SKU: 89475761294

Adjustable 3D Print Hop Up for JM Gen13 SJ M4 MK18

$9.89 $10.99
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15

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Description

Adjustable 3D Print Hop Up for JM Gen13 SJ M4 MK18This adjustable 3D print Hop Up is compatible with the SJ M4 MK18 and JM Gen13 gel blasters. Improve your accuracy and precision with this professional grade upgrade. Easy to install and use, perfect for gel blaster enthusiasts and experts. Don't settle for less, upgrade your blaster with this hop up today. Good for jm gen13, sijun sj m4 and sj mk18 gel ball blasters. Specifications: Brand: DK. Material: 3d print. Color: black. Length: 50mm. Outer

This adjustable 3D print Hop Up is compatible with the SJ M4 MK18 and JM Gen13 gel blasters. Improve your accuracy and precision with this professional-grade upgrade. Easy to install and use, perfect for gel blaster enthusiasts and experts. Don't settle for less, upgrade your blaster with this hop up today.

Good for jm gen13, sijun sj m4 and sj mk18 gel ball blasters.

Specifications:

Brand: DK.

Material: 3d print.

Color: black.

Length: 50mm.

Outer dia: 13mm.

Inner dia: 9.5mm.

Package includes: 1x sj m4 cqb hop up.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89475761294

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4.5 ★★★★★
Based on 1506 reviews
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Product Reviews
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Verified Purchase
J&S
Chelsea, US
★★★★★ 2
Not quite right….
Color: White, Size: Standard
I’m torn on this pillow. While it does have merit, there were some serious “flaws” for me. I am a side sleeper and I’ve been on the hunt for a neck supportive pillow. This didn’t have that for me. The night started with good possibility, but I woke up several hours in and found the pillow flat where I was; all the filling had moved to the top. It IS very cool to the touch and I could definitely tell it was cool while sleeping on it. The loft of this pillow is fine, but not stupendous, and the softness was pretty great. Overall, just not the best. If the filling had stayed put through the night, I might’ve kept, but as it was, I returned.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
T
Verified Purchase
Theresa
Phoenix, US
★★★★★ 5
Does the job!
Color: White, Size: Standard
This pillow offers superb support and stays cool. It replaced my previous one from a couple years back. I did notice that, like so many things, it isn’t as full as my previous one but still offers a good nights rest for this side sleeper.
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Reviewed in the United States on February 3, 2026
N
Verified Purchase
natawhat
San Leandro, US
★★★★★ 5
These pillows perform wonderfully and they hold up!
Color: Grey, Size: Standard, Color: Grey, Size: Standard
I have had these pillows for 5 years, so mine is not in brand new condition in this photo but they still appear pretty good and function wonderfully. I recommend these to others looking for a soft but supportive pillow. They are the standard microfiber cooling ones. I have one and my daughter (7) has the other. We use them every night and they are just the perfect amount of medium-softness for both of us despite us being very different in size! Still fluff back up, have just enough support and height or thickness in my opinion (I don’t like very firm microfiber pillows as much, and I don’t like the feather pillows that aren’t goose down because they get crunchy and flat). Love these pillows, the price is super reasonable for the product they provide. They have held up this long, I’d say they are of good quality. I’ve just ordered another set for a visit to my mothers house! Our favorite pillows!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
T
Verified Purchase
Tanner Pomeroy
Whiting, US
★★★★★ 5
Super Comfortable and Easy to Sleep On
Color: Memory Pillow, Size: Standard
HIMOON Shredded Memory Foam Pillows are honestly way more comfortable than I expected—they’re soft but still supportive, and I like that I can adjust and fluff them to fit how I sleep. They feel good for both side and back sleeping, and they don’t go flat like some cheaper pillows I’ve tried. After using them for a while, they’ve held up well and still feel cozy every night. Overall, just a really comfortable, no-stress pillow that makes it easy to fall asleep 👍
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Reviewed in the United States on April 25, 2026
C
Verified Purchase
customer
Birmingham, US
★★★★★ 4
Good pillows; wear a mask when fluffing and airing out
Color: Memory Pillow, Size: Standard
Searched everywhere for comfortable pillows, finally found this set. Perfect density and firmness, very comfortable. Downside is that they were covered in some type of white powder which dispersed as I was fluffing them up. Fiberglass, maybe? I recommend customers fluff and air them outside before use, and wear a mask. Pillows had an industrial smell, which dissipated after 20 minutes in the fresh air.
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Reviewed in the United States on April 8, 2025

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