R-Hop mod kit made by the Italian Psionic Upgrades brand.

Kit components

-Smooth Hop Up bucking with O-rings

-Two concave spacers

-Two strips of tape for mounting the set without using glue

Features of the set_

- Easy assembly that does not require glue and barrel modification

- Large operating range, from 0.8J to 1.5J

- Proprietary material, no admixture of silicone.

- Temperature resistance up to -10°C

- Higher abrasion resistance

- High flexibility and barrel fit (better sealing)

- Increased friction compared to silicone, strengthening the curl of the BB.