Current Stock:
Adding to cart… The item has been added

Since 2011, B5 Systems has manufactured the Crane NSWC designed SOPMOD buttstock for the US Department of Defense. B5 is proud to offer the same stock to the public. The SOPMOD features color matched steel hardware, no slip cushioned buttpad, and dual water resistant storage compartments. The SOPMOD is made of Mil-Spec materials and finishes. Proudly made in the USA.


  • Ergonomic cheek weld
  • Color matched steel hardware
  • Dual water resistant storage compartments
  • Fixed sling mounts 
  • Cushioned non-slip buttpad with built in M4 Multitasker® tool holder
  • Sure grip stock latch
  • Made of MIL-SPEC materials and finishes
  • Fits MIL-SPEC carbine receiver extensions
  • Available in all Black and Coyote Brown
  • Made in the USA


  • Weight: 11.8 oz
  • Length: 7.43 in
  • Width: 2.4 in
  • Height: 4.93 in

NSN: 1005-01-544-9825

* Prop. 65 California Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.