VFC M249 GBBR Heavy Recoil Rod Upgrade - Install Guide 

When adding weight to the bolt, is the original spring enough to move it without problem?

Just dropping in to repeat something I commented on the previous video. Don't forget to shorten your detent spring on the MTW forged! The K2+ will put so much tension on the detent pin that it strips itself! Keep up the good work

Can’t wait for mine

would be cool to see the m249 recoil before and after the upgrade