Retro Arms CNC Machined Aluminum Hop-Up Unit for M4

  • $46.00
    Unit price per 
Shipping calculated at checkout.


  • CNC machined construction
  • Rotary design allows for easy adjustment
  • Constructed from EN AW 7075 for extended lifespan
  • All necessary hardware included
  • Bucking not included
  • Compatible with most M4 series Airsoft AEGs
  • SOME ASSEMBLY REQUIRED

Customer Reviews

Based on 2 reviews
100%
(2)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
P
Philbert Flores

EMG x Retro Arms CNC Machined Aluminum Hop-Up Unit for M4

J
Jesse
More accurate

I know this isn't the top of the line but for the person on a budget this is a great upgrade, I notice I'm hitting where I aim now lol. Bit hard to put together with no knowledge but I got it.


We Also Recommend