[cbcsteve]

Actually an MP5 should be able to reach 100 feet effective range, just depends on your internals I remember my MP5 reached 100ft accruately no problem but it was a upgraded TM MP5 but I sold it long ago, but after fiddling with more guns I learned that

If you really want 100ft effective range, which is actually quite good as from when I play in forest games most engagements begin at 100 feet

1. FPS - If you have a low FPS such as below 300 FPS I found even on heavier 0.28g it won't reach far accurately. I found 330 FPS (0.2g) and higher will start to give you some good groupings

2. Tightbore Barrel - 6.03mm and 6.04mm I find worked quite well. Getting longer is better it improves the reach by a little bit but you have to have a good hop-up unit. For some reason when I had crappy hop up units the BBs would just fart out, which I am guessing there is not a good seal with a crappy hop up unit and hopup rubber

3. Hopup rubber - Mentioned above, Prometheus hop up rubber helped me get straighter shots

4. Air consistency - Upgrade the: Cylinder, Piston, Piston Head, Air nozzle, and Cylinder head.
Getting a better air seal and better internals can increase the ROF and have more consistent air output allowing for the BB flight path to be more predictable

Cheapest Way to get 100 feet
- Stronger spring
- Tightbore barrel
- new Hopup rubber