Fierce Firearms Chassis Kit — Black | Fits AR-15 Short-Action* | Model SACHSBL | UPC 853418803929
Give your rifle a purpose-built precision backbone. The Fierce Firearms Chassis Kit in Black (SACHSBL) converts an AR-15–size build into a rigid, adjustable, and fully modular platform ready for hunting, steel, or long-range training. With a rock-solid bedding interface, M-LOK® forend slots, and an ergonomically tunable stock section, this chassis helps you achieve repeatable accuracy, natural eye alignment, and stable recoil tracking—shot after shot.
Model/SKU: SACHSBL
UPC: 853418803929
Finish/Color: Black (low-glare, abrasion-resistant)
Fitment: AR-15 short-action pattern* (see compatibility notes)
*Shooters often use “short action” to describe AR-15 length receivers (5.56/.223, 224 Valkyrie, 6mm ARC, 6.5 Grendel, etc.). Always verify your upper/lower and cartridge interface before purchase.
Why Upgrade to the Fierce Black Chassis
Rigid accuracy foundation: A stiff, monolithic chassis minimizes flex and bedding shift so your zero stays put through heat cycles, travel, and seasonal swings.
Shooter-first ergonomics: Adjustable cheek height and length of pull let you dial a relaxed head position for faster target acquisition and less parallax error.
M-LOK® everywhere you need it: Add bipods, ARCA plates, barricade stops, QD cups, or weights exactly where performance demands—without unnecessary bulk.
Low-glare black finish: Professional aesthetics with real-world durability against scuffs, dust, rain, and range wear.
Better balance & tracking: Flat, bag-friendly geometry and optional weight tuning promote straight recoil and quicker sight return for follow-up shots.
Drop-in modernization: Replace dated furniture with a modern precision workflow—clean accessory management and consistent support across positions.
Key Features at a Glance
Platform: AR-15 short-action* receivers (verify pattern and magazine spec)
Adjustability: Micro-adjust cheek riser & length of pull (tool or tool-less varies by package—verify contents)
Forend: M-LOK® slots at multiple clock positions for accessories and internal/external weights
Buttstock Section: Flat underside for rear-bag tracking, integrated QD sling points (check inclusion)
Grip Interface: Accepts standard AR-style pistol grips (choose your preferred angle/texture)
Finish: Low-glare Black, abrasion-resistant coating
Model: SACHSBL | UPC: 853418803929
What’s in the box can vary. Confirm included mounting hardware, spacers, QD cups, and any ARCA/weight-kit compatibility with your retailer.
Real-World Performance Benefits
Repeatable precision: Rigid chassis + true bedding interface = consistent cold-bore and follow-up POI.
Natural eye alignment: Tune cheek/LOP to your scope height for less neck strain and steadier holds.
Positional stability: Forend and butt design work with barricades, tripods, and rear bags, ideal for PRS-style practice and field shooting.
Weatherproof confidence: Non-warping chassis resists moisture and temperature changes better than traditional stocks.
Ideal Use Cases
Predator & varmint hunting: Add a compact bipod and run steady strings on small targets with quick, confident follow-ups.
Long-range & steel practice: Build a forgiving positional rifle with tuned balance and repeatable ergonomics.
General precision carbine: Pair with a quality barrel and glass for a versatile rig that handles close-to-far engagements.
Compatibility & Fit Notes
Designed for AR-15–size receivers. Confirm your upper/lower pattern, magazine spec, and buffer/receiver extension before installation.
Works with most AR-style pistol grips and M-LOK® accessories.
Verify barrel contour & gas-block clearance, especially with full-length ARCA rails or weight kits.
If running heavy accessories: choose M-LOK® ARCA plates and compatible weights for the forend slot pattern.
Suggested Setup (Pro Tips)
Optic: 3–15x or 4–16x with a zero stop and consistent tracking; mount as low as practical, then adjust cheek height to match.
Support: Lightweight bipod (cant/lock), small rear bag, and a low-profile barricade stop.
Trigger: Crisp single- or two-stage to capitalize on the chassis’ stability.
Balance: Add M-LOK® weights/ARCA plate to tune center of gravity for your positional style.
Sling: Two-point QD sling for carry and quick loop-up shooting support.
Installation (Quick Guide)
Unload & clear your firearm.
Separate upper/lower; remove existing stock/handguard/furniture as required.
Fit receiver to the chassis per instructions; apply manufacturer torque specs to action/receiver screws.
Adjust cheek riser & LOP to your optic/position; lock settings.
Verify function: Magazine insertion/ejection, safety, trigger, and bolt travel.
Zero & confirm: Re-check torque after the first range session and validate zero.
New to chassis installs? A qualified armorer can ensure correct torque, thread prep, and magazine fitment.
Care & Maintenance
Wipe down with a damp cloth; avoid harsh solvents on the finish.
Re-torque action screws and forend accessories seasonally or after air/vehicle travel.
Inspect M-LOK® fasteners and QD points; use thread prep per accessory maker.
Protect exposed fasteners with a light corrosion inhibitor in humid or salty environments.
Specifications (Quick Reference)
Brand: Fierce Firearms
Product: Chassis Kit (Black)
Fitment: AR-15 short-action* pattern (verify your receiver)
Adjustability: Cheek height & length of pull
Mounting: M-LOK® forend; QD sling provisions (varies)
Finish: Black, low-glare, abrasion-resistant
SKU: SACHSBL
UPC: 853418803929
Frequently Asked Questions
Q: Will this fit an AR-10 (.308) large-frame build?
A: No—SACHSBL is intended for AR-15–size receivers; large-frame patterns are dimensionally different.
Q: Is an ARCA rail included?
A: Typically sold M-LOK®-only; add ARCA plates/rails as needed. Check your listing for included hardware.
Q: Can I add a folding mechanism?
A: Folding adapters depend on your buffer/receiver extension and recoil system. Confirm compatibility before purchase.
Q: What torque values should I use?
A: Follow Fierce and accessory-maker torque specifications. Witness-mark critical fasteners after setup.
Q: Will the black finish match other “black” accessories?
A: The chassis uses a premium low-gloss black; hue may vary slightly versus other anodized/Cerakoted parts.
SEO-Friendly Highlights (Naturally Woven)
Fierce Firearms Chassis Kit Black, AR-15 short-action precision chassis, adjustable cheek riser & LOP, M-LOK® forend, rigid bedding for repeatable accuracy, rear-bag-friendly stock geometry, modular precision rifle chassis SACHSBL, UPC 853418803929.
Meta for Your Product Page
Meta Title: Fierce Firearms Chassis Kit — Black | AR-15 Short-Action | SACHSBL
Meta Description: Modernize your AR-15 with the Fierce Black Chassis Kit. Adjustable cheek/LOP, M-LOK® forend, rigid accuracy foundation, and bag-friendly geometry. Model SACHSBL — UPC 853418803929.
Build your rifle around rigidity, adjustability, and modular control—the Fierce Firearms Black Chassis Kit (SACHSBL) is the precision base your AR deserves.
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