# Angstadt UDP-556 Rifle - 16" 5.56 NATO, Semi-Auto, Black

**Brand:** Angstadt Arms
**Category:** Semi-Automatic Rifles
**Caliber:** 5.56 NATO

## Specifications

- **Caliber:** 5.56 NATO
- **Barrel Length:** 16"
- **Capacity:** 30 rounds
- **UPC:** 850035894026
- **SKU:** UCExqpz1G

## Description

The Angstadt Arms UDP-556 is a semi-automatic modern sporting rifle chambered in 5.56 NATO with a 16-inch barrel and 30-round capacity. It ships in black and is made in the USA.

### Key Specifications
- **Model:** UDP-556
- **Caliber:** 5.56 NATO
- **Barrel Length:** 16 inches
- **Capacity:** 30 rounds
- **Condition:** New in Box
- **Finish Per Color:** Black
- **Manufacturer:** Angstadt Arms
- **Manufacturer Part Number:** AAUDP56R0R
- **Type:** Modern Sporting Rifle

### Features

The flared magwell speeds up magazine changes without requiring a precise index. A threaded bolt catch screw resists loosening under repeated cycling, and an upper tension screw adds stability to the upper receiver fit. The B5 Systems Type-23 grip has a texture and geometry that works for a range of hand sizes. The 16-inch barrel uses 4150 Chrome Moly steel with a 1:7 twist, which handles the full 5.56 NATO pressure spec and stabilizes heavier projectiles well.

## Frequently Asked Questions

**Q: What caliber is the UDP-556?**

A: The UDP-556 is chambered in 5.56 NATO.

**Q: Who makes the UDP-556?**

A: The UDP-556 is made by Angstadt Arms.

**Q: What type of firearm is the UDP-556?**

A: It is a semi-automatic modern sporting rifle.

**Q: What is the barrel length of the UDP-556?**

A: The UDP-556 has a 16-inch barrel made from 4150 Chrome Moly steel with a 1:7 twist rate.

**Q: How many rounds does the UDP-556 hold?**

A: It has a 30-round capacity.

**Q: Where can I buy the UDP-556?**

A: Compare current vendor offers on this page.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> These things are quality like I mentioned I've had this thing for a few years and I have not had one malfunction with it this thing has ran flawlessly.
>
> — [Ballistically Challenged](https://www.youtube.com/watch?v=DfTXfxdw97M&t=58s)

> This thing shoots really reliable it's soft shooting even softer than some of the ones that I've built myself.
>
> — [Ballistically Challenged](https://www.youtube.com/watch?v=DfTXfxdw97M&t=195s)

> There's nothing worse than being out there shooting and your hand slides forward a little bit and touches that hot muzzle device.
>
> — [Ballistically Challenged](https://www.youtube.com/watch?v=DfTXfxdw97M&t=316s)

> My favorite pistol caliber carbing that I have because it's so versatile it's lightweight small and I've never had a malfunction with it I trust this thing 100%.
>
> — [Ballistically Challenged](https://www.youtube.com/watch?v=DfTXfxdw97M&t=459s)

## What Customers Say

*AI-generated insights from customer reviews*

The UDP-556 gets positive marks for its compact, light build and the reliability of the semi-auto action. Owners running it at the range find the 5.56 recoil easy to manage, and the build quality, materials and fit, holds up well in reviews. Accuracy at distance comes up often as a selling point.

The main criticisms are about value relative to competitors. Some buyers feel there are other rifles at a lower price point with similar specs, and a few note limited parts and accessory availability specific to this model. Ergonomics draw occasional comment too. Some users would prefer a different stock profile or grip texture for longer sessions.

On balance, the reception is positive. The durability and reliability get more praise than the price gets criticism.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $1471.99 |

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*Data from [GunsNation](https://gunsnation.com)*