Contact Us Tel:(626) 286-0360 Store Locations
COVID-19 UpdatesPhone Support M-F 9am-5pm PST
Browse by Type or Category
Happy July 4th! View Deals Here. Stay Safe! (Phone support will be closed on July 3rd)

Modify Accurate Hopup Chamber for M4/M16 Series Airsoft AEGs

ID: 37457 (HU-HP-02-01)
MOD HU M4 (HP-02-01)
Modify859188374577MOD HU M4 (HP-02-01)37457
4.7 stars, based on 9 reviews
Modify Accurate Hopup Chamber for M4/M16 Series Airsoft AEGs
Hover or touch above to zoom
Product image 1


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.
  • 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

    9 Customer Reviews

    (Write a review)

    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.
    by Jake B. on 09/15/2017
    "this is a very good hop up unit. it solves all of the problems of a traditional hop up so if your gun cant fit prowins or other aftermarket units this is perfect. for the price its great and i recommend it to anyone who is looking for a budget hopup unit.

    Questions, Answers and Comments

    Discuss about Modify Accurate Hopup Chamber for M4/M16 Series Airsoft AEGs with your friends and fellow shoppers!

    Comment or answer questions for a chance to win awesome prizes. Details can be found on the Facebook page. Remember to check "Also post on Facebook" when commenting to qualify for the giveaways!

    Have an urgent question about this item? We monitor these comments daily, but it may be faster to email us directly or call us at (626) 286-0360. Our resident experts are standing by to answer your questions!

    California Proposition 65 Warning: Cancer and Reproductive Harm -