Recent content by Simi

Here is a video of my mods

I have contacted RTI ARMS direct. https://www.rtiarms.eu/. RTI has send me a new valve for my Prophet II, without returning the old one. I am very pleased. Very good customer service. Simon

Can you remove the barrel. Push a slug or pellet into the barrel with a piece of wood? The big transferports has sharp edges. Possibly these are scraping a little bit lead of the slug/pellet. With my RPB barrel that was the case. I carefully removed the sharp edges with a small Dremel tool and...

Thank you. Is RTI ARMS shop a different company? I do like the machining and the simplicity of my Prophet II. Changing caliber, pressure and other things is easy. Today I have studied the valve seat. After a lot of shots I concerned that the blok would wear out. That isn't the case. The valve...

I could not cock the gun right out of the package, because the trigger did not go back. The spring was sitting between the pull rod and the housing. I did not have the same issue after. Maybe the cause would be shipping. The package I received was undamaged from the outside. Maybe RTI is...

The valve is balanced/assisted. That means, the valve has a little hole, and sits at atmospheric pressure. Now the valve opens with less hammer weight. When the hammer hits the valve, air is escaping the high pressure side, making a venturi effect sucking the valve open. When the pressure...

My first valve was leaking. After sending a message, RTI send me a new valve. My second broke. Send RTI a message, twice, no response. Simon

I have bought a Prophet II a couple of years ago. The spring of the trigger was not seating correct. When pulling the trigger, the trigger did not go back. Fixed the spring myself. When shooting the gun in quality control that would be noticed before leaving the factory. Simon

What is exactly the problem? Can you move the handle and tension the spring? Or the hammer doesn't lock in position? If first remove the left side on the cocking mechanism and examine the point of failure. Second remove the richt side cover and check if the trigger mechanism is holding the...

Exactly. If that not solves your problem, you can cut one ring of your spring. Then grind the spring nice and flat. Then sand the surface smooth. Last scot & bright. Wash the spring clean with break cleaner. Installing with grease.

So you can try this. Open the backside and take a look at the spring. Sometimes the spring is not fitting the adjuster wheel. Because of the space between hammer and valve. The reason is hammer bounce. The spring can go wrong on the adjuster. You can solve this by squeeze the spring slightly...

The Prophet is amazing. I like the design and minimalism. The cocking can be better. I have made a video about the mechanism improvements. The pelletpusher has a bolt with an iron bush. When cocking that bush rounds the corner before going down. Also when shooting minimal movement backwards. In...

80 bar with no ristriction

I have noticed after shooting a lot with the .177. Use 10 Grain or higher. No need for restrictor. The heavier knockout slugs 13Gr work better, then the 10Gr.

50.15Grain KnockOut slugs