Will the LaRue MBT-2S fit my legacy large-pin Colt AR-15 lower receiver?

No, the LaRue MBT-2S is strictly designed for standard mil-spec lower receivers utilizing .154-inch small pins. It is incompatible with legacy large-pin .169-inch Colt lower receivers and cannot be installed without modifying or replacing the lower.

What is the difference between the standard and heavy springs included with the trigger?

The standard spring configuration yields a total pull weight of 4.5 lbs, split evenly with a 2.5 lb first-stage take-up and a crisp 2.0 lb second-stage break. If you prefer a heavier feel for duty use, field hunting in cold weather, or personal preference, installing the included heavy spring increases the total pull weight to approximately 6.0 lbs.

Is this trigger compatible with Australian compliant AR-pattern straight-pull or bolt-action rifles?

Yes, the MBT-2S can be fitted to compliant AR-pattern platforms in Australia, such as Category B straight-pull, pump-action, or bolt-action rifles, provided they utilize standard mil-spec small-pin AR fire control groups. As a purely mechanical firearm component, electrical compliance certifications like SAA/RCM and 240V ratings are not applicable.

What material is the LaRue MBT-2S made from and how does it affect durability in the field?

The hammer and trigger components are precision CNC-machined from solid S7 tool steel, renowned for its exceptional impact resistance and shock absorption. This rugged construction ensures a hyper-consistent break and long-term durability, even under harsh outback hunting conditions and high-round-count competition shooting.

AR15 2-Stage Trigger - LaRue MBT-2S

The LaRue Tactical MBT-2S (Meticulously Built Trigger) is a precision two-stage non-cassette fire control group engineered for standard mil-spec AR-15 and AR-10/LR-308 pattern lower receivers. Precision CNC-machined from solid S7 tool steel, the MBT-2S replaces standard, gritty single-stage triggers with a smooth take-up, a distinct second-stage wall, a crisp break, and a positive tactile reset. The component package includes two interchangeable springs, allowing users to select between a lighter pull for accuracy rigs or a heavier pull for field and duty applications.

Key Features

S7 Tool Steel Construction: Precision CNC-machined hammer, trigger, and disconnector fabricated from shock-absorbing, wear-resistant S7 tool steel.
Two-Stage Operation: Features a smooth first-stage take-up leading to a crisp break with minimal over-travel.
Dual Spring Configurations: Includes a standard light spring offering a 4.5 lb total pull weight (2.5 lb first stage / 2.0 lb second stage) and an alternate heavy spring offering a ~6.0 lb total pull weight.
Curved Bow Interface: Designed with a wide, distinctively squared-off curved face for consistent finger placement and leverage.
Standard Mil-Spec Fitment: Compatible with common .154-inch small-pin receivers across AR-15 and AR-10 platforms.

Specifications

Product Name: LaRue Tactical MBT-2S 2-Stage Trigger
Material: Solid S7 tool steel
Trigger Type: Two-stage component trigger (curved bow)
Standard Pull Weight: 4.5 lbs (2.5 lb first stage / 2.0 lb second stage)
Heavy Spring Pull Weight: ~6.0 lbs
Pin Diameter Compatibility: .154-inch small pin (mil-spec)
Platform Compatibility: AR-15 and AR-10/LR-308 lower receivers (e.g., 5.56 NATO, .223 Rem, .300 AAC Blackout, 6.5 Creedmoor, 7.62x51mm / .308 Win)
Power Requirements: None (100% mechanical)

Who is the LaRue MBT-2S 2-Stage Trigger for?

Precision AR-15 and AR-10 Target Shooters — Requires the LaRue MBT-2S trigger's 4.5 lb standard pull weight (broken into a 2.5 lb take-up and a 2.0 lb break) to deliver consistent trigger control and reduce sight deflection during benchrest and long-range shooting.
Designated Marksman Rifle (DMR) Builders — Benefits from the durable CNC-machined S7 tool steel construction and the option to install the included ~6.0 lb heavy spring for an increased safety margin in rugged field conditions.
Australian Owners of Compliant AR-Pattern Rifles — Utilises the standard .154-inch small-pin interface to drop this two-stage AR trigger directly into Category B compliant straight-pull, pump-action, or bolt-action platforms that accept mil-spec fire control groups.

Less suitable for: Firearm owners with lower receivers utilizing legacy .169-inch large-pin holes, such as older Colt models; these platforms require a dedicated large-pin AR-15 fire control group.

SKU	LAR102106LP
Model #	MBT-2S
Brand	Larue
Shipping Weight	0.2000kg

What our Customers are Saying

We Also Recommend

Sellier & Bellot 300 Winchester Magnum Unprimed Br

$57.95

A-zoom Precision 357 Magnum Metal Snap Caps Solid

$53.95

A-zoom Perfect 45 Acp Striker Snap Caps Centering

Don't pay $22.95 $15.00 34.64% OFF

Grovtec Gtsw07 Machine Screw Fore End Swivel Set 1

$26.95

Recommended Products

Allen Al7254 Ez Mount Trophy Skull Hanger Heavy Du

$77.95

Larue Tactical Lt708-Blk Rail Covers 72 Pack Black

$57.95

Eagleye Camera Weaver Adapter - Smartrest Hyper Po

$33.95

Burris Signature Pos-align Ring Individual Inserts

$20.95

Welcome to Xhunter Australia. By accessing and using our website (www.xhunter.com.au) and purchasing from our online store, you agree to be bound by the following Terms and Conditions. Please read them carefully before proceeding.

1. Eligibility

By agreeing to these Terms and Conditions, you confirm that:

• You are at least 18 years of age.
• You are legally capable of entering into a binding contract under Australian law.
• You will not purchase any restricted or controlled items unless legally permitted to do so.

2. Product Information

• All products listed are subject to availability.
• Product descriptions, specifications, and pricing are subject to change without notice.
• We make every effort to display products accurately, although we do not guarantee that all images or content are error-free.

3. Orders and Payments

• All orders are subject to acceptance and confirmation.
• Prices are in AUD and include GST unless otherwise stated.
• We reserve the right to cancel or refuse any order at our sole discretion.
• Full payment is required before dispatch.

4. Authority to Leave (ATL) and Delivery

• By default, all orders are shipped with Authority to Leave (ATL).
• If you require Signature on Delivery, please contact us prior to purchasing. Additional charges apply.
• If an order is returned to us due to failed delivery or non-receipt when ATL is not permitted, a $25 return processing fee must be paid before reshipment or refund.

5. Returns and Refunds

• Please refer to our full Returns Policy on the website.
• Returned items must be in original, resalable condition unless faulty.
• A restocking fee may apply if an item is not in reselling condition.
• Change-of-mind returns may not be accepted for clearance or custom-ordered items.

6. Firearms and Restricted Items

• You must comply with all relevant State and Federal laws for regulated products.
• You are responsible for ensuring proper licences and permits are held.
• We reserve the right to request proof of eligibility before dispatch.

7. Limitation of Liability

• Xhunter Australia is not liable for direct or indirect losses arising from the use or misuse of products.
• We are not responsible for any unauthorised modifications or incorrect application of products.

8. Manufacturer Warranty Support

Some products sold by Xhunter Australia include a manufacturer’s warranty (for example, limited lifetime warranties). These warranties are provided solely by the manufacturer and are separate from the consumer guarantees under Australian Consumer Law.

Where a manufacturer provides a warranty:

A. The warranty is offered and honoured by the manufacturer, not by Xhunter Australia, unless expressly stated otherwise.
B. Customers may be required to contact the manufacturer directly and comply with their warranty process, which may include overseas product assessment.
C. Proof of purchase is required to lodge a manufacturer warranty claim.
D. Assistance provided by Xhunter Australia in lodging warranty claims is a goodwill service only and does not imply liability for warranty outcomes or decisions.

Nothing in this clause limits your rights under Australian Consumer Law.
Xhunter Australia remains responsible for providing legally required remedies for products that fail to meet the consumer guarantees of acceptable quality, fitness for purpose, and reasonable durability.

9. Privacy

Your personal information is collected, used, and stored in accordance with our Privacy Policy.

10. Intellectual Property

All text, graphics, logos, and images on this website remain the property of Xhunter Australia and are protected by copyright laws.

11. Amendments

We may update or modify these Terms and Conditions at any time without prior notice. Continued use of our site constitutes acceptance of any updated Terms.

12. Governing Law

These Terms and Conditions are governed by the laws of Victoria, Australia. Any disputes will be handled exclusively by the courts of Victoria.

13. 18+ Age Requirement

By placing an order, you confirm that you are at least 18 years of age and legally entitled to purchase the products ordered. We may cancel any order that breaches this requirement.

Larue Mbt-2s 2-Stage Trigger S7 Tool Steel 4.5 Lbs Pull

Secure Payment Methods