NathyB Posted March 11, 2018 Share Posted March 11, 2018 So my Krytac shoots about 293fps stock I put a guarder m100 Spring in and it took it up to 380fps I now have a sp90 Spring does any one else have this spring installed in a Krytac crb and can confirm the fps before I strip the gun, cheers Link to comment Share on other sites More sharing options...
MemeySwagLord Posted March 12, 2018 Share Posted March 12, 2018 Not sure about your question, but I hope you realise that since a Krytac CRB has automatic capability, you actually own a firearm at this point. Under the VCRA, after it has passed around (330, 340?) if it hasn’t been restricted to semi-automatic only, it’s a firearm. Link to comment Share on other sites More sharing options...
Guest Posted March 12, 2018 Share Posted March 12, 2018 It’s actually a measure of Joules, for the UK only, its 1.3 joules or approx 370fps on 0.2 bb’s Link to comment Share on other sites More sharing options...
snuff Posted March 12, 2018 Share Posted March 12, 2018 Krytac uk on facebook would be able to help.. Link to comment Share on other sites More sharing options...
MemeySwagLord Posted March 12, 2018 Share Posted March 12, 2018 Rocket, cheers for the correction. In any case, 380 > 370, therefore firearm Link to comment Share on other sites More sharing options...
LightningCh Posted March 12, 2018 Share Posted March 12, 2018 Just strip the gun and test it lol. Best way to figure out whether it will work. Link to comment Share on other sites More sharing options...
Whompa73 Posted March 12, 2018 Share Posted March 12, 2018 On 11/03/2018 at 9:35 AM, NathyB said: So my Krytac shoots about 293fps stock I put a guarder m100 Spring in and it took it up to 380fps I now have a sp90 Spring does any one else have this spring installed in a Krytac crb and can confirm the fps before I strip the gun, cheers Are you trying to run with an 11.1 lipo?? If so try a 7.4 and see if that helps. I run a m105 in my lvoa a its slightly hot 355 to 365 with the 11.1 not yet tryed with a 7.4 but on my aps it can make a 20fps diffrence. I going to clip the spring anyway as i want it site legal and want the extra rof that comes with the 11.1 Link to comment Share on other sites More sharing options...
Supporters ImTriggerHappy Posted March 12, 2018 Supporters Share Posted March 12, 2018 Battery makes no difference to fps. Every gun is different even those from the same manufacturer just fit the spring and see. Those figures on the m100 are a little high though which makes me think something is not right. Link to comment Share on other sites More sharing options...
Whompa73 Posted March 13, 2018 Share Posted March 13, 2018 8 hours ago, ImTriggerHappy said: Battery makes no difference to fps. Every gun is different even those from the same manufacturer just fit the spring and see. Those figures on the m100 are a little high though which makes me think something is not right. Battery should not make a diffrence i agree . Yet i have found that it can . Wether its due to the quicker compression and release of spring i dont know. Link to comment Share on other sites More sharing options...
Supporters Sitting Duck Posted March 13, 2018 Supporters Share Posted March 13, 2018 41 minutes ago, Whompa73 said: Battery should not make a diffrence i agree . Yet i have found that it can . Wether its due to the quicker compression and release of spring i dont know. Nah...... Think you would have to have the gun cycling at say 100rps Vs Stalling mid cycle and ultra slowly crawling to slip of last tooth on release THEN you "might" have say 1mm max difference on spring compression/release Taking one tooth when Short Stroking as say a max of 15fps per tooth (maybe 12-13fps) a 1mm spring compression difference would equate to say 4 fps tops BUT TBH this is going some to get this variation of spring compression most likly just a bit of random luck/slack in drive chain or wear gives a fly's pubic hair variation Plus you get variation of 5 to 10 fps anyway between shot after shot minor imperfections in bb's exact weight, slight imperfect seal on bucking lips etc.... The biggest variation in fps is to do with a leak, say sealing on bucking lips (softer buckings blow on higher fps) But often if isn't bucking seal or torn/damaged bucking etc.... One of biggest areas is piston o-ring losing 30fps or more Or a bad leak/loose cylinder head etc.... Speed will not alter the fps - loads of other factors will lack of good compression and ultra great seals is where nearly all energy is lost No point putting in a m110 - m120 spring to compensate for $hit seals stuff just works harder and runs warmer/slower to make up for inefficiency elsewhere If you got a drop fps it will very very likely be down to three things.... Piston O-ring crap seal Torn/damaged bucking Extremely worn/faded spring (though you would have to stupidly leave it pre-cocked for a while in general) Stuff usually wears & not improves over time like fine wines Careful of grease you use for o-rings, many eat up rubber o-rings So a couple months later your o-ring will no longer seal well Other than that, a part failure or bad assembly will cause a drop in fps Or really daft thing to ensure your chrono-ing with 0.20's and not 0.25's (just make sure you are reading 300fps on 0.20's not 0.25's) If your APS varies 20fps that is a seal issue the o-ring could get warmer cycling faster from still but should after a few shots start to seal better the warmth will help the o-ring expand & seal better increasing fps BUT in reality that increase is down to $hit seal to begin with Do a load of compression tests and you get so-so compression often but after a few tests/pumps it improves a little Really what you want is great compression to begin with in the first place It is something not always easy to attain straight away You can get a good cylinder/piston/piston o-ring within a few attempts Or you can spend ages messing around with combos especially in piston head & o-ring Some piston heads are just complete crap and believe it or not some cheapo stock piston heads are very good if you set it up with good o-ring bought a number of piston heads and quite a few were pretty crap or worse than some stock (G&G is the exception, very rarely have I got really great seals on G&G piston heads) But some china guns, the piston heads are quite good if you just replace the o-ring (often china guns will over volume a smidge with crap o-ring seals to compensate) Getting good compression is vital, and using stuff like synthetic super lube is a must Other grease will quickly rob you of fps when o-ring gets perished by wrong grease Link to comment Share on other sites More sharing options...
NathyB Posted March 13, 2018 Author Share Posted March 13, 2018 On 12 March 2018 at 8:28 AM, MemeySwagLord said: Not sure about your question, but I hope you realise that since a Krytac CRB has automatic capability, you actually own a firearm at this point. Under the VCRA, after it has passed around (330, 340?) if it hasn’t been restricted to semi-automatic only, it’s a firearm. I swapped the spring back to stock once I realised it Was to high Link to comment Share on other sites More sharing options...
LightningCh Posted March 13, 2018 Share Posted March 13, 2018 14 hours ago, Sitting Duck said: Snip One of biggest areas is piston o-ring losing 30fps or more Or a bad leak/loose cylinder head etc.... Snip Agreed, this goes back to my Krytac experience mentioned in this other thread... 1 o ring change jumped my fps from 300 to 340+ lol. Link to comment Share on other sites More sharing options...
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