AirsoftParts hop-up unit shims allow fine adjustment of the hop-up unit position relative to the nozzle and magazine. The stainless steel shims are only 0.1 mm thick and help resolve BB feeding issues or air leaks between the nozzle and hop-up bucking. Dimensions of 11.1 / 14.5 mm allow use with most common hop-up units. The package contains 3 pieces.

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RetroArms CNC hop-up unit M4 / AR15 BASIC in black is designed for AR15-type AEG airsoft guns, such as the M4, MK18, M16 or SR-25. The unit body is made of aircraft-grade aluminium alloy using precise CNC machining. The collet nut ensures precise centering of the inner barrel, while the O-ring at the unit entrance prevents BBs from falling out during...
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AirsoftParts hop-up bucking shims allow fine adjustment of the hop-up bucking position inside the chamber to compensate for differences in the length of its sealing lips. The stainless steel shims are only 0.2 mm thick and have an outer diameter of 9.85 mm. They help fine-tune the seal between the nozzle and bucking as well as resolve BB feeding issues....
This expert product description was prepared by the ANAREUS.cz expert team. All rights to this unique content are tied to the anareus.cz domain.AirsoftParts hop-up unit shims are designed to precisely fine-tune its position relative to the nozzle and magazine. Even a small deviation in unit positioning can affect how the nozzle seats against the hop-up bucking or how the magazine feeds BBs into the feed channel. The shims are only 0.1 mm thick, allowing the unit position to be adjusted in very small increments and helping resolve feeding issues or air leaks between the nozzle and hop-up bucking. Each shim is made from corrosion-resistant stainless steel and has an inner diameter of 11.1 mm and an outer diameter of 14.5 mm. These dimensions allow use with most common hop-up units. When fine-tuning, we recommend starting with one shim and checking magazine feeding, free nozzle movement and the air seal after each adjustment.
Each shim is only 0.1 mm thick, allowing very fine adjustment of the hop-up unit position within the assembly.
Correct unit positioning helps ensure proper interaction between the nozzle and hop-up bucking and can help eliminate air leaks caused by incorrect alignment between these components.
Shimming the unit allows its position relative to the magazine and nozzle to be fine-tuned, which can help resolve inconsistent or unreliable BB feeding.
The shims are made from stainless steel without any additional surface treatment and their precisely defined thickness makes them suitable for fine mechanical adjustment.
The 11.1 mm inner diameter and 14.5 mm outer diameter allow the shims to be used with most common hop-up units.
They are used to fine-tune the position of the hop-up unit relative to the nozzle and magazine. Correct positioning can help improve BB feeding and nozzle contact with the hop-up bucking.
Yes, if the air leak is caused by incorrect alignment between the nozzle and hop-up bucking. However, air leaks can also have other causes, so we recommend checking the bucking, nozzle and other air seal components as well.
The package contains three 0.1 mm shims, allowing adjustments of 0.1 mm, 0.2 mm or 0.3 mm. In practice, we recommend starting with one shim and adding more only as needed based on the result.
The dimensions of 11.1 mm inner diameter and 14.5 mm outer diameter allow use with most common hop-up units. However, due to differences in design and tolerances, we recommend checking the dimensions of the specific unit before installation.
| Variants | 0.1 mm |
| Color | Silver |
| Body/receiver material | Metal |
| Počet kusů v balení | 3 |
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