The Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth is a US-made billet aluminium rifle bipod, part number TWBB-0400, with a quick-detach clamp for MIL-STD-1913 Picatinny rail. Five spring-loaded height notches run from 4.5″ / 114 mm with the legs at 45° to 6.0″–7.5″ / 152–190 mm at 90°, and a positive cant-lock lever gives ±35° of cant.
How It Compares
The wide-body WB chassis drops the rifle down between the legs and spreads the feet to 14.0″ / 356 mm, which is what kills the sideways hop under recoil. For the other rail standard take the Accu-Tac WB-4 Arca-Spec QD bipod in Flat Dark Earth. The same bipod is also stocked as the Accu-Tac WB-4 Picatinny QD bipod in Black. The Accu-Tac WB-5 wide-body bipod stands taller for shooting over cover. On a bench or firing point fit the Accu-Tac P-SKI Feet in Flat Dark Earth so the bipod slides rather than digs in. Compare the wider F-Class and benchrest selection, all shooting bipods in stock and our bipod accessories.
Ideal For
- F-Class and benchrest competition where the rifle must track straight under recoil
- Long-range target rifle from a bench or mat
- Load development and zeroing that demands a repeatable rest
- Prone deer stalking on flat ground where a wide, low stance helps
Key Features
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Mount: Quick-detach clamp for MIL-STD-1913 Picatinny rail — fits and releases without tools and returns to zero
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Chassis: Wide-body design positions the rifle low between the legs for maximum stability
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Height: 4.5″ / 114 mm at 45°; 6.0″–7.5″ / 152–190 mm at 90° over five notches
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Stance: 10.0″ / 254 mm at 45°; 14.0″ / 356 mm at 90°
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Cant: Up to ±35° with positive cant-lock lever
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Leg angles: 0°, 45°, 90° or folded flat for stowage
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Construction: 100% billet 6061-T6 aluminium with high-strength steel hardware
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Finish: Type III hard-anodize (Flat Dark Earth)
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Origin: Made in USA — designed, engineered and manufactured by Accu-Tac
Technical Specifications
| Mount Interface |
Quick-detach clamp for MIL-STD-1913 Picatinny rail |
| Materials |
6061-T6 aluminium; hardened-steel hardware |
| Cant Adjustment |
Up to ±35° with positive cant-lock lever |
| Leg Angles |
0°, 45°, 90°, folded |
| Height (45° legs) |
4.5″ / 114 mm |
| Height (90° legs) |
6.0″–7.5″ / 152–190 mm |
| Stance Width (45° legs) |
10.0″ / 254 mm |
| Stance Width (90° legs) |
14.0″ / 356 mm |
| Closed Width |
3.25″ / 82 mm |
| Closed Length |
7.5″ / 190 mm |
| Weight |
22.08 oz / 626 g |
| Finish |
Type III hard-anodize (Flat Dark Earth) |
| Warranty |
Accu-Tac Limited Warranty |
| Brand |
Accu-Tac (USA) |
| SKU / MPN / UPC |
TWBB-0400 / TWBB-0400 / 858520006602 |
What's Included
- 1 × Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth (TWBB-0400)
- 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 WB-4 Picatinny QD Bipod Flat Dark Earth 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 WB-4 Picatinny QD Bipod Flat Dark Earth give?
With the legs at 45° it stands at 4.5″ / 114 mm, and with the legs at 90° it covers 6.0″–7.5″ / 152–190 mm across five locking notches.
How wide is the stance on the Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth?
The stance is 10.0″ / 254 mm with the legs at 45° and 14.0″ / 356 mm with the legs at 90°.
How much cant does the Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth allow?
The positive cant-lock lever gives up to ±35°, which is enough to level the rifle across most slopes without moving the legs.
How much does the Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth weigh?
The Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth weighs 22.08 oz / 626 g.
Which feet fit the Accu-Tac WB-4 Picatinny QD Bipod Flat Dark Earth?
The Accu-Tac P-SKI Feet are listed for wide-stance bipods including the WB models, and the Accu-Tac Sled Feet (SF-A000) fit all Accu-Tac G1 and G2 bipods.
