Just got the open bolt kit. On all the youtube vid's it shows all the parts. On my kit it comes with a large rubber spacer attached to the end of the spring retainer. Is this something new or did it always come with this? I never seen it in the vid's when they put an open bolt kit in.
I think with this rubber spacer it might have fixed the cracking/breaking of part 27 and 66.
I added and extra neoprene grommet on the spring as well to give an extra buffer to the blow back. Still as much kick as the closed bolt had even with the extra rubber. I have put 10 clips through zeroing the riffle and adjusting hop-up. Checked part 27 and 66 and no signs of cracking. I'm still not taking a chance though and going to put on deadly's 27 and the CNC 66.
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