The LaRue MBT-2S (“Best-Good-Trigger, 2 Stage” in the jargon “Best Battery Trigger”) is a two-stage replacement trigger for AR-15 and AR-10 rifles, manufactured by LaRue Tactical in Leander, Texas. Recognized in the American sports and tactical shooting world, it has established itself as the benchmark for the best value for money in the category of two-stage drop-in triggers.
History and Development of the LaRue MBT-2S
LaRue Tactical, founded by Mark LaRue, is a Texas-based company specializing in the manufacture of precision optical fixtures (LaRue QD), AR-15/AR-10 parts, and high-end complete rifles like the PredatAR. The brand has built a reputation for CNC machining with exceptional precision and impeccable after-sales service.
The MBT-2S was born out of LaRue’s desire to offer shooters a military-grade two-stage trigger at an affordable price, when most equivalent competing products cost two to three times as much. The project was developed in-house, based on the brand’s experience in machining critical parts and feedback from professional and competitive shooters. Launched in the 2010s, the MBT-2S was immediately acclaimed by the AR-15 community, to the point of becoming the recommended reference trigger for budget and mid-range builds.
Technical Specifications
| Feature | Specification |
|---|---|
| Official designation | LaRue MBT-2S Two-Stage Trigger |
| Country of Origin | United States (Leander, Texas) |
| Manufacturer | LaRue Tactical |
| Target Platform | AR-15 (5.56 NATO / .223 Rem) and AR-10 (.308 Win) |
| Two-stage trigger type | , traditional components (non-drop-in) |
| First Stroke Weight | Approximately 2.5 lbs (~1.13 kg) |
| Second Stroke Weight (Break) | About 2 lbs (~0.9 kg) |
| Approximate total cumulative weight | Approximately 4.5 lbs (~2 kg) |
| Hammer and trigger material | Heat-treated S7 tooled steel |
| Matte | Black QPQ Nitrocarburized Finish |
| Trigger Shank Type | Standard Curved |
| Pins Included | AR-15 mil-spec standard (.154″) pins |
| Compatibility | All standard AR-15/AR-10 lower receivers |
| Warranty | Manufacturer’s Limited Warranty |
Operation and Technical Particularities
In contrast to self-contained drop-in triggers (Timney, CMC), the MBT-2S is a trigger with traditional components : the hammer, trigger, sear and their springs are supplied separately and are installed directly in the lower receiver on the intended axes. This design has several advantages: no additional housing consumes height in the receiver, production costs are reduced, and components can be individually inspected and lubricated. The installation is still accessible to any experienced shooter, but requires slightly more care than for a drop-in cassette.
The two-stage operation offers a smooth, linear first time of approximately 2.5 lbs, which brings relaxation to a hard, clearly defined wall. The second time, lighter (~2 lbs), allows the trigger with a clean and constant break. The cumulative weight of approximately 4.5 lbs makes it a perfectly usable trigger for serious tactical uses, while offering superior accuracy to an original Mil-Spec trigger. Components made of nitrided S7 steel ensure excellent durability and corrosion resistance.
Variants and Versions
LaRue offers several versions of the MBT-2S to cover different needs. The standard version with curved tail is the best-selling and most versatile. The MBT-2S Flat features the more modern ergonomics of a flat trigger tail popular with PRS and 3-Gun competitors. A 9mm MBT-2S variant was developed for AR-15s chambered in 9mm Parabellum (PCC), with a reinforced hammer suitable for blowback kinematics. LaRue also sells optional spring replacement kits to slightly adjust the trigger weight according to the shooter’s preferences.
Users and Areas of Application
The MBT-2S is massively used in the American civilian community on AR-15 and AR-10 rifles intended for sport shooting (3-Gun, PRS beginner, High Power), varmint hunting and recreational tactical shooting. Several U.S. police units and private contractors have also adopted it on their service rifles because of its reliability, reasonable trigger weight, and unbeatable value for money. Many gunnery schools and instructors recommend it as the first upgrade to an AR-15 mil-spec.
Civil Possession in Switzerland
In Switzerland, the LaRue MBT-2S is available from gunsmiths specializing in AR-15 and AR-10 accessories. The trigger is an internal component and is not considered a weapon within the meaning of the Federal Weapons Act (LArm): its acquisition therefore does not require a specific permit. It is intended to be installed on a military-looking semi-automatic rifle, the purchase of which requires an exceptional cantonal authorisation since the revision of the LArm in 2019, except for licensed sports shooters, collectors or professionals with adequate justification. Installation by an approved gunsmith remains recommended to ensure the conformity and proper functioning of the weapon.
Conclusion
The LaRue MBT-2S is probably the best compromise on the market between quality, reliability and price in the category of two-stage triggers for AR-15 and AR-10. Benefiting from the CNC know-how of a recognized Texas manufacturer, it offers performance close to high-end references at a significantly lower cost. For those who want to replace an original mil-spec trigger without investing in a premium drop-in cassette, it is a reference choice and an immediately noticeable improvement on shooting accuracy and comfort.
