mm cartridge. It feeds from Glock 20/29-pattern magazines and ships with 30-round SGM Tactical magazines, making it a companion carbine to Glock 10mm pistols. The standard configuration uses an 8-inch 4140 chrome-moly steel barrel with a 1:16 twist, 7075-T6 aluminum forged upper and lower receivers, an M-LOK handguard, and an SB Tactical SBA3 adjustable arm brace, finished in hardcoat anodizing under Cerakote in a range of colors.
CMMG added the 10mm Auto Mk10 to its Banshee line to answer demand for a hard-hitting AR-format PDW that shares magazines with Glock 10mm pistols such as the Glock 20 and Glock 29. Taming the high-pressure 10mm cartridge in an AR host required CMMG's proprietary Radial Delayed Blowback system, which it had already proven on smaller Banshee chamberings, making the Mk10 one of the few commercially successful AR-pattern 10mm carbine platforms.
Radial Delayed Blowback uses a rotating bolt head to mechanically delay unlocking - closest schema enum is `delayed_blowback`. Overall length is 23.8-27 in depending on the SBA3 brace setting; 605 mm reflects the collapsed length. Manufacturer/American Rifleman list 5.5 lb (~2495 g) unloaded. Ships with a heavier 3.4 oz bolt weight and extra buffer tuned for 10mm. SBR variant substitutes a RipStock for the pistol brace.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- CMMG Inc.
- Category
- Personal Defense Weapon
- Country
- United States
- Status
- In production
- Produced
- 2020
- Variant of
- Caliber variant 10mm auto
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 203 mm
- Overall length
- 605 mm
- Weight, empty
- 2.50 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Delayed blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 30
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Cerakote
BallisticsFrom the service cartridge, not a handload.
- Effective range
- 100 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Radial delayed blowback
Ar15 pattern
Ambidextrous controls
60 degree safety throw
M lok handguard
Top picatinny rail
1 2x28 threaded muzzle
Suppressor compatible
Sb tactical sba3 brace- Hinged grip storage compartment
Polymer dust cover
Glock pattern magazine compatible
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 54 personal defense weapons | 2.50 kg | 2.23 kg | Heavier than about 60% |
| Overall lengthAmong 53 personal defense weapons | 605 mm | 582 mm | Longer than about 60% |
| Barrel lengthAmong 55 personal defense weapons | 203 mm | 168 mm | Longer than about 70% |
| Magazine capacityAmong 57 personal defense weapons | 30 | 30 | Holds more rounds than about 70% |
Answers
Questions about the CMMG Banshee Mk10
How much does the CMMG Banshee Mk10 weigh?
The CMMG Banshee Mk10 weighs 2.50 kg (5.50 lb) empty.
What caliber is the CMMG Banshee Mk10?
The CMMG Banshee Mk10 is chambered in 10mm Auto.
How many rounds does the CMMG Banshee Mk10 hold?
The CMMG Banshee Mk10 holds 30 rounds, fed from a detachable box magazine.
How long is the CMMG Banshee Mk10?
The CMMG Banshee Mk10 is 605 mm (23.8 in) long overall, with a 203 mm (7.99 in) barrel.
Who makes the CMMG Banshee Mk10?
The CMMG Banshee Mk10 is made by CMMG Inc. (United States).
When was the CMMG Banshee Mk10 introduced?
The CMMG Banshee Mk10 was introduced in 2020.
How does the CMMG Banshee Mk10 operate?
The CMMG Banshee Mk10 uses a delayed blowback action, and its firing mechanism is hammer fired.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
In service
- Civilian market
- 2020
Provenance
Confidence in this record
82%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/cmmg-banshee-mk10' \ --header 'X-API-Key: your_key'{ "id": "cmmg-banshee-mk10", "name": "CMMG Banshee Mk10", "manufacturer": { "id": "cmmg", "name": "CMMG Inc.", "countryCode": "US", "foundedYear": 2002, "website": "https://cmmg.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:38", "updatedAt": "2026-02-18 03:43:43", "version": "a7e68de40df3e6e52ce7309f32c551e46f69ca644a4955a2de5291d2bfbf7a0b" }, "category": { "id": "personal-defense-weapon", "name": "Personal Defense Weapon", "description": "Compact firearms designed for non-frontline military personnel" }, "country_of_origin": "US", "year_introduced": 2020, "barrel_length_mm": 203, "weight_empty_g": 2495, "action_type": "delayed_blowback"}