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||Five-Seven USG (6mm)
I have never had any prior experience with a gas pistol that wasn't a KSC, I knew when I made the purchase it would be a pretty big risk. And by all means the odds were against me with it being a company I wan't familiar with, and a new type of gun. But really it shouldn't have been too hard to make the gun better than this.
HASSLES: (for me any way)
I've now owned the gun for a little over a month and have put about 100-200 rounds through it. However it was a hassle right from the start. I knew it used HFC134a and was willing to overlook this minor annoyance for the fact that it was an airsoft FiveSeven. HFC134a is impossible to find in the area I'm in. In fact green gas is fairly hard to find as well (now that the only airsoft shop is closed). After spending an extra 30 bucks on redwolf for the gas, I took it for it's first test run.
The first thing I noticed, upon loading the clip was that the bbs in the mag were getting dirty from some oil in there. I presumed this to be a mixture of silicone oil and dirt. So I tried my best to clean it out, and replaced the oil with my own. It just worried me a little. The next thing abut the clip is that it actually holds LESS ammo than the real thing. I know the 6mm bbs are larger in diameter than the 5.7mm bullets, so there wasn't much room to work with. But Marushin COULD have made the magazine a double stack with minimal effort. Putting gas in the mag is just standard procedure. Nothing odd about it.
We have a cronograph that me and a neighbor pitched in for. the first shot, was 190 fps. this was very discouraging as the box and Redwolf said it was closer to 240. However, the next few shots ranged anywhere in between 170-235 fps. it was the most inconsistent gun we had ever fired. After about six shots the slide locked up and all the remaining gas was resleased in a big whoosh. I hoped this was a fluke. tried once more and the same thing happened.
We decided to take the gun down. I noticed right away a loose spring in the back of the gun near the hammer. I assume this is an anti reversal spring of some sort (looks similar to the one in my AEG, just tiny). I tensioned the spring onto its peg and went back to firing. The FPS was still within the above range and very inconsistent. this time the slide didn't lock up but the gas was still being expelled.
We took out the magazine and found the valve frozen in the open position. After six rapid shots the valve had already frozen. This was kind of the final straw. I now officially hated marushin for tempting me with this beautiful peice of garbage.
Anyway, accuracy is also shoddy. sometimes shoots way up and smetimes curves off to the left or right. my 20 dollar spring desert eagle is more accurate than this, although it doesn't shoot as far.
litterally lasted me 10 minutes. Now there are two bbs lodged permanently in the hop up. I tried a ram rod, I tried pulling them out with needle nose pliers. I tried lubing it and repeating with no success. When I pull or push on the bbs the hop up looks as if it is ripping out of the gun. My $140 peice of junk is now a wall hanger.
Wait for the KSC to buy a fiveseven, but I can assure you, I've been soured to it forever.