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Discussion Starter · #1 ·
Ok. To start off what what i have read/been told, i hear that the cylinder needs to be "full" (no holes in it) if your shooting a M16 lengthed barrel. My 416 came with a cylinder with an elongated hole to one side, but i replaced my 300mm TBB barrel with a 509 TBB and now people tell me that i need a "full cylinder" I think this is right, but i just need an official say in it. Whats the difference between the full cylinders and the bored out cylinders?

Now to what i really need to know. I've been reading the holy grail guide on building a DMR. He talked about balancing the volume of the cylinder to the volume of the barrel. He gave a brief explanation on how to do it but does anyone know the step by step on doing this? Also, what does he mean by drilling holes in the cylinder, when he stated you dont need a bored out cylinder if your using using anything under 600mm. Will i be ok if i just put in a full cylinder and not worry about drilling holes in it, or does drilling holes in the cylinder really make the difference?

I know a true DMR is supposed to be semi only, but i sometime use full auto to suppress or make a push on the frontlines. or time to time we play in areas that favor a short gun so ill put in my 300mm barrel. If i put in my 300mm TBB will having that full cylinder affect my gun and the way it shoots? Lastly will using the full cylinder with the 509mm TBB make full auto a bad idea? Im shooting around 400 FPS and use .2 bb's but will use start using .25 bb's

Sorry to sound like such a nub, but i want to get as much accurate info as i can so i can build my gun over the weekend and not have to take apart the gearbox for a good long time :)
 

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Discussion Starter · #6 ·
FPS wise im allowed 410 max. ill go the .28 path and with my luck, save myself from messing up a good cylinder
Kinda off topic but when you glued the foam to your piston head. What kind of glue did you use? I just want to make sure i dont use the wrong kind and have if fall off from the abuse using a lipo.
 

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Discussion Starter · #8 ·
Quick question. I got to shoot my gun with the padded piston head to make the correct AOE, and with the full cylinder installed. I was shooting .2's with my 509mm TBB and i noticed the bb traveling really slow. My only thought is since the spring is a bit more compressed cause the piston is moved back to the the correct AOE, its not getting its full spring back once the gears wind it up. Would getting maybe like a M130 fix this problem? My only other guess is im losing compression through the cylinder head. :(
 
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