MDT LSS Gen3 Chassis Base, Ruger M77 SA

• Modular Gen3 architecture: The LSS Gen3 uses a central chassis base with interchangeable forend and buttstock interfaces, so the rifle can be configured for hunting, competition, tactical use, or general range work without replacing the whole chassis.
• Zero-retaining component swaps: The system is built so handguards and buttstock interfaces can be changed without affecting rifle zero, which makes setup changes practical for shooters who use one rifle in more than one role.
• AICS magazine compatibility: Support for AICS-pattern magazines gives the Ruger M77 short action a widely used detachable box magazine standard, simplifying reloads and broadening magazine choice.
• AR-style grip compatibility: The chassis accepts AR-15 style grips, allowing the rifle’s grip angle and feel to be tailored to shooting position, hand size, and intended use.
• Rigid aluminum construction: The aluminum chassis keeps weight to 998.00 g while providing a stable bedding platform that helps the action stay consistent under field use and repeated firing.

About the MDT LSS Series

The MDT LSS Gen3 series is a modular chassis system built around a central action-mating base rather than a fixed one-piece layout. Introduced in 2025, it sits in MDT’s lineup as a flexible platform for shooters who want one rifle to cover competition, hunting, tactical applications, and general shooting. Instead of locking the rifle into a single format, the system lets the user choose the forend and buttstock interface that best suits the job.

A defining trait of the series is that handguards and buttstocks can be changed without affecting zero. In practice, that makes the LSS Gen3 especially useful for shooters who move between supported positional shooting, field carry, and more compact transport setups. The series is also designed around familiar modern rifle ergonomics, with support for AR-style grips and an ambidextrous magazine latch. MDT offers dedicated Competition, Hunting, and Tactical forend options, so the LSS Gen3 family is less about a single fixed chassis and more about a configurable system built around the action.

About the MDT LSS Gen3 Chassis Base, Ruger M77 SA

The MDT LSS Gen3 Chassis Base, Ruger M77 SA adapts the Ruger M77 short action to MDT’s latest modular chassis format. As the core of the system, it provides the action-specific interface while leaving the rifle open to different forend and buttstock choices. That makes it a practical starting point for shooters who want to build a rifle around a defined purpose now, while keeping the option to reconfigure it later for a different discipline.

The chassis is intended for competition, general shooting, hunting, and tactical use, which is reflected in its layout. AICS magazine compatibility brings the rifle onto a common detachable magazine standard that is widely used in precision and practical shooting. AR-15 style grip compatibility lets the shooter tune grip shape and angle to prone work, barricade shooting, or field carry, which has a direct effect on trigger reach and overall control. The non-folding design keeps the package straightforward and rigid, while the aluminium construction helps maintain a stable interface between action and chassis.

At 998.00 g and 322.00 mm in length, this chassis base remains compact enough to serve as the foundation for very different rifle builds. The listed 31.75 mm maximum barrel diameter gives room for heavier barrel profiles often chosen for precision-oriented setups, while the fixed 142.00 mm forend length specification reflects the base’s role as the center section of a broader configurable system rather than a complete one-piece stock.

About MDT

MDT Sporting Goods was established in 2009 and is based in British Columbia, Canada, with roots in Chilliwack. The company focuses on products for precision-oriented rifle shooting, designing and manufacturing rifle chassis systems, magazines, buttstocks, and accessories for target shooting and hunting. Its range also includes bipods, scope bases, and scope rings, giving MDT a broad presence in the rifle support and interface category.

A notable part of MDT’s history is the TAC21, which the company identifies as its first chassis. MDT also states that its chassis, magazines, and accessories are developed with input from competitive precision shooters, which helps explain the brand’s emphasis on modularity, practical ergonomics, and compatibility across different rifle setups. In the chassis market, MDT is particularly known for turning factory bolt-action rifles into more adaptable precision and field platforms.

Main Features

• Manufacturer: MDT
• Series: MDT LSS
• Made in: Canada
• In production since: 2025
• Material: Aluminium
• Weight: 998.00 g
• Length: 322.00 mm
• Min. Forend Length: 142.00 mm
• Max. Forend Length: 142.00 mm
• Max. Barrel Diameter: 31.75 mm
• Foldable: No
• Application: Competition, General, Hunting, Tactical
• Magazine Compatibility: AICS Magazine Compatible
• Grip Compatibility: AR-15 Style Grips, MDT Pistol Grips

Warranty

MDT provides a 2-year warranty for this chassis. That period suits a hard-use rifle component and adds clear long-term support for a modular precision or hunting rifle build.