Cobra R9 Adder arrow nock
thingiverse
I am impressed with the arrow nock for Cobra R9/ Adder 7,5" bolts. The size is a perfect fit, so all that's needed is a small amount of glue to secure it in place. ABS is recommended for this application. Update: You can purchase high-quality nocks for Corbra Adder/R9 from Aliexpress at https://s.click.aliexpress.com/e/_ADW1dL, eliminating the need for printing altogether.
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