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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
For Your Every Summer RSVP, with Code: SUMMER15
Description
VSR Concave Bucking 40º (Black)Material: Silicone rubber Hardness: Shore A40 (black) Compatibility: VSR 10 chamber Only works with Airsoftphilosopher barrels. Recommended FPS: 200600 fps (equivalent to 0. 4 3. 3 joules) Perfect fit in the Airsoftphilosopher hop up window Having a high quality, properly cut inner barrel inside your airsoft replica is important, but even more important is their compatibility with each other. If the cut does not perfectly match the hop up window of
Material:
Silicone rubber
Hardness:
Shore A40 (black)
Compatibility:
VSR-10 chamber
Only works with Airsoftphilosopher barrels.
Recommended FPS:
200–600 fps (equivalent to 0.4 – 3.3 joules)
Perfect fit in the Airsoftphilosopher hop-up window
Having a high-quality, properly cut inner barrel inside your airsoft replica is important, but even more important is their compatibility with each other. If the cut does not perfectly match the hop-up window of the barrel, or if the chamber applies downward pressure in the wrong place, the hop-up bucking cannot reach its full potential.
That is why we carefully design our products to achieve the best possible results when used in the correct setup.
As shown in the image, the patch covers the entire length of the window, while still leaving a small gap so the patch can move up and down without tension. Even the barrel edges are chamfered for longer service life and sufficient space for downward movement.
Designed for Maximum Performance
The concave bucking is designed to reach the physical limits of accuracy and range. It provides a 6.6 mm long contact patch to perfectly guide the BB and apply precise backspin.
The best results are achieved with the Airsoftphilosopher VSR chamber or the Maxx Model AEG chamber with a concave nub.
Note: Most chambers are not designed for large hop-up windows and bridged barrels. Make sure that the hop-up arm and nub apply pressure in the correct position.
Perfect air seal
Each hop-up bucking has two main tasks:
Applying perfect hop and providing an air seal.
Therefore, the feeding lip of the Airsoftphilosopher concave bucking is tighter than other buckings to provide a perfect air seal. The special design reduces feeding issues.
Additional 3D printing on the exterior improves the tight fit inside the chamber.
(Each chamber has slightly different dimensions, so if the air seal is not optimal with your chamber, wrap one or two layers of Teflon tape around the outside.)
Specially developed material
The durable silicone rubber is designed to create perfect friction between the BB and the bucking. The large contact area of the patch allows you to use a very soft bucking that creates a perfect air seal and is still capable of lifting heavier BBs.
Due to the special compound, the silicone rubber has greater compression stability and reliably returns to its original position even after prolonged use.
Polished surface
Each bucking features a polished surface to provide maximum tolerance and consistency.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Love these lights!
These lights are perfect for the patio table. They give off the perfect amount of light!
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Bright light
Well made. Lights bright.
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Reviewed in the United States on May 14, 2026
★★★★★ 4
Very nice lighting
Lights work great. Lights up the table area and looks great.
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Expectations exceeded (and illuminated!)
I am so stoked about this purchase. Our outdoor lighting situation was terrible- motion-activated lights that cut out after ten minutes and zero power outlets outside. This umbrella light exceeded every expectation. Three brightness modes, all bright enough to actually see what you’re doing — no more squinting while socializing, reading, or attempting to do “work” outside. Cordless, easy to install, and long lasting. If you consistently forget to turn them off when you're done, you'll get about a week and a half from the batteries on the lowest setting.
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Reviewed in the United States on October 15, 2025
★★★★★ 5
Let there be light!
Easy to assemble. Lights are very bright. Very sturdy even with terrible storms it's still working and bright
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Reviewed in the United States on January 27, 2026