FAB Defense GL-Shock Buttstock — Black Polymer with Anti-Rattle Mechanism for M16 / M4 (Model FXGLSHOCK / UPC 7290105940704)

Upgrade your rifle’s comfort, controllability, and durability with the FAB Defense GL-Shock Buttstock — a rugged, feature-rich stock engineered for M16/M4 platform rifles. Built from reinforced polymer and packed with shooter-focused ergonomics, the GL-Shock combines an advanced anti-rattle mounting system, shock-absorbing geometry, and ambidextrous sling options to deliver a stable, quiet, and repeatable shoulder interface for duty, competition, and recreational use.

Whether you’re a tactical operator, competitive shooter, or weekend enthusiast, the GL-Shock provides a mission-ready balance of low weight, high strength, and premium features that make your rifle more comfortable and controllable across long days on the range or in the field.

Engineered for Control — Key Features & Benefits

• Model / UPC: FXGLSHOCK — 7290105940704

• Platform Compatibility: Designed for M16 / M4 style rifles; compatible with standard Mil-Spec and many commercial receiver extensions (verify fit with your buffer tube).

• Material: High-strength reinforced polymer — impact resistant, corrosion proof, and lightweight.

• Anti-Rattle Mechanism: Integrated locking/anti-rattle interface that clamps securely to the buffer tube to eliminate wobble and unwanted movement — delivers a tight, repeatable cheek weld for improved accuracy and reduced distraction.

• Shock Absorption: Built-in recoil-dampening geometry and a rubberized buttpad reduce felt recoil and shoulder fatigue during prolonged shooting sessions.

• Adjustable Length of Pull: Multi-position length adjustment gives shooters fast, tactile control over LOP for body-armor, kit, or personal preference.

• Ergonomic Cheek Weld: Low-profile, comfortable cheek rest designed to align with optics and improve target acquisition.

• Ambidextrous Sling Options: Multiple sling attachment points, including QD sockets and sling loop slots, support a wide range of carry styles and quick transitions.

• Anti-Slip Buttpad: Textured, rubber buttpad improves contact and prevents slippage under wet or dynamic conditions.

• Low-Profile, Non-Reflective Finish: Matte black polymer for a tactical appearance with minimal glare.

• Easy Installation: Drop-in replacement for most buffer tubes (see manufacturer fitment notes); installs quickly with common hand tools and maintains a secure lock without permanent modification.

Why the GL-Shock Is a Smart Upgrade

A quality buttstock affects every shot and every mile carried. The GL-Shock focuses on three shooter pain points — noise/wobble, recoil, and adaptability — and solves them with thoughtful engineering:

• Noise & Rattle Reduction: The anti-rattle mechanism tightens the stock to the receiver extension so your rifle remains quiet and stable during movement.

• Improved Recoil Management: The shock-absorbing geometry and rubber buttpad reduce impulse transmitted to the shoulder, improving follow-up shot speed and comfort during long strings of fire.

• Versatile Fit: Adjustable length and multiple sling mounting options let users quickly configure the rifle for armor, optics, or carry methods without sacrificing a solid cheek weld.

These traits make the GL-Shock ideal for professionals who depend on consistent rifle behavior, as well as sport shooters who want repeatable ergonomics for competitive stages.

Design & Durability

FAB Defense designed the GL-Shock to survive demanding conditions. Reinforced polymer withstands impacts, temperature swings, and everyday wear without cracking or deforming. The internal anti-rattle hardware is engineered for repeatable clamping force, resisting loosening under recoil and vibration. Surface texturing and rubber components maintain grip and comfort while resisting abrasion and solvents commonly used for firearm maintenance.

Installation & User Guidance (High-Level)

• Compatibility check: Confirm your rifle uses a standard M16/M4-style buffer tube (Mil-Spec or commercial) and compare with FAB Defense fitment notes.

• Drop-in Replacement: The GL-Shock is intended as a user-installable, drop-in buttstock; use common hand tools and follow the manufacturer’s torque and installation guidance.

• Adjustment: Set the length of pull and check cheek weld with your preferred optic and shooting stance.

• Maintenance: Keep the clamp surfaces clean and periodically verify the anti-rattle mechanism remains tight; treat polymer surfaces with standard firearm cleaning products per FAB Defense recommendations.

Note: This description provides general guidance only. For detailed installation steps, torque specifications, or disassembly procedures, refer to the manufacturer’s manual or a certified armorer.

Ideal Use Cases

• Tactical & Duty Rifles: Durable, low-profile design with fast sling integration for operational readiness.

• Competition Shooting: Quick adjustment, anti-rattle stability, and recoil mitigation that shave time and improve follow-ups.

• Hunting & Outdoors: Lightweight construction keeps carries comfortable while providing a dependable shoulder interface.

• Recreational Range Use: Enhanced comfort and repeatable fit for training and extended range sessions.

Technical Specifications (At-A-Glance)

• Manufacturer: FAB Defense

• Model: GL-Shock Buttstock (FXGLSHOCK)

• UPC: 7290105940704

• Color / Finish: Black matte polymer

• Material: Reinforced polymer with rubber buttpad

• Compatibility: M16 / M4 buffer tubes (Mil-Spec and many commercial) — confirm before purchase

• Features: Anti-rattle mechanism, adjustable LOP, ambidextrous sling mounts, shock-absorbing buttpad, ergonomic cheek weld

• Weight: Lightweight (varies slightly by configuration)

• Installation: Drop-in (manufacturer instructions recommended)

SEO-Friendly Product Summary

The FAB Defense GL-Shock Buttstock (FXGLSHOCK) is a heavy-duty, lightweight black polymer buttstock designed for M16 / M4 platforms. Featuring an integrated anti-rattle mechanism, shock-absorbing geometry, adjustable length of pull, and ambidextrous sling mounts, the GL-Shock improves comfort, reduces felt recoil, and eliminates stock wobble for consistent aiming and repeatable performance. Ideal for tactical, competition, hunting, and recreational shooters. UPC: 7290105940704.

Engineered for shooters who demand quiet stability, ergonomic comfort, and durable construction — the FAB Defense GL-Shock Buttstock turns a great rifle into a better one.

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