Mod Nâng Cấp Cò Phẳng Cho Tikka T3

Wanted a flat trigger for my MDT rig, didnt like the complexity of some aftermarket options, and thought the stock trigger assembly was already very good.

This was designed to allow for more finger positions and a more comfortable hand / arm position. (In my opinion) Especially with a pistol grip chassis like a MDT or KRG.

The file is intended to be metal 3d printed or waterjet out of stainless steel.

Note: The waterjet process has not been fully validated

The original triggers were printed with sintered and heat treated 17-4 PH stainless steel. 

316L stainless steel can work but its not validated. Some options for metal 3D printing are provided below.

Post processing includes flattening and polishing the sides and contact surfaces, followed by hand fitting to the specific trigger housing.

Hand grinding on a stone, then lapping, followed by polishing with sandpaper up to 10,000 grit is recommended.

The trigger pivot pin hole will need to be reamed to size. An ordinary twist drill will work but a reamer is preferred.

A drawing is provided with critical dimensions, currently the tolerances are tentative.

(I only had 4 tikkas to work with so not a large enough sample size and other reasons)

The other steel contact surfaces can also be polished.

The highly polished surfaces will reduce the trigger weight but a lighter trigger spring can be use to further reduce the pull weight. An option is provided below.

Important Safety Note:

The rifle can slam fire if the geometry of the trigger or the heat treat is off. A softer heat treat can result in wear that creates a burr on the contact surface. This burr can be stoned off and re-polished. The slam firing can be detected early by running the bolt extremely aggressively.

(Generally the “slam firing” isn't aggressive enough to actually set off a round but it's still undesirable)

Misc Notes: 

• The 9th revision has support for the original polymer stock.
• The 9.1 version adds a little bit of material for hand fitting
• One of the pictures hads a small history of notable revisions (because I think its cool)
• Have not personally tried the mod with a KRG chassis

Disclaimer: 

• The rifle should be drop tested after this mod, result will vary from hand fitting, material choice, fabrication method, and heat treat. I cant guarantee any one trigger will be safe without extensive testing and validation.
• I'm not responsible for any thing you do. This might not be legal where you are.

Metal 3D Printing:

https://cart.jlcpcb.com/quote?businessType=tdpGoodsFile

https://craftcloud3d.com/upload

Trigger Spring: (Optional)

Yodave Products (Google)

(If this isnt allowed on printables just let me know)