



SP-RETARMS-6564
Hop-Up Chamber for AK
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Pickup available at Skirmshop Spain
Usually ready in 24 hoursHop-Up chamber for AK airsoft replicas. This new Hop-Up chamber is made from EN AW 7075 aerospace-grade duralumin, which offers strength comparable to steel with the weight of aluminum, making it the best material for this application.
This chamber is precision-engineered and custom-made to ensure optimal performance and feeding.
For the best inner barrel fit, a new innovation has been introduced in the Hop-Up chamber – the collar nut connection. It is positioned in front of the Hop-Up chamber. Simply install the inner barrel with the Hop-Up bucking into the chamber, secure it with the C-clip lock, and finally screw it onto the Hop-Up chamber using the collar nut (a 10 mm wrench is required). The collar nut is made from EN AW 7075 aerospace-grade duralumin and, once tightened, seals the inner barrel very firmly. No excessive force is needed when installing the collar nut—apply only light pressure; otherwise, the inner barrel may rotate inside the Hop-Up chamber. The sign of optimal sealing is the reduction of the gap in the collar.
This Hop-Up package includes:
1pcs Hop-Up chamber for AK (anodized, made from EN AW 7075 aerospace-grade duralumin)
1pcs Adjustment lever (anodized, made from EN AW 7075 aerospace-grade duralumin)
1pcs Pressure lever with cut for standard spacers (anodized, made from EN AW 7075 aerospace-grade duralumin)
2pcs M2.5 x 3 mm screws (black chemical finish, steel material 12050)
1pcs M3 x 12 mm screw (steel material with 8.8 strength rating, black chemical finish)
1pcs Plastic C-clip for AK (ABS material)
1pcs Plastic pin (ABS material)
1pcs Rubber O-ring (vulcanized rubber)
1pcs Collar nut (anodized, made from EN AW 7075 aerospace-grade duralumin)
We recommend purchasing a spacer set, Hop-Up bucking, and a spare plastic C-clip lock or collar nut together with this Hop-Up chamber.
The Hop-Up chamber is delivered unassembled, meaning it must be assembled before use.
Warning! Do not use oil or petroleum jelly to lubricate Hop-Up components, as this may damage them and reduce the Hop-Up effect.
Pairs well with
In stock! Ships within 1-2 business days.
Complimentary shipping & returns

Hop-Up Chamber for AK
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
Do I need an account to order?
No, but an account lets you save addresses, review orders, download invoices and manage wish‑lists.
When will my order ship?
Orders placed before 15:00 CET on business days ship the same day if the
items are in stock. A tracking e-mail follows automatically.
Can I change or cancel my order?
Yes, e-mail orders@skirmshop.nl or use the contact form before 15:00 CET on the shipping day
with your order number. After dispatch, changes aren’t possible.
Do you ship outside the EU?
Yes, the shipping rates and import taxes will be calculated at checkout.
What is the minimum age to buy an airsoft replica?
Please check your own governments regulations for the minimum required age.
Don't forget to send your ID.