B5 Systems Government Issue SOPMOD Stock Collapsible Mil-Spec Black
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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
B5 Systems Government Issue SOPMOD Stock Collapsible Mil-Spec Black
Available Merchants(6)
Prices checked
Price Alert
November 2026 so far on GunPartPicker
B5 Systems Government Issue SOPMOD Stock Collapsible Mil-Spec Black is the fifth most added stock on GunPartPicker so far in November 2026, behind the Magpul AR-15 CTR Stock Collapsible Mil-Spec Black, with about 4% of all stocks and braces added to builds. That's its 2nd straight month at #5. Builds with this stock are mostly chambered in 5.56 NATO (84%), mostly on mid-length gas (61%, then carbine-length 29%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 3 of the 6 retailers we track have it in stock. Prices barely moved in October 2026, holding around $95, with no real sale all month. Buying today, the lowest price is $95 at Brownells, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by hundreds of builds that include this one
LMT MARS-L Ambidextrous AR-15 Stripped Lower Receiver
Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger .154"
LMT Upper Receiver Assembly - AR-15 - M4 - Black Anodize
B5 Systems Type 22 P-Grip - Black
Radian Raptor Slim Line Ambidextrous AR-15 Charging Handle - Black
Bravo Company M16 Bolt Carrier Group Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the B5 Systems Government Issue Sopmod Stock Collapsible Mil-Spec Blk
| Build | Parts | Total |
|---|---|---|
 | 13 | $3554.51 |
 | 19 | $1199.71 |
 | 21 | $2575.07 |
 | 20 | $2350.83 |
 | 27 | $3010.28 |
 | 27 | $4107.21 |
 | 20 | $3615.12 |
 | 27 | $2133.58 |
 | 19 | $2149.42 |
 | 20 | $6787.73 |
 | 21 | $2998.97 |
 | 21 | $3048.49 |
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