ModernTimes

It seems even if I change the BB weight on the chrono, the Joules changes but the FPS remains the same. Seems a reading of 310 - 317 FPS with 0.23g BB. Is there any other precautions I should take or anything I should add? I'm pretty happy with it. Just maintenance left now.

Thanks for this, I'll check it out. How is the Joules calculated in the chronos? Does it use the weight to calculate this? I was under the assumption that weight of BBs was only used in calculating the FPS. My chrono is set to 0.2g BBs and I am testing with 0.23g BBs. Getting a reading of 310 FPS. And before you ask, I can't change the weight because its a chinese cheap model.

I put the tube back on and this time the spring was fine. 304 - 316 FPS with 0.23g bbs and M115 spring. Update: 310 FPS average. 0.91J

I assemble the gun in its core parts. Motor, grip, barrel, battery, spring, everything. Then I test. Its the entire gun without the cosmetics like stock, outer barrel, etc attached. Everything else is there. Then I fire it auto/semi and it shoots but then the spring inside bends and I can't shoot anymore. I look at the back part which you use to push the spring into the gearbox and this thing is slightly sideways. I take out the spring, the spring is bent slightly sideways, it also has wear marks on the bend. You need that thing? I tested it without. But it doesn't weeble-wobble, it more kabooms and no longer works. For context the spring I have is the M90 stock. The replacement which bends is the M115.

Update 1: The lubing worked great. The results for the air seal are now very consistent. Its now a solid 0.770J. With a variantion of each shot of 6+- FPS. I replaced the spring to the more powerful spring and this took me to a whopping 320 FPS with 0.961J however problem is that the spring bends mid shots. Any idea on how to solve this? Its clear I need a better spring now. Should I just go for a spring below the one I have now? Actually, reading back now. I might opt to improve the air seal more and work on that. Update 2: Lubed up the piston. Found out through another video that piston is actually losing a decent amount of air. Going to buy a new piston set. I can hear air escaping through this when I do a seal test. It also moves way too much around to maintain good seal even with the lubricant.

I noticed the original air nozzle is quite bad with no rubber rings inside so I bought a replacement. The issue looks to be the connection between the air nozzle, cylinder head and hop up rubber so I'll just replace this, grease up parts of hop rubber area and do some more testing. Is there any areas in particular I should ensure I grease?

Airseal is horrific. Its almost non-existent so will debug this further. Thanks for the tip. My idea thus far is maybe the piston is causing the issues. Update (17:00) Join between piston and the barrel itself is the cause.

After replacing the spring from the default M90 to the M105 the past 8 readings are: 295.8 302.9 300.2 306.4 303.3 308.4 446.5 303.3 I'm pretty certain I have put it on properly, I verified multiple times and its aligned with the line on the barrel and placed the correct way up. I've not ordered a new barrel yet no. Was hoping to avoid this. To add onto this, the bb weight is 0.23g so for outdoor play, an ideal 0.28g is giving me 274FPS. I want to reach 350FPS as much as possible.

Update: Added bucking and nub but not much difference. Measured 0.23g BBs 284 FPS. Any idea what the issue could be? It is also with the dragon motor and a MOSFET now installed.

I'll post a comparison once the starter upgrades are complete.

Will purchase one later today. Currently have 7.4v's. Aren't they expensive? I have also read online that the stock one is good and the upgrade would be as minimal as changing the barrel. I already made the purchase years ago so I will try it out anyways. Perun AB++ is £48.00 so want to avoid if I can to keep costs low. Ordered. On its way already. Ordered. On its way already too. You recommended me this 2 years ago haha. I'll do some testing to see the difference once the chrono arrives.

After changing my motor and spring I realised I messed up and did some stupid upgrades because I thought bigger spring bigger motor means better but it doesn't. I'm back to correct the problems now that summer is coming but I need some advice first. I have a SA-C08 CORE and I am in the process of installing a X-ASR MOSFET. This is ongoing right now so this is where I am. I'm looking for a higher rate of fire, faster trigger response time and further distance shooting within limits. What are upgrades I can do that would give me the best bang for the buck to get what I want?

Really good idea. I didn't call the police to inform them because even though that sounds like a good idea, you know how the police is and if you mention anything related to a gun they'd probably start panicking and send a unit just in case. I'll just do this and tell my closest neighbours either side of my house.

I need a place to test shoot my gun for some modifications I am making and I don't want to damage anything in the house so the best area to do the testing is the garden however I'm unsure of how my neighbours would respond. Last thing I want is a armed unit called to my address. I thought about wrapping the RIF in a bag or hiding it in a bunker style thing but I feel like it would just cause even more suspicion that I'm doing something illegal/bad or shooting an actual gun. What is the law like in the UK? My RIF is fully blacked out and I do not have a defence at the moment since I have not been enough times. Do I inform the police of it? Do I go ahead and just shoot it in the garden like a normal daily activity? My initial idea was to call the cops and tell them so that if anyone calls they know what's going on.

I just recently swapped my stock motor out from my Specna Arms SA-C08 CORE™ Carbine AEG for a Big Dragon M140 and it has given me an increased rate of fire along with what feels like slightly more power. I am still learning and researching into installing a MOSFET since it requires soldering work but that is an upgrade I will also be doing. Both of these upgrades along with getting 11.1v batteries were suggested in a past post from @Rogerborg so thank you for the advice. As for these upgrades I am doing, is there anything I should be aware of?