Aim Sports G.I. Style Stock — Black Synthetic Body, Mil-Spec Buffer Tube, AR-Platform (Model USASM4STK • UPC 815879017529)
Upgrade your AR-platform rifle with the Aim Sports G.I. Style Body Stock (USASM4STK) — a rugged, lightweight, and reliable mil-spec adjustable stock designed for shooters who demand tactical functionality and comfort. With its black synthetic construction, Mil-Spec buffer tube, and classic M4 carbine styling, this stock delivers proven performance and ergonomic handling for a wide range of AR builds and shooting applications.
Whether you’re building a new rifle, upgrading an existing AR-15, or looking for a dependable replacement stock, the Aim Sports G.I. Style Stock is a perfect balance of affordability, durability, and military-inspired design.
Classic G.I. Style Design for Modern AR Builds
The Aim Sports USASM4STK captures the traditional look and feel of the M4 carbine stock — a staple design trusted by professionals for decades. This stock offers the same practical profile and streamlined shape, allowing quick shoulder transitions, smooth cheek welds, and compatibility with most shooting positions.
Its G.I. design makes it an excellent choice for both tactical and civilian applications, combining heritage-inspired looks with modern materials for enhanced performance.
Durable Synthetic Body Construction
Built to endure field use and heavy-duty range sessions, the stock’s high-strength synthetic polymer body resists impact, moisture, and extreme temperatures. The black matte finish minimizes glare while maintaining a sleek, tactical appearance. This resilient construction ensures long-lasting performance and reliability, even in rugged conditions.
The polymer design also keeps weight low — improving rifle handling and balance without compromising strength.
Mil-Spec Buffer Tube for Reliable Fit
The included Mil-Spec diameter buffer tube ensures a precise and secure fit on AR-platform lowers built to Mil-Spec standards. It provides smooth and consistent adjustment across multiple positions, allowing you to fine-tune your length of pull for optimal comfort and control.
This adjustable stock adapts to different shooting environments, body types, and gear setups — whether you’re wearing body armor, shooting from prone, or running drills at the range.
Comfort, Control, and Functionality
The Aim Sports G.I. Style Stock offers an ergonomic shoulder profile for a solid, comfortable hold during sustained shooting. Its slim body provides excellent maneuverability in confined spaces, while the textured finish enhances grip and control.
A sling attachment slot accommodates various sling configurations, offering flexibility for both tactical and sporting setups. The easy-to-adjust design allows quick changes in stock position on the fly — perfect for shooters who switch between close-quarters and long-range engagements.
Key Features & Specifications
Model: USASM4STK
UPC: 815879017529
Platform Compatibility: AR-15 / M4 / M16 (Mil-Spec)
Material: High-strength synthetic polymer
Color: Black
Style: G.I.-inspired M4 carbine stock
Buffer Tube: Mil-Spec diameter (included)
Adjustment: Multi-position, quick-adjust design
Weight: Lightweight yet durable construction
Sling Mount: Integrated slot for sling attachment
Finish: Non-reflective matte black for a tactical look
Benefits
Proven G.I. Profile: Classic M4-style shape trusted for decades by military and civilian shooters.
Rugged Durability: High-strength polymer body resists impacts, scratches, and weather.
Mil-Spec Fit: Ensures compatibility and secure lock-up with most standard AR-platform lowers.
Enhanced Ergonomics: Comfortable cheek weld, smooth shoulder transitions, and balanced weight distribution.
Adjustable Versatility: Multi-position settings for a custom fit to shooter and scenario.
Simple Installation: Fits Mil-Spec buffer assemblies with minimal tools or modifications.
Ideal For:
AR-15 and M4 Builders: Reliable stock upgrade or replacement for tactical and sporting builds.
Tactical Operators: Lightweight, mission-ready design for fast handling and adaptability.
Range Enthusiasts & Trainers: Durable and affordable option for frequent use and drills.
Hunters & Outdoor Shooters: Weather-resistant stock suitable for field conditions.
Installation & Maintenance
Installation is quick and straightforward — simply slide the stock onto the Mil-Spec buffer tube and lock it into position. Always verify proper engagement before use. To maintain performance, periodically inspect adjustment points and clean with mild solvent or cloth to remove dust and debris. Avoid using harsh chemicals that could affect polymer integrity.
Why Choose Aim Sports?
Aim Sports Inc. is known for delivering affordable, high-quality firearm accessories designed for shooters who value functionality and reliability. Every Aim Sports product is built with attention to detail and field-tested to ensure real-world performance. The G.I. Style Stock (USASM4STK) exemplifies this standard — a dependable, Mil-Spec stock ready to serve shooters across tactical, hunting, and competition environments.
Summary
The Aim Sports G.I. Style Body — Black Synthetic with Mil-Spec Buffer Tube for AR-Platform Rifles (Model USASM4STK, UPC 815879017529) combines military-inspired design, modern materials, and affordable performance in one durable package. With its adjustable configuration, ergonomic feel, and Mil-Spec fit, this stock is the ideal upgrade for AR builders, shooters, and professionals looking to enhance their rifle’s versatility and comfort.
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