Spike's Tactical

Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black

All Spike's Tactical lower receivers
Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black - Lower Receiver for AR-15 - view 1
Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black - Lower Receiver for AR-15 - view 2
Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black - Lower Receiver for AR-15 - view 3
Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black - Lower Receiver for AR-15 - view 4
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Spike's Tactical

Overview

The Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower is a forged lower receiver designed for the AR-15 platform, made from durable 7075-T6 aluminum. This stripped lower features a trigger pin size of .154, making it compatible with a wide range of trigger options, and it is optimized for calibers such as 5.56 NATO and .223 Wylde. Builders often choose this lower for versatile setups that require reliable performance in various shooting scenarios.

Specifications

MPN9364
PlatformAR-15
Caliber5.56 NATO
AssemblyStripped
StyleForged
ColorBlack
Material7075-T6 Aluminum
Trigger Pin.154

Available Merchants(1)

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~$9.99 est. shipping
Shipping Speed
Out of Stock
$107.10
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Build history on GunPartPicker

Builders have added the Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black to their builds on GunPartPicker. Since April 2026, it ranks #305 of the 1,222 lower receivers builders have added. Builds with this lower receiver are mostly chambered in 5.56 NATO (80%, then .223 Wylde 13%), mostly on mid-length gas (63%, then carbine-length 25%), and nearly all AR-15.

It was out of stock everywhere we track every time we checked in October 2026, and today the one retailer we track is out of stock. Listed prices start at $107.10 at AR15 Discounts for when it comes back.

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Frequently Built With

The part most often added in each category by the builds that include this one

CMMG AR-15 Mil-Spec Trigger KIT

CMMG AR-15 Mil-Spec Trigger KIT

Trigger$31in 9% of them
Timber Creek Enforcer AR Pistol Grip, Black - E ARPG Black

Timber Creek Enforcer AR Pistol Grip, Black - E ARPG Black

Pistol Grip$80in 6% of them
Timber Creek Outdoors Ambidextrous Safety Selector - Black

Timber Creek Outdoors Ambidextrous Safety Selector - Black

Safety$20in 9% of them
LBE Unlimited AR-15 Magazine Catch Assembly, Black - ARMCASY

LBE Unlimited AR-15 Magazine Catch Assembly, Black - ARMCASY

Magazine Release$4in 6% of them
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B

CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B

Takedown Pin$16in 12% of them
Strike Industries Cobra Billet Aluminum Trigger Guard - Red

Strike Industries Cobra Billet Aluminum Trigger Guard - Red

Trigger Guard$30in 9% of them

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Caliber

80%
5.56 NATO80%
.223 Wylde13.3%
300 Blackout6.7%

Gas System

62.5%
Mid-Length62.5%
Carbine25%
Pistol12.5%

Builds Featuring This Part

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Builds in the community that include the Spike's Tactical STLS018 Spider Fire/Safe Stripped Lower 223 Rem 556NATO - Black

BuildPartsTotal
New build build
New build		18$1394.64

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