Mod 9 V2 uses a 1:10 scale Traxxas shock absorber as a Hydraulic buffer. 
What to look for when sourcing shock absorbers:
1.	1:10 scale front shock absorber
2.	Hole to hole length is 92mm
3.	Steel or Titanium shafts, it’s been pointed out that many come with aluminum shafts which will not work for our application. 
4.	Buy the same ones that Derwood and Mussy did to develop Mod9 V2. These have stainless steel shafts.  https://www.ebay.com/itm/SILVER-RC-Car-Aluminum-Front-Rear-Shock-Absorber-4P-For-1-10-Traxxas-Slash-4x4/292378662723?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2648