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I've managed to round off the regulator screw on my gun. It's hard to believe FX made this adjustment screw out of brass. Hardened hex keys don't treat brass kindly! I've been using a ball nosed hex screw driver to adjust it. I have to avoid the trigger when adjusting so the driver is always...

Greetings, Because of physics and the gas laws, there will always be pressure differences just after a fill... hot air cooling down and all that. I'm wondering what the typical air pressure difference is after a fill? I have an Impact M4 Sniper. How long does your gauge take to normalize...

My main tank gauge is leaking air. I can see bubbles at the threads when I put alcohol on it after a fill. Air-Gun Depot suggested tightening it up. I took off the plastic cover that surrounds the gauge to expose the flats for a wrench to tighten it. I tried to tighten it but the air pressure...

FYI, the Zulus 520R's will arrive at DNT tomorrow. I just inquired about my order. I ordered the 5-20x so those for sure will be in tomorrow. I've had mine on order since the 27th and been drooling ever since. HA Sign up for their emails and get 10% off.

I was trying to set up a new tune for a light pellet. I wanted the micro at 1 - 1.5 as a starting point. I moved the micro down from 3.0 by spinning the micro adjuster but it stopped moving once I got below 1.5. Now it won't move at all! It won't move with macro rotation either up or down...

I’m new to PCP’s, have looked at several tuning videos and have experimented with the various adjustments to see what they do. I think I have a good setup for my gun and this pellet, but have no idea if that’s true. So I’d appreciate a critique, especially from other Impact M4 shooters. I...

I have this scope mounted on an FX Impact M4 Sniper .22 cal. It will not record either normal videos or RAV's (recoil activated video). When I try to record a video, the red icon displays in the upper left corner of the viewfinder but the counter that's supposed to show up in the lower right...

I'm trying to fill my new FX Impact M4 Sniper. The parts list includes a dust cap and a quick disconnect female. I didn't receive either of these parts. Did FX stop including these items with the new M4's? My compressor disconnect is about 19mm diameter but the recess in the gun is only about...

A compressor or a scuba tank? I can get a new 80 cuft scuba tank for around $300, a used one that's certified for around $200. A fill will cost less than $20 at a scuba shop, and I'd get the cleanest air possible. 80 cuft = 2,265,348 cc. My gun has a 580 cc tank so I could get about 3,900...

I'd like to understand some of the entries when entering a profile on this scope. Can someone explain Drag function, Ballistic coefficient and Sight height? Is sight height the perpendicular dimension from center of bore to center of optics? I'll be using this scope on an FX Impact M4 Sniper...

I'm trying to understand how one picks the initial FPS to tune to, particularly .22 pellets. Is there a pickoff chart anywhere that shows the relationship between weight and best velocity?

I just watched this tuning video which I found to be the best so far for tuning an FX Impact. However, he doesn't explain how he determined the original FPS he was trying to achieve. So how do you pick a starting FPS to tune to? Thanks

I'm trying to understand what the point of "tuning" is? At the top level it seems it's all about accuracy... trying to get the best groupings for a particular projectile. So you shoot a few rounds, watch the chronograph and keep changing pressure/fps to get the best groups. Is this what it's...