B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk

B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk - Stock & Brace for AR-15 - view 1
B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk - Stock & Brace for AR-15 - view 2
B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk - Stock & Brace for AR-15 - view 3
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B5 Systems

Overview

The B5 Systems Government Issue Sopmod Stock is a collapsible stock designed for Mil-Spec buffer tubes, providing builders with a reliable and adjustable option for their AR-15 platforms. Made from durable polymer, this stock enhances the overall ergonomics of your setup while allowing for easy length adjustments to accommodate different shooting styles or user preferences. This stock is commonly found in builds featuring a Mid-Length gas system chambered in 5.56 NATO, making it a practical choice for a wide range of applications.

Specifications

MPNSOP-1351
MaterialPolymer
ColorBlack
Tube SpecMil-Spec
Stock TypeCollapsible

Available Merchants(7)

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Sportsmans Outdoor Superstore
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$63
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Palmetto State Armory
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Optics Planet
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Primary Arms
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BattleHawk Armory
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KY Gun Company
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Brownells
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Frequently Built With

Based on build data

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

100%
AR-15100%

Caliber

100%
5.56 NATO100%

Gas System

100%
Mid-Length100%
Frequently Built With Products
ProductCategoryTimes Built Together
Geissele Automatics Llc Ar-15 Ssa-E X Lightning Bow Trigger27
CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B23
B5 Systems Trigger Guard ATG-001-0119
Radian Weapons Talon Ambidextrous Safety Selector 2-Lever Kit - Radian Grey18
Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension13
Bravo Company M16 Bolt Carrier Group Black11
Build Platform Breakdown
PlatformPercentage
AR-15100%
Build Caliber Breakdown
CaliberPercentage
5.56 NATO100%
Build Gas System Breakdown
Gas SystemPercentage
Mid-Length100%

Builds Featuring This Part

See all 13

Builds in the community that include the B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk

BuildPartsTotal
Backup 5.56 build
13$3023.86
PSA 16"
19$1187.86
DMR 20" 5.56
21$2947.26
Aero Precision 12.5"
20$2269.68
hog hunter 14.7" 5.56
27$2947.17
aero precision 12.5" build
27$3972.36
11.5" build
20$3611.62
PDW 16" 5.56
27$2021.94
for the family fun 10.5"
19$2003.53
range 11.5"
20$7114.92
first 5.56 build
21$2604.73
carbine 10.5" 5.56
21$2965.72

Customer reviews

4.5out of 5

2 global ratings

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Top reviews

C
cJCYR6HPENDboHE
B5 SOPMOD stock stiff start
Reviewed on March 29, 2026Verified with Build

B5 SOPMOD stock is the same general profile as the issued LMT SOPMOD. Cheek weld is comfortable. Lock lever was stiff for the first week of adjustments before easing up. Now slides cleanly to each position.

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P
prestonHandsome
B5 SOPMOD QD tight
Reviewed on March 29, 2026Verified with Build

B5 Systems Government Issue SOPMOD stock in black has the QD socket that holds a sling tight under load. Stock locks at each position positively on a milspec tube. Polymer is dense and durable - holds up to abuse. Authentic SOPMOD geometry.

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