# Spike's Tactical ST15 Black Anodized Multi-Caliber Receiver

**Brand:** Spikes Tactical
**Category:** Parts
**Caliber:** Multi-Caliber

## Specifications

- **Caliber:** Multi-Caliber
- **UPC:** 855713006005
- **SKU:** UCF432ZBV

## Description

The Spike's Tactical ST15 Stripped Flat Top Upper Receiver is a 7075-T6 aluminum upper for AR-15-pattern builds, finished in black hard coat anodize. It has no sights or barrel installed. It's a stripped receiver ready for a builder to add their preferred components. The flat top Picatinny rail accepts optics, iron sights, and accessories directly.

### Key Specifications
- **Condition:** New in Box
- **Finish Color:** Black Hard Coat Anodized
- **Manufacturer:** Spikes Tactical
- **Model:** ST15 Stripped Flat Top Upper Receiver
- **Caliber:** Multi-Caliber Compatible
- **Type:** Uppers (Stripped)
- **Receiver Material:** 7075-T6 Aluminum
- **Sights:** None (Optic Ready)

### Detailed Features
7075-T6 aluminum is a high-strength alloy that keeps weight low without sacrificing rigidity. Hard coat anodize is mil-spec and resists wear and corrosion. The flat top design uses a standard Picatinny rail so any compatible optic or sight mounts without adapters. Multi-caliber compatibility means it accepts upper assemblies in 5.56, .300 Blackout, .224 Valkyrie, and other AR-15-pattern chamberings when paired with the appropriate barrel and bolt.

### Usage Scenarios
- **Custom Builds:** The stripped configuration lets builders choose every component from barrel to handguard.
- **Caliber Conversions:** Swap upper assemblies on a lower receiver to run different calibers from one platform.
- **Competitive Shooting and Tactical Use:** Once assembled, the upper performs across range sessions, matches, and field use depending on the configuration.

## Frequently Asked Questions

**Q: Who makes the ST15 Stripped Flat Top Upper Receiver?**

A: The ST15 Stripped Flat Top Upper Receiver is made by Spikes Tactical.

**Q: What type of part is the ST15 Stripped Flat Top Upper Receiver?**

A: It is a stripped AR-15-pattern flat top upper receiver, no barrel, bolt, or sights are included.

**Q: What caliber is the ST15 Stripped Flat Top Upper Receiver compatible with?**

A: It is multi-caliber compatible, accepting upper assemblies in various AR-15-pattern chamberings when paired with the appropriate barrel and bolt.

**Q: What material is the ST15 Stripped Flat Top Upper Receiver made from?**

A: It is machined from 7075-T6 aluminum with a black hard coat anodize finish.

**Q: Is the ST15 Stripped Flat Top Upper Receiver optic-ready?**

A: Yes. It has a flat top Picatinny rail with no sights installed, so any compatible optic or iron sight mounts directly.

**Q: Where can I buy the ST15 Stripped Flat Top Upper Receiver?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners who have built on the Spike's Tactical ST15 stripped upper tend to be satisfied with the quality.

Build quality and the hard coat anodize finish are the most consistently praised attributes. The 7075-T6 construction handles wear without issues, and the Mil-Spec dimensions mean parts from other manufacturers generally fit correctly. Multi-caliber compatibility gets positive attention from shooters who run multiple barrel assemblies on one lower.

The main friction points come from compatibility with certain aftermarket components. A few builders note fitment issues with specific handguards or gas blocks, which is common across AR-pattern uppers and not specific to Spike's. Weight rarely comes up as a concern since the aluminum construction is on par with similar uppers.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Grabagun Com | $109.99 |

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