ST Kinetics BMCR
- Category
- Assault Rifle
- Barrel
- 368 mm
- Weight, empty
- 2.90 kg
- Introduced
- 2014
About
What it is, and why it matters
The ST Kinetics BMCR (Bullpup Multirole Combat Rifle) is a prototype Singaporean assault rifle unveiled at the 2014 Singapore Airshow as the world's shortest bullpup carrying a 14.5-inch barrel. The fully ambidextrous gas-operated rifle was designed with forward case ejection so it can be safely fired from either shoulder, and was offered in 5.56x45mm NATO, 6.8mm Remington SPC, and 7.62x39mm. The BMCR remained a prototype and eventually evolved into the BR18 announced in 2018.
The BMCR was marketed by ST Kinetics as 'the world's shortest bullpup,' and its rotating bolt was designed so that the case ejection direction could be reversed in seconds, making it one of the very few truly ambidextrous bullpups ever offered.
Remarkable barrel-to-overall-length ratio: a 368mm (14.5 inch) barrel housed in a 645mm rifle. Featured a proprietary dry-lubricant barrel coating to repel sand, dust and powder soot, plus over-the-beach capability for amphibious operations.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- ST Engineering Land Systems
- Category
- Assault Rifle
- Country
- Singapore
- Status
- Prototype
- Produced
- 2014
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 368 mm
- Overall length
- 645 mm
- Weight, empty
- 2.90 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated short stroke
- 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
- Polymer
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Phosphate
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 870 m/s
- Effective range
- 500 m
- Rate of fire
- 750 rpm
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.
Bullpup configuration
Fully ambidextrous
Forward case ejection
Picatinny rails three six nine twelve
Dry lubricant barrel coating- Over the beach capable
Multi caliber capable
Modular handguard
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 158 5.56x45mm NATO assault rifles | 2.90 kg | 3.60 kg | Lighter than about 90% |
| Overall lengthAmong 156 5.56x45mm NATO assault rifles | 645 mm | 920 mm | Among the shortest tenth |
| Barrel lengthAmong 157 5.56x45mm NATO assault rifles | 368 mm | 449 mm | Shorter than about 80% |
| Magazine capacityAmong 158 5.56x45mm NATO assault rifles | 30 | 30 | Near the median |
Answers
Questions about the ST Kinetics BMCR
How much does the ST Kinetics BMCR weigh?
The ST Kinetics BMCR weighs 2.90 kg (6.39 lb) empty.
What caliber is the ST Kinetics BMCR?
The ST Kinetics BMCR is chambered in 5.56x45mm NATO.
How many rounds does the ST Kinetics BMCR hold?
The ST Kinetics BMCR holds 30 rounds, fed from a detachable box magazine.
How long is the ST Kinetics BMCR?
The ST Kinetics BMCR is 645 mm (25.4 in) long overall, with a 368 mm (14.5 in) barrel.
Who makes the ST Kinetics BMCR?
The ST Kinetics BMCR is made by ST Engineering Land Systems (Singapore). It was designed by ST Kinetics design team.
When was the ST Kinetics BMCR introduced?
The ST Kinetics BMCR was introduced in 2014.
How does the ST Kinetics BMCR operate?
The ST Kinetics BMCR uses a gas operated short stroke 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.
Provenance
Confidence in this record
78%
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/st-kinetics-bmcr' \ --header 'X-API-Key: your_key'{ "id": "st-kinetics-bmcr", "name": "ST Kinetics BMCR", "manufacturer": { "id": "st-kinetics", "name": "ST Engineering Land Systems", "countryCode": "SG", "foundedYear": 1967, "website": "https://www.stengg.com", "logoUrl": null, "description": "Singapore defense contractor specializing in armored vehicles and ground combat systems. Historically produced small arms including the Ultimax 100 light machine gun and SAR 21 bullpup rifle.", "status": "active", "defunctYear": null, "stateOwned": null, "makesFirearms": true, "parentId": null, "predecessorId": null, "createdAt": "2026-02-18 03:40:48", "updatedAt": "2026-09-15 07:19:19", "version": "60b09a84aaed1bb6ff46e4d8f29b675171e7f36c2772f1aafc8dcf4bf0262e2e" }, "category": { "id": "assault-rifle", "name": "Assault Rifle", "description": "Selective-fire rifles chambered in intermediate cartridges" }, "country_of_origin": "SG", "year_introduced": 2014, "barrel_length_mm": 368, "weight_empty_g": 2900, "action_type": "gas_operated_short_stroke"}