Hey guys, I’m new to this board so I thought I would say a few things about my 1077 and what I have done to it.
First of, I have had this thing for years and the stamp on my gun says it’s from 94... I know they made a newer version of this gun in 99, I don’t know what the differences are.
I haven’t shot my 1077 much until recently since a friend of mine had some rodent troubles in his back yard, he got a .20 cal Benjamin that’s pretty damn powerful. It was a lot of fun shooting that gun, so I decided to bring over my old 1077 to pink some targets. Years ago, I also had an AutoAirII pistol, and when I wanted more power out of my 1077, I moved the shorter, stronger spring on the hammer from that pistol to my 1077. This up’ed the power a little, the first few shots out of a fresh CO2 were great! After that mod, the gun actually had recoil you could feel. The problem was that I could only get about 12 good shots out of the gun after that. So recently, because I have a lot of paintball equipment around, I adapted the gun to accept paintball tanks. Right now, I have a 12oz tank on it. I don’t know how many shots I can get out of it yet because the tank wasn’t all the way full when I shot it, but so far, it’s pretty awesome. I can really get my scope sighted in because the gun is now way more consistent. I’m still tweaking it though; a lot of liquid co2 is going through the gun right now but I don’t know if that’s a good thing or a bad thing since it seems far more powerful like that, the gun has some pretty strong recoil for a 177 cal and its moving more gas then some real guns I’ve seen, but I don’t think its using all that gas ands its being wasted. Another thing, since the gun can now take any paintball gun tank, I don’t have to run co2 if I don’t want to. I can get a HPA (high pressure air) tank and run that instead, and this opens the door for a lot more power since those tanks run into the THOUSANDS of psi and have an adjustable regulator. I know that it’s going to be possible, if not easy to damage the gun with one of those tanks. But for now, I’m running co2. I have done an accuracy mod as well. Since the front sight blade loosely holds the barrel in place, I took it out and cut it away so it no longer touches the barrel, then I took a rubber grommet that fits around the barrel and fits snug in the false outer barrel so it can’t vibrate.
The line for the co2 tank screws directly into the connector that the old little co2 powerlets went into. I did this by drilling out that unit and threading it to use paintball gun line. This was my second attempt at hooking up the big co2 bottle. My first attempt was to drill a hold in a co2 powerlet and tap a thread into that to hook up the line. I also had to cut a hold into the side of my gun to run the line out of for that… That didn’t work at all since there aren’t enough threads on the little co2 powerlets for the line to make a good seal. But with my new setup, the line comes out the tube that the old powerlets went into to. I’ll try to get some pic’s soon.
I also did some messing around with silencers (suppressors) I made my own and used a ‘reflex’ type design. It worked fantastically and sounded totally awesome but it wasn’t worth it because it decreased the pellet fps and made the accuracy terrible, something like 1.5” groups at 15 feet! It was simply constructed from PVC pipe and cardboard for baffles.
Right now, my biggest complaint about this gun is that the trigger pull must be something like 20lbs! Especially with the other hammer spring I have in there. It would be nice to have a hair trigger…
It sounds like you have done some cool stuff to your 1077 and i would really like to see some pics when you can get them.
The only difference with the 99 gun is the threads in the co2 tube allowing the guns to accept the airsorce adapter. If you think your wasting gas a longer barrel would help your gun become ultra- efficient. It would use up the gas giving you a large jump in fps. It would be costly though. You would have to have it milled to specifications and you would have to get a muzzle brake to cover the extension.
Keep in mind that using HPA can not only damage your gun but yourself also. If you want to keep your arm make sure you regulate it to no more than 1500 psi, and thats pushing it. These guns were designed to run on about 900 psi. HPA has advantages like being able to be regulated plus it is not effected by temperature. Also be careful messing around with silencer. They carry large fines and penalties if you get caught.
Ya, the biggest disadvatage to clip fed semiautomatics are there triggers. On the post titled "More Power" i loosly explained some things you can do to the trigger. A much lighter spring, a good polishing and deburring, some magazine work, and lots of lube will help out your trigger a lot, although having a tighter hammer spring will always make the final part of the trigger heavy.
Keep working on it and try to post some pics. I'd love it if i could put a longer barrel in with a muzzle brake so i could see what it looks like and how the performance would be efected but i dont have the money or the time right now. You should think about doing some valve work and mabye adding some hammer weight. If you happen to have a chrony could you post some numbers? Have fun.