FightLite MXR
- Category
- Personal Defense Weapon
- Barrel
- 178 mm
- Weight, empty
- Not recorded
- Introduced
- 2017
About
What it is, and why it matters
The FightLite MXR is a multi-caliber AR-15-style modular firearm platform that can be configured as a pistol, carbine, or select-fire submachine gun. Using a tool-free modular barrel-and-bolt retention system, the user can swap between .22 LR, 9mm NATO, .357 SIG, .40 S&W, 10mm Auto, .45 ACP, and FN 5.7x28mm without armorer-level work. Standard pistol-caliber configurations accept a wide range of common magazine types - Glock, SIG, Beretta, CZ, S&W - making the MXR exceptionally adaptable for civilian, law-enforcement, and military users. The monolithic receiver, MIL-STD-1913 rails, M-LOK interfaces, and AR-15-pattern fire control group keep the platform familiar to AR shooters while delivering pistol-caliber softness and suppressor compatibility.
Unveiled at SHOT Show 2017, the MXR was FightLite's answer to the modern PCC arms race - instead of picking one cartridge, Herring's team built a platform that could become any of seven different chamberings in the time it takes to swap a coffee filter.
Pistol/carbine/SMG modularity; barrel and bolt swap is tool-free at the user level. Standard 7" barrel and compact 5" 'K' model. Right-hand ejection only. Reciprocating reversible left-side charging handle.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- FightLite Industries
- Category
- Personal Defense Weapon
- Country
- United States
- Status
- In production
- Produced
- 2017
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 178 mm
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 17
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Hard coat anodized
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 380 m/s
- Muzzle energy
- 537 J
- Effective range
- 100 m
- Maximum range
- 200 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.
Modular caliber system- Tool free caliber change
Glock magazine compatible
Sig magazine compatible- Beretta magazine compatible
- Cz magazine compatible
Monolithic receiver
Picatinny rail
M lok handguard
Ar 15 fire control- Ar brace interface
Ambidextrous controls
Left side charging handle
Threaded barrel
Suppressor capable
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 |
|---|---|---|---|
| Barrel lengthAmong 55 personal defense weapons | 178 mm | 168 mm | Longer than about 60% |
| Magazine capacityAmong 25 9x19mm Parabellum personal defense weapons | 17 | 20 | Holds fewer rounds than about 70% |
Answers
Questions about the FightLite MXR
What caliber is the FightLite MXR?
The FightLite MXR is chambered in 9x19mm Parabellum, 10mm Auto, .45 ACP, and 5.7x28mm FN.
How many rounds does the FightLite MXR hold?
The FightLite MXR holds 17 rounds, fed from a detachable box magazine.
How long is the FightLite MXR?
The FightLite MXR has a 178 mm (7.01 in) barrel.
Who makes the FightLite MXR?
The FightLite MXR is made by FightLite Industries (United States). It was designed by Geoffrey A. Herring.
When was the FightLite MXR introduced?
The FightLite MXR was introduced in 2017.
How does the FightLite MXR operate?
The FightLite MXR uses a 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
- United States Civilian Market
- 2017
Provenance
Confidence in this record
70%
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/fightlite-mxr' \ --header 'X-API-Key: your_key'{ "id": "fightlite-mxr", "name": "FightLite MXR", "manufacturer": { "id": "fightlite-industries", "name": "FightLite Industries", "countryCode": "US", "foundedYear": 1997, "website": "https://fightlite.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-05-04 12:38:54", "updatedAt": "2026-05-04 12:38:54", "version": "172124003bb72ed19b100361a7167808596b5ac703dfd54e651d7aa95f4265e8" }, "category": { "id": "personal-defense-weapon", "name": "Personal Defense Weapon", "description": "Compact firearms designed for non-frontline military personnel" }, "country_of_origin": "US", "year_introduced": 2017, "barrel_length_mm": 178, "weight_empty_g": null, "action_type": "blowback"}