White Label AR-15 Lower Build Kit: Mil-Spec LPK, SOPMOD Stock, Buffer Tube & H2 Buffer, BCG + CH

Finish Your Lower Kit: Complete AR-15 Lower Receiver Assembly

Complete lower receiver kit with mil-spec heavy-duty 6-position buffer tube, SOPMOD stock with integrated storage compartments, and 9310 alloy steel bolt carrier group. This kit includes everything needed to finish a stripped lower receiver except the serialized receiver itself. All components are mil-spec quality and compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend platforms.

Key Features

• Complete mil-spec lower parts kit with trigger, hammer, disconnector, and all required springs and pins
• 9310 alloy steel bolt carrier group with nitride finish, full auto compatible design
• Mil-spec heavy-duty 6-position buffer tube, 6061 aluminum with Type II anodized finish
• SOPMOD collapsible stock with dual integrated storage compartments and QD sling mounts
• AR-15 M4 charging handle, mil-spec aluminum with A2 style latch
• US Tactical mil-spec end plate and Recoil Technologies castle nut
• Trinity Force SBA Silent Buffer H2 for reduced recoil impulse

Perfect For

• Builders finishing a stripped lower receiver with mil-spec components
• Shooters building 5.56 NATO or .300 Blackout AR-15 platforms
• Those prioritizing storage and ergonomic stock features
• Builders seeking complete, matched component sets
• Shooters wanting heavy-duty buffer system reliability

Complete Lower Assembly Components

This kit provides all primary components required to complete a lower receiver build. The lower parts kit handles trigger function and internal operation, while the buffer tube assembly, stock, and bolt carrier group manage cycling and control. The charging handle enables bolt manipulation, and the end plate and castle nut secure the buffer tube assembly. All components are mil-spec rated for standard AR-15 platforms.

SOPMOD Stock with Storage Design

The. Gauntlet. Arms SOPMOD collapsible stock features nylon-reinforced polymer construction with dual integrated storage compartments built into the stock body. The design includes quick-detach sling mounts for tactical accessories. The 6-position adjustment allows customization for different shooting positions and body types without requiring tools.

Multi-Caliber Bolt Carrier Group Compatibility

The 9310 alloy steel bolt carrier group is rated for 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend platforms. The nitride finish provides corrosion resistance and durability across extended shooting sessions. Full auto compatible design means the bolt carrier group functions reliably whether used in semi-automatic or full-automatic platforms, though operation remains semi-automatic in civilian AR-15 lower receivers.

Heavy-Duty Buffer System Engineering

The mil-spec 6-position buffer tube uses 6061 aluminum construction with. Type II anodized black finish for durability. The 1.145 inch outer diameter and 1 inch inner diameter provide standard AR-15 compatibility. The. Trinity. Force SBA Silent. Buffer H2 reduces felt recoil impulse compared to standard buffers, improving control during rapid fire sequences.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. BCG and charging handle are included with this kit.