Product Description
The Haga Defense B&T MBT Stock System (1913 Interface) allows you to fit the premium B&T MBT folding stock on any gun with a 1913/Picatinny rail at the rear that is 2.62" or taller. The B&T MBT stock features 8-position length adjustment, telescoping cheek riser with 3-position height adjustment and folds to the right.
Specifications
- Length: 7.75" - 10.75"
- Weight: 14.5 oz
- Mount Function: Folding - Right - Canted
- Mount Height: 2.62"
- Mount Width: 1.24"
- Length of Pull Adjustment: 8 positions
- Cheek Riser: Telescoping with 3-position height adjustment
- Folding: To the right, canted downward 3.5 degrees
- Multiple QD sling mount options
- Adapter Material: 6061 aluminum
- Finish: Mil-A-8625 Type III Class 2 hardcoat anodize, black (adapter)
- Colors Available: Black or Coyote Tan
- Included: B&T MBT stock, Haga Defense 1913 adapter, mounting hardware
- Made in: USA (adapter); Stock manufactured by B&T (Switzerland)
Compatibility and Installation Notes
- Mounts to any 1913/Picatinny rail (requires rail height of 2.62" or taller)
- 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.
- 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.
- Color Note: B&T "Coyote Tan" is lighter than standard Magpul FDE and may not perfectly match other FDE components (see image below for comparison).

- No permanent modifications required
Always ensure your firearm configuration complies with all applicable federal, state, and local laws.
Installation Instructions
- Safety First: Before beginning installation, make sure the firearm is completely unloaded, the chamber is empty, and the safety is engaged. Remove the magazine, visually and physically inspect the chamber to confirm it is empty, and point the firearm in a safe direction at all times.
- No further installation instructions available at this time.
Product Videos
Custom Field
Product Reviews
11 Reviews Hide Reviews Show Reviews
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Fits perfectly
I bought this stock for my BRN-180 build to replace a MI folding buffer tube. Initially I was worried that it would not line up with the rail slots on the back of the 180 lower but was happy to see that the screws do not go all the way through the adapter to act as anchors like many other rail attachments. Compared to the old stock there is no wobble at all, It looks great to boot.
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MBT Stock w/ 1913 adapter
Good stock. Solid and not rickity at all. Adapter easily folds and stays snug whether deployed or folded. I would pay an extra $200 - $300 if Palmetto State Armory would offer these stock/adapter combos over the cheap F5 mfg pseudoACR stocks
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High quality product at a fair price.
This folding stock works amazing on the JAKL, way better than the F5 ACR stock clone and that thing isn't cheap either. The Haga MBT adapter is very sturdy and well machined.
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Very nice!
The almost perfect stock for a PSA JAKL I've found. Solid lockup, excellent cheekpiece, & clears ejection port when folded. The only negative is the length adjustment is a tad wonky. 8.7/10 would buy again
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MBT stock for 1913
I ordered this stock for my PSA JAKL late at night and the order was processed first thing the next morning. It was promptly shipped and arrived a couple days later. I sent an email asking if anyone knew anything about a non permanent solution to pinning the stock for CA compliance. Dan himself emailed me back letting me know he hadn’t seen it done yet with this particular stock. He then took the time to help me find the solution. Outstanding customer service. I can honestly say I am impressed with the level of care and support he has provided. Thank you, Dan!
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Great product
10/10 better than expected, would highly recommend
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MBT stock for 1913 rails
Just received this bad boy today. Looks badass on the JAKL.....no surprise. Out of the box, it looks toy-ish but that instantly goes away once you slap it in to the receiver. Super solid when locked back. Telescoping feature is a lil stiff to operate but it's a set-it-and-forget-it adjustment so no big deal there. Better a lil on the stuff side than being loose. Love this thing. Glad I snatched one up before the inventory ran dry.
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B&T MBT STOCK FOR 1913 RAILS
Stock is awesome! It locks solid in both open and closed positions. Matches up perfectly with the PSA Jakl reciever
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5 Star Craftsmanship
You get what you pay for. Amazing fit and finish.