For use with R-Hopped inner barrels with a flat hopped bucking.
After spending years modifying hop up arms with the M-Nub modification that is necessary to have a proper R-Hopped barrel assembly, we turned to 3D printing technology to produce our own in house arms that deliver improved consistency and tolerances. We have been developing these arms over the years making countless revisions and changes. Now, we are happy to finally offer our customers proven hop up arms for their units, that are drop in ready for R-Hopped use.
No M-Nub or modifications required.
Sold in sets of two.