A+ REAPS Hop-Up rubber
The Hop-Up rubber is made of silicone thanks to which is keeps all of its featuresalso in low temperatures while it does not harden like in the case of an ordinary hop-up rubber. It performs perfectly in typical conditions and also in negative temperatures.
Thanks to a special construction the REAPS system ( Range Extended Adjustable Project System ) allows to gain an extended, but stable flight trajectory of the BB pellets what outcomes in a significant improvement of shot concentration. Simultanously, the tests made by a number of independent test groups have shown a significant increase of the effective shot range in the replicas equipped with the REAPS HU even up to 50% in comparison to the Hop-Up rubber of other manufacturers. The outcome is of course dependant on the general configuration of the replica and the sealing of the whole system and, depedning on the replica, may vary significantly from the results gained in the tests.
The videos shown below illustrates a test of the REAPS HU system that was carried out by the RA-TECH company. The second video is the video of the A+ company showing the possibilities of the new Hop-Up rubbers.
What is the Hop-Up system?
The Hop-Up system is a system giving the BB pellet shot by airsoft replicas a spin movement. It uses the Magnus effect to flatten the trajectory of a flying bullet and, therefore, it makes it look similar to the trajectory of a real firearm’s bullet.
In reality, it is a properly shaped rubber or silicon seal that by touching a sped BB pellet gives it a rotation. The easiest way to explain what the Hop-Up system is to say that a BB pellet that is spun from one side generates more friction to the air so that it can turn. If the rotation will take place in the horizontal axis the BB pellet will turn upwards and compensate the force of gravitation.
The level of how strong the Hop-Up rubber touches the BB pellet determines how strong it will rotate and, therefore, go up. The heavier the BB pellets is the greater must be the pressure of the Hop-Up rubber ( while the heavier BB pellet has a greater inertia and falls down more quickly ). It works the other way around too – when a light BB pellet will be rotated to strongly it can go above the firing line.