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Product Description
This is a R hop arm and nub kit for m4 prowin/dytac airsoft hop up's.
The arm has 5 slots for the nub to sit in, forward or backwards.
It lets the nub freely pivot allowing perfectly even pressure on a R hop patch.
This kit is basicly drop in if you use a smooth flat hop packing/bucking and a exact Elvish tac R hop patch.
It comes with 3 arms that all have slightly different depths to their slots.
It comes with 5 short nubs, 5 mid length nubs and 3 long nubs made for custom milled barrel/hopups if you are doing a ER hop. Each nub has diff a design. Use whatever you feel is the best for your setup. You need to make sure whatever nub you pick, center it on the patch, dont let it hang over onto the barrel window edges or it will not work and may break if you force it.
This kit is intended for a single build, but you can get away doing 3 builds if you desire. If you need bulk I have a 4x kit for that on my page.
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