Sniper M4 project finished with 650mm barrel... Now a few questions!

[MasterGoa]

OK...

Finished my upgrade to bore-up and hop-up change.

I noticed that auto fire precision is way up,
so this was the desired effect.

However, I often double out on semi and in semi,
works and not and works and not...

Could I have misplaces the anti-reverse?

MG

[lord_sid]

Sounds like the motor is over rotating in per cycle.

Suggest Mosfet with active breaking to stop the motor after a full cycle on semi.

[MasterGoa]

Update!

OK, well the anti reverse was installed OK but I put
the spring on backwards... So the gear would
roll back and another BB would chamber...

Also, while I was busy holding everything down,
the air nosel(sp?) move to the back of the tappet plate
and did not go forward...

Anyhow, all is great now and I can reliably hit a target at 100ft
and that targer is 10inch by 10in which is roughly someone
chest area...

And what a difference! No more divers, always perfect shots!

And the KSC and BBBastards BB's are soooooo much better than the others...

They even load better with the BB loader...

So I am a happy camper! Eh... Sniper!



MG

[ILLusion]

Originally Posted by Amos

... Ooh Madbull rubbers...

Big mistake.

You should invest in a RH75 or RH85 rubber by KMhead.

I think you mean KM/Head1950's RH55, RH65 or RH75 hop up rubbers. An RH85 does not exist (that I've ever seen, and if it did, it'd probably be for 500+fps guns.)

Also, if you're using an RH75 rubber, it's highly recommended you use it with a KM barrel, or you'll end up with inconsistent and low FPS with jamming.

[CDN_Stalker]

Originally Posted by Mantelope

Incorrect; it'll actually drop your expected FPS as well as introduce greater variance. Not quite as serious as the long barrel/short cylinder situation, but regardless, you need to match your cylinder and your barrel.

+1.

Think I posted this already, but I tried a full cylinder in my MP5 (229mm barrel, ported cylinder) few years, and where my gun was shooting 365fps at the time, I chronied it after and it sat at 330fps. Not matching the cylinder with the barrel length will cause problems, even when going to a shorter barrel than normal.