The Accu-Tac FD-4 Picatinny Bipod Black is a US-made billet aluminium rifle bipod, part number FDB-004, with a tool-free clamp for a standard Picatinny rail. Spring-loaded legs deploy from stowed to 90° in one movement, with five notch height settings from 5.5" (139.7 mm) minimum at 45° up to 6.75"–8.25" (171–210 mm) at 90°.
How It Compares
FD stands for fast deploy: a spring-loaded leg mechanism takes the legs from stowed to 90° in one motion, which is the difference between taking a shot and watching a deer leave. For the other rail standard take the Accu-Tac FD-4 Arca-Spec QD bipod; the Accu-Tac FD-5 bipod stands taller for shooting over cover. Add the Accu-Tac G2 Spiked Feet Set for soft ground. Compare every Accu-Tac bipod we stock, the wider rifle bipod line-up and bipod feet, rails and clamps.
Ideal For
- Prone deer stalking and general field shooting
- Target and gallery rifle at club distances
- Practical and service rifle from prone
- A first precision bipod for long-range and PRS-style shooting
Key Features
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Mount: Standard Picatinny rail (tool-free fitting) — fits and releases without tools and returns to zero
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Deployment: Fast-deploy spring-loaded leg mechanism — stowed to 90° in one motion
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Height: 5.5" (139.7 mm) minimum at 45°; 6.75"–8.25" (171–210 mm) at 90° over five notches
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Stance: 8.0"–12.25" (203–311 mm)
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Adjustment: Three leg-angle positions, each locking via a quick-detach lever
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Cant: Canting capability for levelling on uneven ground
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Folded size: 3.25" wide × 7.5" long
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Construction: 100% billet 6061-T6 aluminium with high-strength steel hardware
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Finish: Type III (MIL-SPEC) hard anodise
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Origin: Made in USA — designed, engineered and manufactured by Accu-Tac
Technical Specifications
| Mount |
Standard Picatinny rail (tool-free fitting) |
| Height, legs at 45° |
5.5" (139.7 mm) minimum |
| Height, legs at 90° |
6.75"–8.25" (171–210 mm) |
| Stance |
8.0"–12.25" (203–311 mm) |
| Folded size |
3.25" wide × 7.5" long |
| Weight |
20 oz (approx. 567 g) |
| Material |
Billet 6061 T6 aluminium alloy / high-strength steel hardware |
| Finish |
Type III (MIL-SPEC) hard anodise |
| Colour |
Flat Black |
| Brand |
Accu-Tac (USA) |
| SKU / MPN / UPC |
FDB-004 / FDB-004 / 858520006527 |
What's Included
- 1 × Accu-Tac FD-4 Picatinny Bipod Black (FDB-004)
- Manufacturer's documentation
Warranty
Covered by the Accu-Tac Limited Warranty against defects in materials and workmanship.
UK Delivery & Support
Every order is dispatched tracked from our UK warehouse, so there are no import duties or customs surprises, and you are backed by UK-based aftersales support from our team.
Frequently Asked Questions
What does the Accu-Tac FD-4 Picatinny Bipod Black mount to?
It clamps to a MIL-STD-1913 Picatinny rail, so it fits a Picatinny forend rail, a rail section on an M-LOK or KeyMod handguard, or a Picatinny sling-stud adapter. The clamp fits and releases without tools and returns to zero.
What height does the Accu-Tac FD-4 Picatinny Bipod Black give?
With the legs at 45° the minimum height is 5.5" (139.7 mm) minimum, and with the legs at 90° it adjusts across 6.75"–8.25" (171–210 mm).
How wide is the stance on the Accu-Tac FD-4 Picatinny Bipod Black?
The stance is 8.0"–12.25" (203–311 mm).
How quickly do the legs on the Accu-Tac FD-4 Picatinny Bipod Black deploy?
The legs are spring-loaded and go from stowed to the 90° shooting position in a single motion, then lock with a quick-detach lever.
How much does the Accu-Tac FD-4 Picatinny Bipod Black weigh?
The Accu-Tac FD-4 Picatinny Bipod Black weighs 20 oz (approx. 567 g).
