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Lucky for me me when i replaced the oring and re-pressurised the M3, nothing went wrong, its been several hours now and no loss of pressure so all good.

So i copied what someone on this forum did and i placed one of those round little pastey stickers that you get with the shoot and see targets, i placed it over the end of the valve in the magazine port on the M3, i fired a shot and off it came, so i will now change this oring.

I replaced the breech oring and the two orings on the barrel already, as far as i can tell from looking on YouTube, the only other places to look at are the valve rod oring, i will replace it and see what happens.

After a little more research i think it may well be the small oring on the end of the valve rod, seems to be a common occurrence so i will order a new one in the morning along with a few others.

Hi all. I own a Fx impact M3 in .25cal, i have it tuned to shoot 39g slugs at 960fps, i have used the same tune since june 2021, everything internally is stock, Airmarksman backbone rail fitted,saber tactical front rail fitted etc. Recently i have noticed it sounds louder at the breech end, i...

Lovely airgun, my late father bought me one for my 16th birthday in 1995, a .22 sub 12 model, i really regret swapping it for a 12 bore over and under a few years later! Idiot move.

Since upping the first reg pressure so far so good the second reg refilling quicker now ,i have thought of fitting a gen 3 huma reg to replace the M3 s second reg but i want to see how things fair with this increased pressure .

So i upped the front reg pressure to 190 bar and the second reg to 160 and now its working wonderfully! Quick plenum refills and the consistancy is straight away better, i took it out at 100 yards and it was grouping well under a inch so all good.

When you say bypassed, do you mean you removed it entirely?

I will look tonight as i have not actually took it apart yet but my first port of call will be turning the first reg up.

Hey everyone, i use a M3 in .25cal first reg at 175bar , second at 155 bar and use 41g slugs at 960-965fps on power setting 16 and for 33.95g king heavy mk2s at about 960fps i use power setting 10. Last night i was doing some chrono testing and i noticed the velocity would jump 10-15 fps...

Yes i have physically maxed out the hammer preload to the point that the power wheel wont turn so i backed it off the hammer spring grub screw a bit.

So on power setting 23 with the hammer spring tension nearly maxed out i am getting 900fps with the reg at 150bar, i think i may fit a gen 3 huma reg that a friend kindly gave me and see what i can get with a higher reg pressure, i was thinking 70ftlbs would be the crowns upper limit? I also...

Thanks for your reply, everything on my crown is currently stock, i do have a slug power kit but took it out because i wanted tp see what i was getting accuracy wise ( and power)whilst the crown is stock standard. So far the only slugs that give me anything like the accuracy i require ( 0.5 inch...

I have one but currently trying to see what things are like when the crown is stock and not fitted with the slug kit.

Hi all. Just wondering with all thats available for tuning a fx crown mk2 ( tungsten hammer weight etc), what is a safe amount of power that it could be tuned to before any damage could occur due to excessive forces? I have found that 36.2g NSA slugs to be the most accurate at 875fps out of my...

Excellent , thanks for sharing this! Im going to get my friend to print these out.

It needed heating a little but all good, cheers.

Yep, that was the problem, i just tweeked the safety set screw on the trigger and now its all sorted.

Hi all. My fx crown mk2 has just decided it wants to fire with the safety catch on, has anyone experienced this before? Anyone got a solution for this before i take it back to the gunshop and wait a 4-6 week turnaround ( quoted by the fx techs).