Board Thread:General Nerf discussion/@comment-27306930-20160307192201/@comment-27306930-20160307230219

Might be. I don't have a Retaliator, so I really can't say. As I mentioned before, I did do a spring upgrade, just not a big one. Not seeing any springs from places like BlasterParts and OMW labeled specifically for the MKII, but it looks a lot like a Raider/Rampage/Retailiator spring. Betcha they'd probably work ;-)