D.I.Y. TPX Fiberglas Freak Back

[Spydercam]

Hi,
cause stock Tippmann(A5 Thread) Freak Back´s still don´t work that well i build me a cheap and much better one !!!

Just need for building the form: Fiberglas, Bolt, Breach, Barrelcover, Freak insert(i took a .682) some paper, some tape and use grease for anti stick and fill Areas where you don´t want fiberglas.

I have checked:
The Bolt O-Ring seals in the area before the Little gap between Barrel(Insert) and Breach starts. (I´ve fiberglased without the bumper Bolt O-Ring, so the bolt could move deeper than it ever would do). The bolt would push the ball easely complete into the insert, cause of the form of the bolt tip there is still material behind the O-Ring.

Also made this cause of the Major Problem of low fps by using HPA, different Barrels don´t help, the stock one is bad cause big bore and stock Freak Backs don´t feed into the insert etc. !!!

 

[Missy-Q]

Looks legit.

 

[Spydercam]

Thanks !!!

Here i made a pic to Show how far the bolt will move in and how Close it´s to the insert etc.

Setting is like installed: Just the bolt end has 1-2mm distance to the bumper O-Ring = is what dives into the insert(Barrel). On the breach i have this Little scratch(marking) it Shows the endpoint of the stock Barrel in the breach.

 

[Spydercam]

Cause the new Barrel is that nice and short i cut my old cartrige cap(the not adjustable one, cause it´s a TPX) to make the front in one line also it´s looking much better than stock i think !!!

Just Need to fix the look of the front view.

 

[Spydercam]

There some more pics of the D.I.Y. Back:

 

[Spydercam]

I´ve build me a second one(cause it´s cheap and a quick build), Cocker threaded.

Got the same size like the one for the TPX.

 

[Spydercam]

Here the 3rd one i´m going build for my TMC(98 Thread) also cause the stock Freak backs for A5 and 98 are ... (cause of the Long way to the insert)

There i got some pics of figure out which is the best Position for the insert in the back.

hammer on pin uncocked Position, not pushed:

hammer pushed, the pin is complete down to valve body:

Insert in ideal Position:

There are three solutions make the bolt fit well into the bolt dive into in area in the Barrel:

1st: Cut a Piece of my .697 insert and put it behind (fits well to bolt O-Ring)
2nd: Use a bigger O-Ring on the Bolt for getting up to the insert Diameter
3rd: Build the back like original and secure the insert on top by a tip

 

[Spydercam]

So i´ve cut a Piece(lengh 11mm) of my .697 insert which fits perfect to the bolt(O-Ring), much better than in the stock Barrel.
I´m not finished fiberglasing but you can see all on the Pics which is important !!!

98 Thread Freak Back 2.0:

Finished you simple choose your insert, push it in and behind Comes the .697 short Piece, for the bolt dive into Barrel.

 

[Spydercam]

Here the finished pruduct shure not a Beauty but it´s working, which is most important i think !

 

[Spydercam]

Here i made a draw of the Freak Back 2.0 for A5 and 98 threads, may interesting for some People:

Cause i´m german it´s metric system(example: 11,00 = eleven millimeters and Zero 1/10 also zero 1/100 of a Millimeter etc.)

Translated text:
(up/left) Movement of valve pin between valve open and closed
(right/down) from Bolt tip to middle of the paintball