Loading... Please wait...


In Orange County!
Airsoft Master LLC
7903 Knott Ave, Ste A
Buena Park, CA 90620

Phone: (714)523-1323

Mon-Sat 12pm - 7pm (PST)
Sun - Closed
Holidays - Call

Shop with Confidence

Airsoft Master
Additional Options
Airosft Master Accepts Credit Card Payments

Our Newsletter

Modify Hop Up Chamber 1-Piece Metal for M4/M16 Series AEGs

4 stars
(1 reviews)
Current Stock:
Out of stock
Usually ships in 1-2 work days

Out of Stock
Please checkback at a later time.

Modify Hop Up Chamber 1-Piece Metal for M4/M16 Series AEGs



  • Model: MOD M4 HU
  • Manufactured by: MODIFY Parts
  • Material: All Metal
  • Design: 1-Piece Design
  • Fits M4/M16 Series AEGs

Write your own product review

Product Reviews

  1. Quality Hop-up! 4 Star Review

    Posted by Mon Jul 16, 2012

    The quality of this item is very good. Provides good seal with bucking. Adjustment gear has an o-ring behind it to keep the hop-up from backing down, if anything almost too hard to adjust (only reason I didn't give it 5 stars). Comes with two different hop up arms. No lateral movement of arm, fits snug in the metal body. Lastly, I give airsoftmaster.com VERY high praise. Free shipping on item, and they STILL sent it priority mail, instead of regular first class. Packaged well with lots of packing peanuts.

Customers Also Viewed

Leave a comment or question about this product