Wingmann Posted June 24, 2010 Report Share Posted June 24, 2010 Hey, so before i go out and buy the gun and everything, could you guys please confirm that the following setup will be fine / wont have any flaws? RoF upgrades: MOSFET Prometheus hard piston The MOSFET shouldn't be a problem. Can't tell about the piston. Accuracy upgrades:Prometheus TBB (either 363 or 285mm) New H-nub (Madbull or Element?) Guarder clear bucking The TBB will rise your FPS, other than that they are harmless (except if you are in front of the gun ) Quote Link to post Share on other sites
G0LF K4RT Posted June 24, 2010 Report Share Posted June 24, 2010 The MOSFET shouldn't be a problem. Can't tell about the piston. The TBB will rise your FPS, other than that they are harmless (except if you are in front of the gun ) ok thanks. earlier in the thread people were saying that the stock piston gets shredded in under 10,000 rounds using a 11.1v so i figured it would have to be replaced, and prometheus is generally pretty good Quote Link to post Share on other sites
Wingmann Posted June 24, 2010 Report Share Posted June 24, 2010 ok thanks. earlier in the thread people were saying that the stock piston gets shredded in under 10,000 rounds using a 11.1v so i figured it would have to be replaced, and prometheus is generally pretty good The G&P polyacetal piston is also said to be good... In any case I'd wait until it breaks There's always time to get a new one. Quote Link to post Share on other sites
SuX0rz Posted June 28, 2010 Report Share Posted June 28, 2010 (edited) Just skirmished the gun for the first time. I was noticing though that some bbs aren't traveling as far as they should. Some shoot with force and some do not, and I've been getting some jamming as well. Is this the motor hight problem? I'm using MAG magazines and the gun is unmodified. I thought maybe it was the hop up, or the mags, but perhaps the motor hight? If it is the motor, how to I adjust the hight? I'm a n00b so go easy on me. Edited June 28, 2010 by SuX0rz Quote Link to post Share on other sites
hwagan Posted June 28, 2010 Report Share Posted June 28, 2010 My guess is the MAG magazines; They're known to sit funny in the magwell and push the hop away from the nozzle, leading to air-leaks and feeding problems. What brand of BB's are you using? Does the problem occur with the original G&P mag? Quote Link to post Share on other sites
Wingmann Posted June 28, 2010 Report Share Posted June 28, 2010 (edited) Check that your hop-up chamber has got the spring. Mine and some other units didn't have it and it helps keeping the chamber against the gearbox. That paired with the loose MAG magazines "can" lead to poor air sealing. This is a chamber with the top spring installed I'll take some pics of my MAGs later this week to show you what I added to them so they are flush with the front of the magwell. Edited June 28, 2010 by Wingmann Quote Link to post Share on other sites
harborne blue Posted June 28, 2010 Report Share Posted June 28, 2010 I've had loads of problems with MAG mid-caps. They FUBAR'ed my SCAR's feed tube and I don't trust them anymore to the point of binning all ten. For the G&P Sentry (just ordered), I'm going to have to dig out the metal mid-caps until the PMAGs arrive. Quote Link to post Share on other sites
Wingmann Posted June 28, 2010 Report Share Posted June 28, 2010 I bought two M-version ones and found 6 used PMAGs with ranger plates, so I guess I'm set in that respect Still keeping 3 MAGs to see if I can solve the problem and then pass on the info. Quote Link to post Share on other sites
SuX0rz Posted June 28, 2010 Report Share Posted June 28, 2010 Thanks for the help. The MAG mags are a little loose in the magwell, but the problem has happened with the G&P mag as well. I have been using TSD bbs from Airsoftgi. I'm going to look at the hop up today, I'll check for the spring. I thought about ordering some EMAGs to see if that would solve the problem. Quote Link to post Share on other sites
SuX0rz Posted June 28, 2010 Report Share Posted June 28, 2010 (edited) Alright, I did some testing with my buddy's magazines and I now am convinced that it is my MAGs. I used his PMAG Ms and the stock mag that came with his SOCOM gear M4 and I had no problems at all. Every bbs flew as it should. I'm a bit bummed since I bought a box of the MAGs. I was thinking though about tapping the upper part of the MAGs to see if that helped with the feeding issues. Edited June 29, 2010 by SuX0rz Quote Link to post Share on other sites
hwagan Posted June 29, 2010 Report Share Posted June 29, 2010 I'm almost certain they can be modified to work - I believe Wingmann might have done so. Hopefully he'll get some pictures up to illustrate, but try a quick search on the forums as i'm sure there's been a guide on how to do so.. I just can't find it! Quote Link to post Share on other sites
Wingmann Posted June 29, 2010 Report Share Posted June 29, 2010 I'll try to post some pictures tomorrow Wednesday. Quote Link to post Share on other sites
harborne blue Posted June 30, 2010 Report Share Posted June 30, 2010 My Sentry just arrived But how do you fit batteries into the darn stock? I have some 8.4 mini crane batts but how do you get the things in? Quote Link to post Share on other sites
hwagan Posted July 1, 2010 Report Share Posted July 1, 2010 Undo the 4 screws and nuts on the modstock - You then need to poke one of the 2 battery sticks through the middle of the stock, slide both sticks into both tubes, re-attach the tubes, slide the stock onto the buffer tube, take off the rubber buttpad and then connect the batteries. Or, buy some 7.4 lipo sticks Quote Link to post Share on other sites
Wingmann Posted July 1, 2010 Report Share Posted July 1, 2010 (edited) Here is a MAG with the foam sticker This is how the magazine should face the nozzle above and align with the mag well front Edited July 1, 2010 by Wingmann Quote Link to post Share on other sites
bladerunner168 Posted July 1, 2010 Report Share Posted July 1, 2010 That's actually pretty clever Wingmann I might try these with my KA hicap PMAGS, there's more than its fair share of give in the magwell with a mag inserted. Whilst at a training event last weekend, the feeding was not reliable at times Quote Link to post Share on other sites
hwagan Posted July 1, 2010 Report Share Posted July 1, 2010 Are you winding them fully til they click on the ratchet? They seem to require a LOT of winding before you get the click, and they'll then empty about 250 rounds before a load more winding gets the last 70 or so out. Quote Link to post Share on other sites
bladerunner168 Posted July 1, 2010 Report Share Posted July 1, 2010 The winding issue I have noticed too, seems like you need to wind it until you hear this grinding type noise Quote Link to post Share on other sites
hwagan Posted July 1, 2010 Report Share Posted July 1, 2010 Yep, that's pretty much the story! I'd say wrap a single layer of electrical tape around the top of the mag, that should stop the wobble a little and make sure they feed okay. Quote Link to post Share on other sites
bladerunner168 Posted July 2, 2010 Report Share Posted July 2, 2010 Yep, that's pretty much the story! I'd say wrap a single layer of electrical tape around the top of the mag, that should stop the wobble a little and make sure they feed okay. yep, done that last night, now they're pretty solid, cheers Quote Link to post Share on other sites
hwagan Posted July 2, 2010 Report Share Posted July 2, 2010 (edited) Ignore this, posted in the wrong thread... Edited July 2, 2010 by hwagan Quote Link to post Share on other sites
harborne blue Posted July 6, 2010 Report Share Posted July 6, 2010 yep, done that last night, now they're pretty solid, cheers I'll have to try this. Took my Sentry out for the first time at the weekend and the only problem was that it didn't like the ACM hi-caps. But WOW! What a gun - compressed the spring for 48 hours and she chrono'd at 340-350fps and shot like a dream. Amazingly accurate, loooong range and what a ROF - I was only using 8.4v minis and this was roaring along. Quote Link to post Share on other sites
SuX0rz Posted July 7, 2010 Report Share Posted July 7, 2010 I used a piece of electrical tape around the top of each of my MAG midcaps and it helped the feeding quite a bit. I still think I need to tweak it a little but thankfully they are worth keeping now. I also have some EMAGs coming. Heard that they work well with the Sentry. Quote Link to post Share on other sites
Wingmann Posted July 8, 2010 Report Share Posted July 8, 2010 (edited) You can also try to bend outwards a bit the catch window on the mag. I used a big flat screwdriver and just pulled them out a bit so the top sticks out over the plastic. It heps keeping the MAGs up in the well and provides a more solid graps for the catch. Some macro goodness because a picture is worth a thousand words And my main body of mags as of now Edited July 8, 2010 by Wingmann Quote Link to post Share on other sites
ST6-DEVGRU Posted July 10, 2010 Report Share Posted July 10, 2010 Thanks for the post, i definitely will be picking one of these up from ehobbyasia.com, as long as a new hop up a tight-bore barrel, again thanks for the review it really pushed my decision into purchasing this rifle. Quote Link to post Share on other sites
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