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KJW M9 Hop Up Unit Screw - One Piece

ID: 57578 (Part-KJW-ZZKM913)
5.0 stars, based on 2 reviews
KJW M9 Hop Up Unit Screw - One Piece
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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.


  • OEM factory replacement component
  • Metal alloy construction
  • Constructed to factory specifications ensure proper fit
Compatibility: KJW and Tokyo Marui M9 series Airsoft gas blowback pistols
Material: Metal alloy

Manufacturer: KJW

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2 Customer Reviews

(Write a review)

by Pedro S. on 11/14/2017
"I ordered this piece and all the other ones to build a complete hop up, but I didn't add this to a KJW M9. I added it into a WE M9 Cutlass. After all the the research I did on-line and asking people they all said "No KJW and WE are totally different and can not be cross compatible Hop up wise." Well being curious I bought two of each of the Hop up Pieces and they arrived Monday 20171117 I did no modifications to the chamber itself put in the lever that goes in an M9 and put the pistol back together and it feeds and fires 10 times better than the stock WE hop up and barrel. I highly recommend you do this upgrade to your WE M9 and enjoy using actual barrels and hop ups like the pistol was intended to.
by Pedro S. on 11/14/2017
"To start off I bought this KJW hop up screw and all the other little bits and pieces needed to make it a working piece all except the rubber bumper. Now I got two of each why you ask? So I can add the newly built hop up chamber into both my WE M9 Cutlasses. But many will say that WE and KJW are not hop up compatible as the WE M9 has a proprietary two piece Hop up and barrel. Well good news is I tried and successfully installed and tested the hop up and it %100 completely works and actually has hop! No modification needed unless you need the rubber bumper (located in the front of the Hop Up chamber) So with this I leave that magical answer of how to get rid of that old and useless WE M9 atrocity of a hop up chamber and add a better VSR 10 compatible hop up chamber. *For actual proof look up airsoft teching Q&A on Facebook Pedro Antonio Sanchez.

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