Mk 14 EBR
- Category
- Battle Rifle
- Barrel
- 457 mm
- Weight, empty
- 5.10 kg
- Introduced
- 2004
About
What it is, and why it matters
The Mk 14 EBR is a select-fire battle rifle chambered in 7.62x51mm NATO, produced by Springfield Armory (US government) since 2004. This American-manufactured firearm reflects the engineering traditions and quality standards of its country of origin, designed to meet the demands of both civilian and professional users in a competitive global marketplace. Featuring a 20-round magazine capacity, this battle rifle offers generous firepower for duty use and home defense. The 18.0-inch barrel maximizes accuracy potential and ballistic performance, making this an excellent choice for target shooting, competition, or field use. At 5100g (179.9 oz), this is a substantial firearm whose weight contributes to reduced felt recoil and enhanced stability during precision shooting. The aluminum alloy frame achieves a notable weight reduction compared to all-steel construction while maintaining the structural rigidity required for safe, reliable operation. This firearm represents its manufacturer's commitment to delivering a well-engineered, reliable product that serves the needs of discerning shooters seeking quality, accuracy, and dependable performance from a proven platform.
The Mk 14 EBR was born out of necessity when U.S. forces in Afghanistan and Iraq found that the 5.56mm M4 carbine lacked the range and terminal effect needed for engagements in open terrain. By fitting old M14 rifles from Cold War-era storage into modern Sage International aluminum chassis systems, the military created an effective designated marksman rifle at a fraction of the cost of a new weapon system.
The Mk 14 EBR chassis system was designed by Sage International and uses an aircraft-grade aluminum billet construction. The Mod 0 version features an 18-inch barrel, while the Mod 2 has a 22-inch barrel for improved long-range accuracy. The M14 EBR-RI (Rock Island) variant was produced at the Rock Island Arsenal by the Weapons Product Support Integration Directorate, with approximately 5,000 units fielded by mid-2010. The M39 EMR (Enhanced Marksman Rifle) is the USMC's variant, adapted as a semi-automatic-only designated marksman rifle. The rifle's 1:12 inch twist rate is optimized for 147-175 grain projectiles. Despite its weight of approximately 14-16 pounds loaded, the Mk 14 EBR earned a reputation for reliability and accuracy in Afghanistan and Iraq, particularly in environments where the 5.56mm NATO round was found lacking in range and terminal performance.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Springfield Armory (US Government)
- Category
- Battle Rifle
- Country
- United States
- Status
- In service
- Produced
- 2004
- Variant of
- Modernized
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 457 mm
- Overall length
- 889 mm
- Weight, empty
- 5.10 kg
- Weight, loaded
- 6.35 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated rotating bolt
- Firing mechanism
- Hammer fired
- Trigger
- Two stage
- Capacity
- 20
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum alloy
- Barrel
- Chrome lined steel
- Stock
- Aluminum chassis
- Finish
- Matte black
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 975 m/s
- Muzzle energy
- 3457 J
- Effective range
- 690 m
- Maximum range
- 3725 m
- Rate of fire
- 725 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.
Select fire
Chrome lined barrel
Gas operated
Picatinny rail
Adjustable stock
Adjustable cheek piece
Pistol grip
Bipod
Quad rail handguard
Flash suppressor
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 86 7.62x51mm NATO battle rifles | 5.10 kg | 4.30 kg | Heavier than about 90% |
| Overall lengthAmong 85 7.62x51mm NATO battle rifles | 889 mm | 1025 mm | Shorter than about 90% |
| Barrel lengthAmong 87 7.62x51mm NATO battle rifles | 457 mm | 458 mm | Shorter than about 60% |
| Magazine capacityAmong 87 7.62x51mm NATO battle rifles | 20 | 20 | Near the median |
Its place in the rankings
Answers
Questions about the Mk 14 EBR
How much does the Mk 14 EBR weigh?
The Mk 14 EBR weighs 5.10 kg (11.24 lb) empty and 6.35 kg (14.00 lb) loaded.
What caliber is the Mk 14 EBR?
The Mk 14 EBR is chambered in 7.62x51mm NATO.
How many rounds does the Mk 14 EBR hold?
The Mk 14 EBR holds 20 rounds, fed from a detachable box magazine.
How long is the Mk 14 EBR?
The Mk 14 EBR is 889 mm (35.0 in) long overall, with a 457 mm (18.0 in) barrel.
Who makes the Mk 14 EBR?
The Mk 14 EBR is made by Springfield Armory (US Government) (United States). It was designed by Mike Rock.
When was the Mk 14 EBR introduced?
The Mk 14 EBR was introduced in 2004.
How does the Mk 14 EBR operate?
The Mk 14 EBR uses a gas operated rotating bolt 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 Navy SEALs
- 2004
- United States Army
- 2007
- United States Marine Corps
- 2008
- 1st Special Forces Operational Detachment-Delta
- United States
- United States Coast Guard
- United States
- Australian Special Air Service Regiment
- Australia
- Philippine Army
- Philippines
- Republic of China Armed Forces
- Taiwan
- Iraqi Armed Forces
- Iraq
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/mk-14-ebr' \ --header 'X-API-Key: your_key'{ "id": "mk-14-ebr", "name": "Mk 14 EBR", "manufacturer": { "id": "springfield-armory-us", "name": "Springfield Armory (US Government)", "countryCode": "US", "foundedYear": 1777, "website": "https://www.springfield-armory.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-04-05 22:24:37", "updatedAt": "2026-04-05 22:24:37", "version": "b9dd0910a7c8bee7c58786e8b0a8f572a1d60da9a0b15c41d155cb38023c6bd8" }, "category": { "id": "battle-rifle", "name": "Battle Rifle", "description": "Selective-fire rifles chambered in full-power cartridges" }, "country_of_origin": "US", "year_introduced": 2004, "barrel_length_mm": 457, "weight_empty_g": 5100, "action_type": "gas_operated_rotating_bolt"}