B5 SOPMOD AR-15 Stock – Mil-Spec

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B5 SOPMOD Stock with Battery Storage and QD Sling Mounts

An official pick of the U.S. military, the B5 Systems Enhanced SopMod stocks have helped thousands of soldiers make the most of their skill in the field. From active engagements to shooting off rounds at the range, this stock enhances accuracy, precision, and fit. This stock fits on all mil-spec buffer tubes, and adds two watertight storage tubes for batteries, so you can keep your optics and lights running.

When you aren’t worrying about wobble, slippage, and improper cheek weld, you can focus on what really matters: Taking your performance to the next level. The comfortable, wide cheek weld makes getting on target more stable and comfortable, so you can line up your shots with ease.


  • Ergonomic cheek weld
  • Color-matched steel hardware
  • Overmolded steel anti-rotational QD sling mounts
  • Fixed sling mounts
  • No slip cushioned butt pad
  • Suregrip stock latch
  • Dual storage compartments
  • Made of Milspec materials and finishes
  • Fits all Milspec AR15 receiver extensions


  • Height: 4.90″
  • Length: 7.4″
  • Product Weight: 11.8oz

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Customer Reviews

Based on 7 reviews
Nathan Werner
Great cheek weld / highest quality

This stock is iconic but also very well built. Its wider top and subtle rounding of faces is perfect for a good shooting feel. No burrs or casting marks on any edges of the manufacturing process and QA/QC seems good. They are pricey but you should have at least one AR with this on. If you have only one..... this is what you should have on it.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Jacob Meers

I’ll keep using this stock for my do-it-all AR rifles. Perfect fit for my shoulder and I get the best cheek weld. The heavier weight works for me as it balances my rifle perfectly.

Thank you for your positive feedback on the B5 SOPMOD AR-15 Stock. We are glad to hear that it has been the perfect fit for your do-it-all AR rifles and provides a comfortable and balanced shooting experience. We appreciate your support and hope you continue to enjoy using our product. Happy shooting!

Austin Williams

It’s a little bolky will have to order a new one

Thank you for your feedback on the B5 SOPMOD AR-15 Stock. We apologize for any inconvenience with the size and will definitely take your comment into consideration for future improvements. If you have any further concerns, please don't hesitate to reach out to us. Thank you for choosing our product.

Art Gonzalez
Customer service

I had an address issue and they called me to insure that the information was correct! In short this is a great company, fast shipping, high quality products, and overall GREAT customer service.

Thank you for the kind words! We are glad to have been able to help you with your order.

B5 Systems Sopmod Stock

Absolutely the best stock to use for any AR15 platform. Easy installation and perfect fitment on MilSpec carbine buffer tubes. They actually fit snug with no wobble whatsoever. Another great feature is the cheek weld. They are much wider than other sopmod stocks. Highly recommended if you’re shopping for a stock. And get here at AT3 Tactical with their lightning fast shipping! Thanks AT3. Semper Fi

We're glad to hear that the B5 Systems Sopmod Stock is a great option for use with an AR-15 platform, and we're happy to see that it fits snugly and has no wobble. The cheek weld is also a great feature, making it easier to hold the rifle steady. Thanks for the great review!