Product Description
The Haga Defense SIG MCX Spear LT MBT Stock System integrates the premium B&T MBT folding stock with a custom aluminum adapter designed specifically for mounting to 1913/Picatinny rails. This kit includes a nylon plug to fill the gap between the stock and grip, and a SIG Low Profile Deflector to allow complete folding (replaces the factory deflector/forward assist, removing forward assist function). Available in Black or Coyote Tan.
Specifications
- Stock Length: 7.75" – 10.75"
- Weight: 14.5 oz
- Mount Height: 2.62"
- Mount Width: 1.24"
- Length of Pull Adjustment: 8 positions
- Telescoping cheek riser with 3-position height adjustment
- Folds to the right, canted downward 3.5 degrees
- Fires folded
- 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 adapter, nylon plug, SIG Low Profile Deflector, mounting hardware
- Made in: USA (adapter); Stock manufactured by B&T (Switzerland)
Compatibility and Installation Notes
- Compatible exclusively with SIG MCX Spear LT rifles (will not fit larger caliber Spear models)
- Mounts to 1913/Picatinny rails
- 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.
- NOTICE: Raising the cheek riser will block the charging handle from functioning. Lower the cheek riser or fold the stock to operate the charging handle.
- 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
1 Review Hide Reviews Show Reviews
-
One of the most aesthetically pleasing stock/adapters available for the Spear LT
Someone has always never looked right with skeleton stocks to me honestly. I've always wanted something that could replicate a similar look to the SCAR Ugg Boot or classic ACR stock while still being able to fold. Not only does this do the job, it looks amazing while doing so. The positives like having adjustments while being able to fold outweigh most of the cons. You do have to replace the deflector with a low profile one but no one really uses their forward assist honestly. You just remove two hex screws and a roll pin and transfer it over. Easy as that. Lockup is solid on the custom adapter and the nylon plug fixes the gap issue with just only having the stock as the 1913 plug on the MCX is shorter than the adapter. Pros - Aesthetically pleasing. Skeleton stocks don't do it for me and this is by far on the top of my list of best looking aesthetics with the Spear LT. - The stock allows for great length adjustments while still being thin enough to be folded flat against the rifle unlike traditional stocks. - There is absolutely no wobbling or play when the stock in unfolded. Durable and rugged feeling that you feel like you could trust. Firing the rifle with the MBT feels good and there's no issue with lack of cheek weld. - Just a personal thing but I love when FDE (the stock is Coyote Tan) never matches. It's very difficult to color match consistently from batch to batch and even more so with different materials. It's very similar to BCM's FDE and similar to B5's FDE. Cons (most cons are already addressed on the product page and 99% of these are non-issues personally) - Genuinely wished the stock would be able to be thrown open from the folded position but it's not that big of a deal. I'm sure you could with enough force but the stock/adapter doesn't feel like it was naturally intended to move that way and risk of damage is possible real. - The cheek riser issue is also mentioned in the description when using it on the Spear LT/similar AR180 like platforms. - There is a bit of wobbling/play in the stock when folded.
