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  • Length: 7.75" - 10.75"
  • Weight: 14.5 oz
  • Mount Function: Folding - Right- Canted
  • Mount Height: 2.62"
  • Mount Width: 1.24"


This is the Haga Defense B&T MBT Stock made for mounting to 1913/picatinny rails but with some extras to make it work better with the SIG MCX and Spear LT.

Kit includes a nylon plug that will fill the void left between the stock and the grip and a SIG Low Profile Deflector which will allow the stock to fold completely. It will otherwise be blocked from folding by the factory deflector/forward assist. Your rifle will no longer have a forward assist with this option. 

WARNING: When the stock is locked in the folded position, lift the stock upward on the hinge to unlock it before unfolding. Failure to do so can result in damage to the hinge. Haga Defense will not accept returns due to damaged hinges. 


  • 6061 Aluminum adapter - Hard coat anodized 
  • 8 position length adjustment
  • Telescoping cheek riser w/ 3 position height adjustment
  • Folds to the right canted downward 3.5 degrees
  • Locks folded
  • Fires folded
  • 4 QD sling mount options
  • Available in Black or Coyote Tan

Stock: Made in Switzerland
Adapter: Made in the USA

NOTICE: Raising the cheek riser will block the charging handle from functioning. If you need to raise the cheek riser it will need to be lowered or the stock folded to operate the charging handle. Cheek riser is quickly and easily be adjusted with one hand. 

CAUTION: Many States and localities regulate the use and/or possession of collapsible and folding stocks. Use, or possession of this product in conjunction with certain other parts, may be illegal in some jurisdictions. It is YOUR responsibility to insure your use of this product is in compliance with all Federal, State and local laws and regulations. This is NOT a pistol brace.


Curious about how B&T's "Coyote Tan" looks compared to your standard "FDE"? See the image below. The "Coyote Tan" MBT stock is shown next to parts colored in "Magpul FDE". As you can see the Coyote Tan is a little lighter than FDE and may not be a perfect match to other FDE components if that's what you're hoping for.