CNC Aluminum Hopup Chamber M4A - PRO

CNC Aluminum Hopup Chamber M4A - PRO

Regular price€89,90
Tax included.

  • Worldwide shipping
  • In stock, ready to ship
  • Inventory on the way
The M4A Pro (with BB locking system) CNC aluminum hopup chamber unit is precision machined to perform accurately and consistently on Tokyo Marui standard M4/M16 AEG series (including G&G, KRYTAC, except KWA).
The M4A Hopup Chamber unit is built with an aluminum rotary knob for precise hopup adjustments, precision Hopup lever and 4mm Bucking nubs (6mm Bucking nubs are optional) to work best with R-Hop and Standard-Hop to keep your BB shot accurate and consistently on every single shot. The M4A Hopup Chamber unit is designed to accept nozzles ranging in length from 21.00mm to 21.25mm and is fully Compatible with most aftermarket soft and hard rubber mounts without losing FPS or dropping BBs during use. The Hopup Chamber M4A unit is cleverly equipped with an interchangeable 11mm OD input adapter for ensure that the hopup unit is inserted exactly in the center of the nozzle outlet of the AEG/HPA motor with 11mm internal hole without wobbling. (OD11.5mm and OD12mm inlet adapters are optional) Removable CNC brass side wings have also been fitted to slide smoothly into the outer barrel slots and an advanced CNC Delrin locking C-clip is included for keep the inner barrel securely in place without wobbling and twisting. Additionally, the Hopup Chamber M4A Pro unit is specially designed with a new BB locking system to prevent the BB from falling out after removing the magazine. The locking arm can also be manually pressed to release the remaining BB from inside the hopup chamber.

***The Dual UV LED tracer module is an additional option to illuminate BBs in the dark. Operating voltage 7VDC to 15VDC (2-4 cell LiPo, 6-13 cell NiCad). (Sold separately)
***Test Results: FPS could be increased from 10FPS to 30FPS compared to the standard configuration. Please check your FPS!

Delivery times vary according to the region and the type of courier, usually from 4/5 working days. All our products are covered by warranty and customer support that will follow you in case of any need.


Our refund policy and return lasts 15 days. If 15 days have passed since your purchase, we cannot offer you a full refund or exchange. To be eligible for a return, your item must be unused and in the same condition you received it. It must also be in the original packaging. To complete the return, we require a receipt or proof of purchase. Please do not return your purchase to the manufacturer.


Once your return has been received and inspected, we will send you an email to let you know that we have received your returned item. We will also notify you when your refund has been approved or denied. If you are approved, your refund will be processed and a credit will automatically be applied to your credit card or original payment method, within a certain number of days.


If you have not yet received a refund, please check your bank account again. Then contact your credit card company, it may take some time for your refund to be officially posted. Then contact your bank. There is often some processing time before a refund is posted. If you have done all of this and still have not received your refund, please contact us at {email address}.


Only regular priced items can be refunded. Sale items cannot be refunded.


You will be responsible for paying your own shipping costs for returning your item. Shipping costs are not refundable. If you receive a refund, the cost of return shipping will be deducted from your refund. Depending on where you live, the time it takes for your exchanged product to reach you may vary. If you are returning more expensive items, you may want to consider using a trackable shipping service or purchasing shipping insurance. We do not guarantee that we will receive the returned item.

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