I've used the KA p90 Tactical, not the ultragrade, since december of '14.
First gun I have ever owned and after handling a CA, and a G&G and a TM I would pick this one over any of the others.
First off, you need a metal reciever to balance out the gearbox in terms of weight. I just bought a CA p90 with plastic upper (for the gearbox) and just holding this thing is wrong. The KA P90 tacical has a body that is not the cheap plastic that all the others i have held are made of. it looks and feels different, a little bit grainier which is nice for handling.
It comes stock with a 9mm gear box and a 130 spring. stock was 395fps consistently. After the winter I had to replace the full piston after the plastic parts either chipped or literally exploded. It jumped to 410fps and ive weakened the spring down to 398fps. the quick change spring is something I think I will require in all my future guns, because when I make a trip to the big smoke for some indoor I can swap springs on the fly. Also it makes the gearbox easy to open.
My gearbox is pristine other than the piston and head.
With .28g it out shoots anything in the woods, short of a sniper.
Stock hop up can reach out 100+ feet, If you are using this for anything but the vanguard or shock trooper role, you might want a different gun.
If I call a "no hit caller" there is no question that I hit you, and my local refs know it.
Everyone laughs at a 6' 320 pound man with a tiny gun in the morning.
By the end of the day, they only have respect for this beast.
I would say you never need an extended barrel, unless you want a speed build while trying for higher fps on a lower spring.
Before you ever buy one, hold it in store. And not just once, the common consensus is that you either Love it or hate it, there is no in between.
Also this gun is terrible for shooting over bunkers. because the sight is so High from the barrel, I need to expose past my shoulders to make accurate shots. But indoors, or narrow places it is invaluable and you don't need to leave space in front of you to get the gun through or around stuff. Also it is so well balanced you can easily one hand it, while holding another p90 or pistol. It. Is. Awesome.
I use ka 100 round mags, never had any problems with them. Light damage to the lip around the feed hole, when doing the p90 slap when the mag is not aligned properly will cause it to chip. This does not affect performance, just have to be careful while filling or else your loader might slip.
I see suggestions for pouches, I use 2 ESKI double p90/ump pouches. they have flaps, but I just tuck them in for the open top look and easy pull out. The pouches are loose enough that the mags slide in an out easily, but because they are so long, they will never fall out. Unless you are hanging upside down...maybe...
Without some stretching, CONDOR pouches didn't even really fit the mags, and when I almost ripped one in the store, it was still really tight.
I would say only buy the King Arms tactical. If you were going for anything else, metal receiver and a quick change spring are a must.
Final note to Short Round, Thank you for this guide, It was invaluable to me when I was starting out and looking at the different p90s. I've been waiting to reply to this threat until I worked her in a bit. Feel free to update the thread with anything I've said above.
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