I have other Glock's but this one has a peculiar part in the trigger group is this factory or aftermarket?

Gunslinger686, welcome to the forum!  Did you buy the gun new? or used? 
The part looks like aftermarket (GHOST ULTIMATE), I think the stock Glock part is solid without slots.

Used , its a gen 3 what about the part at the top of the pic with the spring,my 17 doz not have that?

These may help some...


The Glock Factory OEM Part Orange Trigger Spring Ny2 SP07412


Not sure what was done to make changes....

 :ono wonder I nearly pulled a muscle squeezing the trigger , that things got to go

Get rid of that nasty thing! The Ghost part will serve you well however.

Yeah..Get that back to stock, not NY hacked.  Or something aftermarket.