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Home » Airsoft Accessories, Attachments & Parts » AEG Internal Parts » Hop-Up » M4 / M16 Series Hop-Up

Modify Accurate Hopup Chamber for M4/M16 Series Airsoft AEGs

ID: 37457 (HU-HP-02-01)
HP-02-01
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Modify Airsoft

$25.00

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.
Order Today Receive as soon as Thu Jul. 16

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Product Description

Features:
  • One Piece Precision Hop-Up Unit
  • Built for Speed and Accuracy
  • Designed for highly precise hopup tuning
  • Redesigned pressure plate by adding an adjustment gear allowing for easier, more accurate adjustment
  • Includes Chamber Parts (Bucking not Included)

    • Compatibility: Standard TM Compatible and other similar M4/M16 Series Airsoft AEG Rifles

    Manufacturer: Modify

    12 Customer Reviews

    (Write a review)

    by Matthew H. on 04/13/2026
    "This is a nice metal hop-up chamber. It's strong and well made, and the extra arm is nice. If you need to replace an old or broken chamber, this would be a great choice (=
    by Skyler H. on 08/10/2019
    "Great Hop up unit, fits great on my CYMA AA16 M4. Uses rubber washers instead of the clips to hold in the gears making for a more sturdy gear rotation. A little bit tiht but thats what you want. Comes with a hop up arm with a built in knub and one that can fit in a fishbone knub to a flat hop.
    by Hunter D. on 12/28/2017
    "Works great, its very very touchy though. (Barely move it to adjust alot) I recommend this to anyone who is trying to lift bb weight .28's and higher only. Works best with those weights from what I tested.

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    Modify Airsoft