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Pre-Order ETA February 2022 ProWin / Dytac CNC Hopup Chamber for M4/M16 Series Airsoft AEG Rifles

ID: 40058 (HU-PW-M4)
DY-AP25 / PW-Chamber-M4
DYTAC859188400580DY-AP25 / PW-Chamber-M440058
4.0 stars, based on 49 reviews
Pre-Order ETA February 2022 ProWin / Dytac CNC Hopup Chamber for M4/M16 Series Airsoft AEG Rifles
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Pre-orders are always filled first but you can sign up below to be notified when the item is becomes available for immediate purchase.

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.

This is a pre-order item with an ETA (estimated arrival) of February 2022

A pre-order item is an up coming new product, or an item in the process of being restocked to the platform by it's manufacturer.By pre-ordering an item, you will have reserved the inventory availability to receive it before the goods arrive. All pre-order items are eligible for a full refund at any time during the waiting period; simply call or drop us an email with the order # and the pre-order item you would like to cancel for an immediate refund. Due to circumstances such as US customs inspection, factory delays and other situations out of our control, all ETAs (estimated time of arrival) are estimated to our best ability and are subject to change.


  • High performance M4 hopup unit.
  • CNC out of aircraft grade aluminum.
  • Superb air seal.
  • Superb durability.
  • Anodized surface treatment.

Manufacturer: ProWin


Compatibility: For Matrix, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Rifles
Material: CNC Aluminum


The DYTAC team has over a decade of experience in Airsoft manufacturing and computer assisted product development and design.We keep up to date with real firearms development and knowledge, and understand how real firearms and Airsoft function to form a sophisticated knowledge pool for our brand. We also understand the purposes, capabilities and limitations between real firearms and Airsoft, and our design reflects upon this understanding by merging the functions suitable for use on a real firearm in Airsoft, at the same time complimenting the internal functions of an Airsoft gun or accessory.

49 Customer Reviews

(Write a review)

by Kevin S. on 08/20/2021
"Great Hop-Up Unit
Fits into Specna Arms Edge and Arcturus M4s
does not include nub or bucking so keep that in mind
No clicks on hop up wheel but has quite the amount of friction to keep it from undialing itself.
by Bradyn K. on 09/30/2020
"Great unit for a great price. Bought this for my CYMA m4 and paired it with a promy tight bore barrel and a modify hard flat hop up bucking and flat nub. gun shoots way more consistently now. fps is more stable being roughly 393-403. air seal is better and works great with the other stuff i got. adjusting the hopup is also way better than the stock unit, fine adjustments are much easier to do. Great quality product and would definitely recommend, especially if you're on a budget. Also looks are pretty nice, love pulling back the bolt just to see my shiny new unit!
by Gabriel L. on 08/07/2020
"I have used 3 or 4 different hop ups before i tried this one and i can say that this unit is seriously the best. What i mean is that its consistent, it handles high FPS guns well, doesn't fall out of adjustment easily and grabs the magazine every time. For what there asking for it in price is very worth the money. I paired it with a mad bull 6.03 barrel and it makes a 120 dollar gun shoot like a 300 dollar gun. Simple upgrades go far if you put the money were it counts.

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This is a pre-order item.

Pre-order estimated arrival: February 2022

By adding a pre-order item to your shopping cart, you will guarantee yourself to have the item reserved before they are offered as an in-stock item. Often, you will also save on shipping while not risking a rate item being sold out before you have a chance to buy it. Being the largest Airsoft distributor in the America continent, is the gateway for many exciting items entering the Airsoft world. All pre-order items are tagged with our best estimate on arrival times factoring in manufacture delay, us custom examinations and other factorys to the best of our ability. The goods on pre-order generally arrive before they are past due or on-time 99% of the time. All pre-order items are processed subject to item availability on a first-come, first serve basis. All orders and payments are processed at the time of payment. Buyer reserve the rights to a full refund on any pending pre-order items at any time.

This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.

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