Angstadt Arms MDP-9
- Category
- Pistol
- Barrel
- 149 mm
- Weight, empty
- 1.68 kg
- Introduced
- 2022
About
What it is, and why it matters
The Angstadt Arms MDP-9 (Modular Defense Pistol) is a roller-delayed blowback 9x19mm pistol that feeds from GLOCK double-stack magazines, representing the company's most advanced AR-platform PCC. Unlike the straight-blowback UDP-9, the MDP-9 GEN2 uses a roller-delayed action paired with a 5.85-inch chrome moly Melonite barrel and a removable three-lug muzzle device on 1/2x28 threads, delivering notably softer recoil and a lighter reciprocating mass. It features a 7075-T6 monolithic upper receiver with a continuous Picatinny top rail, a billet lower with flared magwell, a non-reciprocating ambidextrous forward charging handle, last-round bolt hold open, an Angstadt Arms EMT-9 trigger, a Radian Weapons Talon ambidextrous selector and a B5 Systems Type 23 grip. At just 3.7 pounds unloaded and 14 inches overall, the MDP-9 is exceptionally compact. It is manufactured in Charlotte, NC and offered in black Type III hard-coat anodize, Magpul FDE and Tactical Grey Cerakote, as both a braced pistol and a registered SBR.
The MDP-9 brought roller-delayed operation - a system associated with the HK MP5 - to an AR-style GLOCK-magazine pistol, positioning it as Angstadt Arms' flagship modular defense platform.
MSRP approximately $2,175. Ships with two OEM GLOCK 17-round magazines. The roller-delayed action and non-reciprocating charging handle distinguish the MDP-9 from the blowback UDP-9. SBR variant adds a stock and requires a tax stamp.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Angstadt Arms
- Category
- Pistol
- Country
- United States
- Status
- In production
- Produced
- 2022
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 149 mm
- Overall length
- 356 mm
- Height
- 178 mm
- Width
- 64 mm
- Weight, empty
- 1.68 kg
- Weight, loaded
- 1.95 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Roller delayed blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Trigger pull
- 22.0 N
- Capacity
- 17
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum alloy
- Barrel
- Steel
- Finish
- Anodized
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 375 m/s
- Muzzle energy
- 524 J
- Effective range
- 100 m
- Maximum range
- 1800 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- Glock compatible
Monolithic upper
Last round bolt hold open
Ambidextrous controls
Non reciprocating charging handle
Threaded barrel
Flared mag well
Picatinny rail
Billet receivers
Compact design
Modular design
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 560 9x19mm Parabellum pistols | 1.68 kg | 765 g | Heavier than about 90% |
| Overall lengthAmong 559 9x19mm Parabellum pistols | 356 mm | 191 mm | Longer than about 90% |
| Barrel lengthAmong 569 9x19mm Parabellum pistols | 149 mm | 105 mm | Longer than about 90% |
| Magazine capacityAmong 571 9x19mm Parabellum pistols | 17 | 15 | Holds more rounds than about 80% |
Answers
Questions about the Angstadt Arms MDP-9
How much does the Angstadt Arms MDP-9 weigh?
The Angstadt Arms MDP-9 weighs 1.68 kg (3.70 lb) empty and 1.95 kg (4.30 lb) loaded.
What caliber is the Angstadt Arms MDP-9?
The Angstadt Arms MDP-9 is chambered in 9x19mm Parabellum.
How many rounds does the Angstadt Arms MDP-9 hold?
The Angstadt Arms MDP-9 holds 17 rounds, fed from a detachable box magazine.
How long is the Angstadt Arms MDP-9?
The Angstadt Arms MDP-9 is 356 mm (14.0 in) long overall, with a 149 mm (5.87 in) barrel.
Who makes the Angstadt Arms MDP-9?
The Angstadt Arms MDP-9 is made by Angstadt Arms (United States). It was designed by Angstadt Arms.
When was the Angstadt Arms MDP-9 introduced?
The Angstadt Arms MDP-9 was introduced in 2022.
How does the Angstadt Arms MDP-9 operate?
The Angstadt Arms MDP-9 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.
Provenance
Confidence in this record
80%
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/angstadt-mdp-9' \ --header 'X-API-Key: your_key'{ "id": "angstadt-mdp-9", "name": "Angstadt Arms MDP-9", "manufacturer": { "id": "angstadt-arms", "name": "Angstadt Arms", "countryCode": "US", "foundedYear": 2014, "website": "https://angstadtarms.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": "97716f130096d028e6c8d9d172b4553f69399d91abca2f2160cdfbb9ed19e355" }, "category": { "id": "pistol", "name": "Pistol", "description": "Handguns designed to be fired with one or two hands" }, "country_of_origin": "US", "year_introduced": 2022, "barrel_length_mm": 149, "weight_empty_g": 1678, "action_type": "roller_delayed_blowback"}