Contact Us Tel:(626) 286-0360 Store Locations
Phone Support M-F 9am-5pm PST
Browse by Type or Category
FREE SHIPPING for orders over $99! New deals released hourly and daily. See Deals Here!

Retro Arms Polymer 16 Steel Teeth Polymer Piston Body

ID: 59006 (RA-6696)
Retro Arms859188590069669659006
4.9 stars, based on 7 reviews
Retro Arms Polymer 16 Steel Teeth Polymer Piston Body
Hover or touch above to zoom
Product image 1 Product image 2
Retro Arms


This item is currently Sold Out


  • Polymer body featuring carbon fiber and molybdenum infusion
  • CNC milled and heat treated 16 tooth piston rack
  • Final tooth shaved for angle of engagement improvement
  • Injection molded body
  • Compatible with nearly all AEG gearbox versions and internal parts
  • One of a kind construction and design

Color: Black

The piston may very well be one of the most important parts of the AEG gearbox, knowing this it is essential to install a high quality piston in nearly any build.

Introducing the Retro Arms polymer bodied steel toothed piston. Featuring a injection molded polymer body infused with carbon fiber and molybdenum paired with a CNC milled and heat treated tooth rack, this Retro Arms piston is surely one of a kind. To further increase reliablity, the final tooth has been shaved to help improve angle of engagement and reduce premature wear. Whether you are simply installing a higher quality piston in your AEG due to a piston failure or you are building a high end set up, the Retro Arms Polymer 16 Steel Teeth Polymer Piston is sure to hold up to the task and then some.

Part: AEG Piston
Color: Black
Compatibility: Most common AEG gearbox versions
Material: Polymer / Steel

Manufacturer:Retro Arms

7 Customer Reviews

(Write a review)

by Bill S. on 01/14/2021
"this is my favorite piston to use. very strong material with pickup tooth support on the back. angle of engagement is super easy with this, no need to file or dremel down teeth.
by yaotian z. on 06/03/2019
"I heard some bad review of the earlier batch of this piston but none the less gave this piston a try. So far so good in my Krytac Gate Titan Krytac Spr build. It's the only piston I tried that is a direct drop in after market piston for a Krytac gear box. The omitted last tooth and shaved second to last tooth makes it hassle free for AOE correction. I've tried SHS swiss cheesed, Lonex red, and Kratos but most of them seem fits too tightly on the rails or the rack is too low and cause excess drag on the sector gears for a krytac. After around 30k round I disassembled the gear box and the piston still seems fine. I did ran into PME twice during that period and broke two bevel gears. However the piston seemed to have survived the incidents despite it being full stroke. Make sure to glue the rack to reduce chance of failure and short stroke the sector gear for RPS higher than 25 on M115 spring.

Build: Krytac SPR 400fps Gate titan with M115 spring full stroke (probably should have short stroked 1 teeth). Have put ASG 22k, 30k, 40K, Tienly 30K, Action Army 30K in the gun. Anything more than 30K ran into PME in full auto and got the motor hot very quickly so I settled for 30K and 22K motors.
by Johnson P. on 10/27/2018

Comments & Community

Discuss about Retro Arms Polymer 16 Steel Teeth Polymer Piston Body with your friends and fellow shoppers!

Have an urgent question about this item? Contact us, our resident experts are standing by to answer your questions!

California Proposition 65 Warning: Cancer and Reproductive Harm -

This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.