Sota Arms AR-10/LR-308 Rifle Lower Build Kit, SOPMOD Style Collapsible Stock

Sota Arms AR-10/LR-308 Rifle Lower Build Kit, SOPMOD Style Collapsible Stock

This is a complete lower build kit for AR-10 and LR-308 platforms. It includes everything you need to finish a stripped lower receiver except the serialized receiver itself. The kit pairs a mil-spec heavy-duty buffer tube with a SOPMOD style collapsible stock, mil-spec A2 grip, and a full lower parts kit. All components are USA-made or mil-spec sourced for durability and reliability.

Key Features

• Sota Arms AR-10/LR-308 lower receiver, DPMS spec, black anodized finish
• LR-308 mil-spec lower parts kit with trigger, hammer, disconnector, and selector
• Mil-spec A2 grip, black
• Mil-spec heavy-duty 6-position carbine buffer tube
• 3.7 oz carbine buffer with extra-power spring by Spring Dynamics
• SOPMOD style collapsible stock with storage compartments
• US Tactical mil-spec receiver end plate, phosphate finish
• Mil-spec castle nut, black
• USA-made serialized receiver

Perfect For

• Builders constructing a first AR-10 or LR-308 rifle
• Shooters upgrading from an AR-15 to a larger caliber platform
• Those seeking a complete lower assembly with mil-spec components
• Shooters who prefer adjustable stock configurations

Adjustable Length of Pull

The SOPMOD style collapsible stock offers six positions, allowing you to adjust the length of pull to fit your body size and shooting style. The stock is constructed from nylon reinforced polymer for durability while keeping weight down. Storage compartments in the stock provide space for small parts or accessories.

Mil-Spec Heavy-Duty Buffer System

This kit uses a mil-spec heavy-duty carbine buffer tube paired with a 3.7 oz carbine buffer. The buffer spring is chrome-silicon, moly-plated, and stress-relieved for consistent cycling. This combination is designed to handle the recoil impulse of AR-10/LR-308 cartridges reliably.

USA-Made Lower Receiver

The. Sota. Arms lower receiver is DPMS spec, anodized black, and manufactured in the USA. It arrives serialized and ready for your lower parts kit installation. The receiver is built to mil-spec tolerances for compatibility with standard AR-10 upper assemblies.

Complete Lower Parts Kit Included

The LR-308 mil-spec lower parts kit includes all internal components needed to complete the lower receiver: trigger group, hammer, disconnector, selector, magazine catch, bolt catch, and all required pins and springs. No additional parts are needed to finish the lower assembly.

Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.