PTR 91
- Category
- Battle Rifle
- Barrel
- 457 mm
- Weight, empty
- 4.31 kg
- Introduced
- 2002
About
What it is, and why it matters
The PTR 91 is the flagship American-made roller-delayed blowback battle rifle from PTR Industries, a faithful semi-automatic clone of the Heckler & Koch G3/HK91 chambered in .308 Winchester (7.62x51mm). PTR builds the platform on the original H&K-pattern tooling and machinery acquired from Fabrica de Brao de Prata in Portugal (FMP), giving it genuine roller-locked heritage. The 18-inch stress-relieved, tapered barrel is threaded 5/8x24 for suppressors and muzzle devices, the stamped-steel receiver carries a welded steel Picatinny rail for optics, and the rifle uses the signature fluted chamber and drum diopter sights of the G3 family. Modern catalog configurations are sold under the GI, GIR, GIRK and A3S model names.
PTR Industries (originally JLD Enterprises) was founded in 1997 and acquired genuine Heckler & Koch G3 tooling and gauges from the Portuguese state arsenal FMP, making the PTR 91 the most authentic American-built HK91/G3 clone available. When pre-ban HK91 prices soared after the 1989 import ban, PTR became the standard-bearer for the roller-delayed .308 platform in the United States.
MSRP approximately $1,529-$1,725 depending on configuration. Made in Aynor, South Carolina, USA. The PTR 91 line is sold today as GI (surplus furniture), GIR (rail-equipped), GIRK (K-length rail) and A3S (modern fixed-stock). Trigger pull 9-10 lbs. Ships with one 20-round aluminum magazine and cable lock.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- PTR Industries
- Category
- Battle Rifle
- Country
- United States
- Status
- In production
- Produced
- 2002
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 457 mm
- Overall length
- 1029 mm
- Weight, empty
- 4.31 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Roller delayed blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 20
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Stamped steel
- Barrel
- Chrome moly steel
- Stock
- Polymer
- Finish
- Phosphate
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 780 m/s
- Muzzle energy
- 3100 J
- Effective range
- 500 m
- Maximum range
- 1000 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.
Roller delayed blowback
Stamped steel receiver
Fluted chamber
Rotary diopter drum rear sight
Polymer furniture
Threaded muzzle
Welded steel picatinny rail
Made in usa
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 | 4.31 kg | 4.30 kg | Heavier than about 60% |
| Overall lengthAmong 85 7.62x51mm NATO battle rifles | 1029 mm | 1025 mm | Near the median |
| 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 |
Answers
Questions about the PTR 91
How much does the PTR 91 weigh?
The PTR 91 weighs 4.31 kg (9.50 lb) empty.
What caliber is the PTR 91?
The PTR 91 is chambered in 7.62x51mm NATO.
How many rounds does the PTR 91 hold?
The PTR 91 holds 20 rounds, fed from a detachable box magazine.
How long is the PTR 91?
The PTR 91 is 1029 mm (40.5 in) long overall, with a 457 mm (18.0 in) barrel.
Who makes the PTR 91?
The PTR 91 is made by PTR Industries (United States).
When was the PTR 91 introduced?
The PTR 91 was introduced in 2002.
How does the PTR 91 operate?
The PTR 91 uses a roller 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
- US civilian market
- 2002
Provenance
Confidence in this record
85%
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/ptr-91' \ --header 'X-API-Key: your_key'{ "id": "ptr-91", "name": "PTR 91", "manufacturer": { "id": "ptr-industries", "name": "PTR Industries", "countryCode": "US", "foundedYear": 1997, "website": "https://www.ptr-us.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-05-26 23:17:02", "updatedAt": "2026-05-26 23:17:02", "version": "4a695a04678d38a3d8f616171095bbcf66a3875235954454143dbc622fee2b62" }, "category": { "id": "battle-rifle", "name": "Battle Rifle", "description": "Selective-fire rifles chambered in full-power cartridges" }, "country_of_origin": "US", "year_introduced": 2002, "barrel_length_mm": 457, "weight_empty_g": 4309, "action_type": "roller_delayed_blowback"}