Sold out? Claim it anyway at 25% off. Thanks to your overwhelming interest and the sharing of our posts in groups, our stock went incredibly fast. Because we want everyone to have a fair chance, you can now still claim a product that is sold out at our warehouse and at our supplier at a discount: you pay now, we deliver as soon as it arrives, and you can cancel free of charge until it ships. Claims are open until Monday 9 November 12:00.
Previous price (lowest price in the last 30 days)
Including VAT, excluding shipping.
Still want this product at 25% off? Claim it. We cannot give a date for when it will be back in stock. You pay now; as long as your order has not shipped you can cancel it and get your money back right away.
Please note: because of the opening weekend and the rush that comes with it, the delivery time may differ. Allow 5–15 working days.
Shipping from €19.95
Temporarily sold out
Leave your e-mail address and we mail you once when this product is back in stock.
We will e-mail you as soon as the product is back in stock.
Please note: because of the opening weekend and the rush that comes with it, the delivery time may differ. Allow 5–15 working days.
Shipped with GLS from our stock in the Netherlands; ordered before 12:00 ships the same working day.
14-day right of withdrawal and 60-day returns; start a return from your order.
The Prowin M4 Hop Up Chamber is a great upgrade to your AEG's standard plastic, or weakly cast metal hop up chamber.
Aluminium CNC fabricated Hop Up chambers are known to give a much better air seal than the standard Hop Up chambers built into a new airsoft replica.
However, many cast metal Hop Up Chambers have weak spots in the metal caused by the casting process, but this problem is completely eliminated with the ProWin Chamber.
This Hop Up Chamber is made entirely of Aircraft Grade Aluminium, which means it is both lightweight and durable, and the bright blue colour helps give your AEG a custom look.
Airsoft Bazaar B.V. · Frankrijkstraat 4, 5171 PR Kaatsheuvel · Chamber of Commerce (KvK) no. 99363534 · VAT no. NL868954482B01
© Airsoft Bazaar - All Rights Reserved 2026