renegadecow Posted February 22, 2016 Report Share Posted February 22, 2016 RA-Tech steel parts shooting vid. Was waiting for the hop up to explode into a million pieces but surprisingly didn't. I WONDER WHY. https://m.youtube.com/watch?v=qljXP3sN1FE Quote Link to post Share on other sites
CaptCalvin Posted February 22, 2016 Report Share Posted February 22, 2016 Seems to be all better now...for the moment at least. As said above, O-ring between tank halves is mighty thin. I added some automotive gasket maker around the seam and let it set up per the instructions. I added gas from a magazine before reassembly and no hissing was heard. Put gun back together and fired through a magazine in full auto bursts--no hissing. I then removed the magazine and fired the gun while holding down the disconnector. Oddly enough I only got three semi shots out of the reservoir. Before, I was able to shoot well over a dozen...Will have to keep an eye on it I guess. As far as disassembly and reassembly, no problems encountered. The one fiddly bit, which is no biggie really, is the plastic fire selector nubbin. It is held down weakly, which can allow it to slip fully up into the selector switch. If this happens, it will be obvious--the switch can't be changed from one setting to another, and the body halves won't fit together. Otherwise, to open it up is really quite easy. Thanks for the input/help! It depends on how much gas enters the reservoir in liquid form. RA-Tech steel parts shooting vid. Was waiting for the hop up to explode into a million pieces but surprisingly didn't. I WONDER WHY. Always some excuse with these demonstration videos huh? It's always either the room is cold or forgot to top off the gas. Also full auto "magdumps" with clearly downloaded magazines. And now "forgot to turn on bolt stop function." Smh... 1 Quote Link to post Share on other sites
machgo Posted February 24, 2016 Report Share Posted February 24, 2016 That video was disappointing because a replacement bolt lock or stop is much needed. Mine broke, predictably, but it's a bummer just the same. Going to go the home made route after I source some suitable material--nylon I think. How have the home made bolt stops been doing? Had a magazine output valve start leaking, but some heavy grease seems to have fixed that, at least temporarily. On the plus side, the manual lists the O-ring sizes. I didn't have any, but I probably could have sourced some if I had needed to... Quote Link to post Share on other sites
renegadecow Posted February 24, 2016 Report Share Posted February 24, 2016 On the nylon one I made it's seen about 1,500-2,000 rounds. I always run with the bolt stop function on, but can't count how many times it's been used so presume devided by 50. Quote Link to post Share on other sites
bankz5152 Posted March 6, 2016 Report Share Posted March 6, 2016 Used my P90 for the first time yesterday. Even with 2 - 3 degree cold, hail and frickin snow it performed excellently. Minimal cooldown, locked back every time. Range suffered a tad though Over all very happy! on my phone, my spelling will suck Quote Link to post Share on other sites
Zereck Posted March 6, 2016 Report Share Posted March 6, 2016 I installed an Angry gun inner barrel(old style cut) and tried a Maple Leaf and Modify rubber. With both rubbers I get usually good results on WE/TM guns but on this gun it randomly does too much/less hop-up. Anyone with similar issues? Quote Link to post Share on other sites
renegadecow Posted March 7, 2016 Report Share Posted March 7, 2016 Are you using the stock nub? On mine it was a little short and had plenty of sideways play in the channel for it in the hop chamber. This plus the fact that it's a solid nub can mean drastically different hop characteristics if not installed the same orientation every time. I ended up replacing it with a longer one. Quote Link to post Share on other sites
bankz5152 Posted March 7, 2016 Report Share Posted March 7, 2016 Hmm. I fitted a Falcon grey now which seems to fit perfectly and adjust properly even with the standard barrel on my phone, my spelling will suck Quote Link to post Share on other sites
bankz5152 Posted March 7, 2016 Report Share Posted March 7, 2016 Just read on FB RA-Tech have confirmed metal upper for the P90, no idea which upper though... Quote Link to post Share on other sites
renegadecow Posted March 7, 2016 Report Share Posted March 7, 2016 I remember them showing CAD drawings of a TR upper. Quote Link to post Share on other sites
rusTORK Posted March 7, 2016 Report Share Posted March 7, 2016 I remember them showing CAD drawings of a TR upper. That's why i working on Standard Upper. =) Somehow, they don't want to make both. Quote Link to post Share on other sites
bankz5152 Posted March 7, 2016 Report Share Posted March 7, 2016 What *albatrosses*! Got to take a look at my mates P90 tonight, bought the same time as mine and fired roughly the same amount of rounds. Though its stopped feeding.... Insert a fully loaded, fully gas mag, cock it and nothing or itll fire a round or 2 at very low power. Quote Link to post Share on other sites
Habakure Posted March 7, 2016 Report Share Posted March 7, 2016 Cracked reservoir? Quote Link to post Share on other sites
bankz5152 Posted March 7, 2016 Report Share Posted March 7, 2016 Just checked it again seems to be fine! Must have just been ice cold on my phone, my spelling will suck Quote Link to post Share on other sites
renegadecow Posted March 8, 2016 Report Share Posted March 8, 2016 Extruded valve o-ring? Quote Link to post Share on other sites
bankz5152 Posted March 8, 2016 Report Share Posted March 8, 2016 Put 4mags through it with no issues at all, chocking it down to the cold. It was about 2c and hailing on my phone, my spelling will suck Quote Link to post Share on other sites
bankz5152 Posted March 9, 2016 Report Share Posted March 9, 2016 (edited) Just installed a Maple Leaf 60 degree & a flat nub into my P90 with the standard barrel. Pretty impressed, range has improved as has accuracy Also anyone think you can up the ROF by adding a spring or buffer behind the bolt? on my phone, my spelling will suck Edited March 9, 2016 by bankz5152 Quote Link to post Share on other sites
CaptCalvin Posted March 9, 2016 Report Share Posted March 9, 2016 (edited) Haha surprised you don't find it fast enough already. I guess one simple way would be to not play in the freezing cold... but to increase the inherent ROF I guess you can thicken the preexisting buffer found inside the back of the stock. Haha surprised you don't find it fast enough already. I guess one simple way would be to not play in the freezing cold... but to increase the inherent ROF I guess you can thicken the preexisting buffer found inside the back of the stock. Edited March 9, 2016 by CaptCalvin Quote Link to post Share on other sites
Habakure Posted March 10, 2016 Report Share Posted March 10, 2016 So quote your self then copy and paste said quote, as well, instead of just saying thicken the buffer? Would have been quicker. . . Quote Link to post Share on other sites
CaptCalvin Posted March 10, 2016 Report Share Posted March 10, 2016 So quote your self then copy and paste said quote, as well, instead of just saying thicken the buffer? Would have been quicker. . . Doh! No idea how that happened. Was on my phone and saw a grammatical mistake I wanted to correct in my post. Only now did I realized what I'd done. Quote Link to post Share on other sites
Habakure Posted March 10, 2016 Report Share Posted March 10, 2016 I'm kind of impressed now. You managed to quote your self in the very post you were typing. Quote Link to post Share on other sites
bankz5152 Posted March 10, 2016 Report Share Posted March 10, 2016 Plenty fast enough as is, more of a general wonderment/engineering exercise. Quote Link to post Share on other sites
renegadecow Posted March 10, 2016 Report Share Posted March 10, 2016 There's a good 1 to 1-1/2" of bolt travel you can short stroke. Then there's the aluminum bolt. 2 Quote Link to post Share on other sites
bankz5152 Posted March 10, 2016 Report Share Posted March 10, 2016 Thought so may have a tinker.... on my phone, my spelling will suck Quote Link to post Share on other sites
Zereck Posted March 11, 2016 Report Share Posted March 11, 2016 So I tried multiple barrels, hop-up rubbers and nubs and still got the same results, so I chronod a whole mag down. Most of the shots were around 345-360 but then there were some random spikes: 310, 380, 390 etc. Nozzle seems fine, I hope it's not the inner tank's valve fault. Quote Link to post Share on other sites
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