I have an FCD V3 upper and it has a hole for an anti rotation dowel rod. I am wanting a quad rail and thought about the hole for the rod. Are there any quad rails that have that feature? I'm already looking into a C4 rail but checked out a friends SOLGW M89 and noticed it had that feature and hadn't seen it on a quad rail before.
Quad rail with anti rotation rod
- Thread starter PRSDietitian
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