HS-Armory IERZ-kit

This is a IERZ-kit from HS Armory. The R-hop is the ultimate hopup system on the market today and I don't make that statement lightly. The R-hop system not only greatly increases accuracy but also increases range at the same velocities. It distributes the pressure on the BB better than any other system available including flat-hops and all after market buckings. They also are intrinsically very durable and pretty much never wear out. These are an extended version of the Ice Z-kit which means there is 3 different thicknesses of patch included so the correct size can be chosen instead of having to be sanded down from a full thickness patch. These are made from the same material as the IR-hop (ICE R-hop) and the Z-kit except are much longer which gives them the ability to most consistently hop even the heaviest rounds on the market. The ICE material allows these to perform well even in cold climates or where gas guns can cool the hopup rubber down too much. To install these the barrel window needs to be extended. I only recommend you do that yourself if you know what your doing and how to do it correctly. It's highly recommended that you read the guide and maybe watch some videos to get the best install. Because of the material and the Z-kit patch sizing these are easier to install than normal ER-hops but still more difficult than normal R-hop due to the barrel cutting. If it's your first install you might want to look at the normal Z-kit as it's designed for the easiest installation.

Here is a quick overview install guide of the R-hop by HS5. (title is sarcasm)