TM ak47 low FPS

[coach]

Originally Posted by Dart

Hey guys, I bought my TM ak47 about a month ago and thought it was working fine, that was until I actually fired someone elses gun, than went and cronoed it. Its shooting at 220-230fps with .25g BB's

not shooting low at all. I'm in the 230's with .25's and it got enough range and accuracy to keep up.

[Danke]

Don't forget that the limit is a limit and not a goal.

Lots of folks in the area with hot guns don't show up because something's gone down or only last half a day till something pops again.

[Dart]

Originally Posted by m102404

There's a couple of great articles out on the 'net about tightbores...I won't repeat it all here aside from there's not a whole lot to be gained for general/regular field usage with anything tighter than a 6.04/6.03mm tightbore.

Personally, I think tightbores in "little" guns (i.e. MP5/AKS') are a waste of money...but hey, it's a hobby and do whatever makes you smile.

Stock TM's are reliable out of the box. Their parts are balanced for the power level. Just as you'd never drop a 400HP engine into a 100HP car without considering the transmission, brakes, tires, etc....you can't just drop a more powerful spring in and expect the stock parts to hold up as well (this is a bit of an overstatement to get the point accross).

From a stock TM AEG, consider the following for reliability (R), performance (P) and accuracy (A). Read up on the Stickied posts about "What to upgrade...and why"...they're there for a reason.
- metal bushings (R)
- shimming (R)
- greasing (R)
- spring guide (R)
- bearing spring guide (P/R)
- gears (R...at higher power levels...but they're not always needed)
- tightbore (P/A)

With a "clone" there'd be a lot more to add to that list.

If you run your rifle somewhere between 370-390fps w/0.20...your internals/battery/motor will thank you for it. With most common upgrades (listed above) you get that with maybe a M100 or more likely a M110 spring. It's not impossible to get mid 380fps with just adding a bearing spring guide, a quality M100 spring and a 6.04mm tightbore to a stock TM AEG (carbine or regular length). But a lot depends on how well the compression of the whole system is...it is an airgun after all and air leaks will kill off power faster than anything else.

Run a M120 if you want (it'll put you in the 390-430 range depending on what other upgrades you do). Be prepared for anything but either brand new quality mini batteries or large batteries to die off really quickly. Also be prepared to wear out your internals much quicker (kicking off that never ending parts replacement cycle).

Just because the field MAX limit is over 400...doesn't mean you have to shoot at that power level. The extra 10-20ft that you'll pick up in range is easily covered in 3-6 big steps.

Best of luck,

Tys

Thanks for the good info. As I said I really did not want to start doing upgrades to this gun, my plan for it eventually is to go to a Saw style weapon *a RPK*. But thats down the road and after I buy another AEG to actually play assault, but thats another bag of worms in a hat.

So your saying with an M100 spring on stock internals I should be fine? or are you saying do all the upgrades you listed THAN go to a m100 spring?

If thats how the gun is supposed to shoot I am not that worried about it. Would a better hop up system get more range out of the ball?

Also on a side note what is the best way to slow down ROF with out going to a heavy spring, gears? I want to bring it DOWN to 600RPM like the real thing is. Running 30 round real caps at 800RPM they go fast if your not paying attention, which I am learning to lol.

[AngelusNex]

Originally Posted by Dart

Thanks for the good info. As I said I really did not want to start doing upgrades to this gun, my plan for it eventually is to go to a Saw style weapon *a RPK*. But thats down the road and after I buy another AEG to actually play assault, but thats another bag of worms in a hat.

So your saying with an M100 spring on stock internals I should be fine? or are you saying do all the upgrades you listed THAN go to a m100 spring?

If thats how the gun is supposed to shoot I am not that worried about it. Would a better hop up system get more range out of the ball?

Also on a side note what is the best way to slow down ROF with out going to a heavy spring, gears? I want to bring it DOWN to 600RPM like the real thing is. Running 30 round real caps at 800RPM they go fast if your not paying attention, which I am learning to lol.

"It's not impossible to get mid 380fps with just adding a bearing spring guide, a quality M100 spring and a 6.04mm tightbore to a stock TM AEG" < that's what he said and I agree with that 100%.

A better hop up is only really required if yours cannot make the bb arch up when on max, if yours can do that then proper adjustment is all that is required. (though a guarder clear hop up rubber is always a nice addition)

To drop ROF throw in a Hi torque motor and Hi torque gears, they'll give you better trigger response and lower ROF (done this to many guns that are set up for massive batteries and/or lipos, it's really effective)

[Frozencricket]

For an M100, you'll want to swap out the bushings and reshim the mechbox. You may also want to go for a bearing spring guide, but it's not necessary.

To bring down your ROF, there are 2 ways: torque-up gears and motor, or MOSFET. I would go the MOSFET route, since it's easier to install and it's cheaper.

EDIT: my TM AK was running an MS110, bushings, shims and bearing spring guide and it was shooting 380fps. Everything else was stock.

[lemegacool]

Originally Posted by ancorp

What in the world does motor height or the AR latch have to do with velocity?

he stated another problem...

Originally Posted by Dart

Also I should add when I fire in single fire there is kind of a...click clack it sounds like a bolt getting slapped backwards but its not from where the bolt is, you can kind of feel it in the grip. I can take a video if that helps.

and thats why i suggested a fucked up anti-r latch .sorry for the confusion...