Retro Arms CNC Aluminum Hop Up Chamber | M4 Series Airsoft AEGs

(4 customer reviews)

$64.99

Out of stock

Category:

Description

Features

  • CNC machined construction
  • Rotary design allows for easy adjustment
  • Constructed from EN AW 7075 for extended lifespan
  • All necessary hardware included
  • Includes standard bucking arm & flat hop arm
  • Bucking not included

 

Compatibility: Most M4 series Airsoft AEGs
Material: Aluminum alloy

4 reviews for Retro Arms CNC Aluminum Hop Up Chamber | M4 Series Airsoft AEGs

5.0
Based on 4 reviews
5 star
100
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
  1. Michael Betts (verified owner)

    Very nice finish on all included parts. Fit my g&g combat machine no problem. The flat hop arm and nub that comes with hop unit is to short and at full hop there was no rubber protruding into the barrel (probably ok if using a R hop patch). Using standard arm with Prometheus flat hop nub you only get hop rubber protruding into the barrel on the second half of the adjustment, with a flat hop rubber. Side not check for burrs, I found burrs in both windows for the oring to stop bbs falling back out covering almost the whole window.

  2. Michael Betts (verified owner)

    This is my go to hop unit I use it in every gun it fits in. this time was a KWA ronin m4. had to change nozzle for it to feed and fire. Stock kwa would not hop 0.25 and could not get 5 different types or rubbers to fit in stock kwa hop up (chamber had smaller ID then normal)
    Same bur on this 1 as the last 1 (check previous review for info)

    Image #1 from Michael Betts
    Image #2 from Michael Betts
    Image #3 from Michael Betts
  3. Andrew D. (verified owner)

    Am currently machining down to fit another replica as a trial. Was cheap enough to risk it if doesn’t work out

  4. Degan R. (verified owner)

    So so good

Only logged in customers who have purchased this product may leave a review.