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EMG x Retro Arms CNC Machined Aluminum Hop-Up Unit for AK Series Airsoft AEGs (Color: EMG Blue)

ID: 21542 (HU-EMGxRetro-6564-BL)
EMG x Retro Arms CNC Machined Aluminum Hop-Up Unit for AK Series Airsoft AEGs (Color: EMG Blue)
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EMGRetro Arms


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.
Color Options:


  • CNC machined construction
  • Striking EMG Blue anodized finish
  • Constructed from EN AW 7075 for extended lifespan
  • All required hardware included
  • EMG logo engraved on underside face of unit

Manufacturer: EMG x Retro Arms


Compatibility: Most AK series Airsoft AEGs
Material: Aluminum alloy

About EMG

The EMG vision is to manufacture products the world has never seen before; products we would put our name on, and products that hit the spot! "EMG" (Evike Manufacturing Group) was spawned from the realization that if you want something done exactly the way you want it, you need to do it yourself, and we did just that.
We took our 16 years of knowledge as the market's lead retailer, our network of 300+ superior manufacturers, to work with inspiring top innovators in the firearms industry. That combined with the vision to invest into the Airsoft industry, an industry we believe in, EMG was born.

6 Customer Reviews

(Write a review)

by Jonathan B. on 11/14/2022
"The hop is indeed up on the particular device.
by Michael W. on 02/02/2021
"This is a well-made, precisely machined hopup unit. It required no fitting, sanding, or dremeling of any kind to install into my LCT LCK104. The only thing I wasn't 100% satisfied with was that the screw that holds this hopup unit to the gearbox wouldn't thread all the way in. Not a big deal at all though as it's still held solidly in place, it just looks kinda funny. Just to be clear, this is solely an aesthetic issue, not a functional issue. I tried Prometheus Purple, G&G Green, and Madbull Blue hop up buckings. While they all fit, the Madbull was a substantially tighter fit than the rest, and I had to use some white lithium grease as a lubricant to ease the bucking into place. I recommend the Prometheus Purple and the G&G Green buckings as they slid in easier, while still providing a perfect air seal. I had no feeding issues using G&P AK74 mags and BLS biodegradable .32 gram bbs.
by James E. on 10/21/2020
"This unit is literally the same as the regular retro arms unit. They are superb units, and the blue anodized one looks amazing. I bought it because I was in the market for a new hop up unit for my E&L ak 74 and this one happened to be the same color as my retro arms blue anodized aluminum trigger. This hopup requires no modification to fit into an E&L but will not fit a CYMA ak out of the box. I can't speak for LCT ak's. Overall the unit helped me hit 400 fps with less than a 2 fps margin of error in either direction with a G&G green bucking and angel custom 6.01mm inner barrel. As far as ak's go this is the best hopup you can get

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