Strike Industries Viper Modular Fixed Stock, Black - SI-VIPER-MFS-BK

Strike Industries Viper Modular Fixed Stock, Black - SI-VIPER-MFS-BK - Stock & Brace for AR-15 - view 1
Strike Industries Viper Modular Fixed Stock, Black - SI-VIPER-MFS-BK - Stock & Brace for AR-15 - view 2
Strike Industries Viper Modular Fixed Stock, Black - SI-VIPER-MFS-BK - Stock & Brace for AR-15 - view 3
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Strike Industries

Overview

The Strike Industries Viper Modular Fixed Stock is a black stock designed for enhanced stability and comfort on your AR-15 build. As a fixed stock, it provides a solid platform that eliminates any play, which is particularly beneficial for precision shooting and maintaining consistent cheek weld. This stock is often found on mid-length gas system builds chambered in 5.56 NATO, making it a practical choice for those looking to optimize their rifle's performance.

Specifications

MPNSI-STRIKE-MFS-BK
ColorBlack
Stock TypeFixed

Available Merchants(7)

Prices checked

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Primary Arms logo
Primary Arms
Free shipping over $99
Shipping Speed
In Stock
$48
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
Shipping Speed
In Stock
$48
KY Gun Company logo
KY Gun Company
Flat rate shipping
Shipping Speed
In Stock
$50
Optics Planet logo
Optics Planet
Free shipping
Shipping Speed
In Stock
$54
Brownells logo
Brownells
Free shipping over $99
Shipping Speed
In Stock
$59
SO
Sportsmans Outdoor Superstore
Flat rate shipping
Shipping Speed
Out of Stock
$43
Ammunition Depot logo
Ammunition Depot
~$28.90 est. shipping
Shipping Speed
Out of Stock
$54

Build history on GunPartPicker

Builders have been adding the Strike Industries Viper Modular Fixed Stock, Black - SI-VIPER-MFS-BK to their builds on GunPartPicker since February 2026. All time, it ranks #265 of the 431 stocks and braces builders have added.

Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 5 of the 7 retailers we track have it in stock. The best price crept up from $41.17 to $49.52 over August 2026. Buying today, the lowest price is $47.95 at Primary Arms, above August's low of $41.17, so a better deal may come back.

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