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B&T MBT Stock with Haga Defense aluminum adapter for mounting to 1913 rails/endcaps.

Worry free mount fits rock solid without locking tabs allowing for infinite height adjustment so that you can get the stock looking just how you want it no matter what platform you're using.

This stock assembly is roughly 2.5/8" tall where it meets the back of the firearm. Using it on firearms with shorter backends may look silly so measure first! Some examples of firearms NOT to use this on: SIG MPX/MCX, Ruger PC Charger, B&T GHM9, etc. Measure first!

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. 


  • 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 with most platforms
  • 4 QD sling mount options


  • 6061 Aluminum adapter - Hard coat anodized 
  • Total weight: 14.3oz
  • Length collapsed: *7.75"
  • Length Extended: *10.75"

*Length measured from back of the rail on your gun straight back to the back of the buttpad.

Stock: Made in Switzerland
Adapter: Made in the USA

Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are responsible for knowing and following your local/state/federal laws!