help with ak-74 upgrade set up

i have a kalash ak-74, i want to upgrade to improve range, accuracy, and fps. this is my setup >

1. jbu aluminum piston with full teeth (JBU Aluminum Piston (Full Teeth) by: JBU - Airsoft GI - welcome to the) ,

2. systema aluminum piston head with bearings (Systema Aluminum piston head with bearings by: Systema - Airsoft GI - ),

3. Matrix Angel Strike Perfect One Piece Metal Hopup chamber set for AK Series ( Evike.com - Internal Parts | Evike.com - Hop Up | Evike.com - AK Hop Up | Evike.com - Matrix Angel Strike Perfect One Piece Metal Hopup chamber set for AK Series Airsoft AEG. | )

4. g&g hop-up bucking ( G&G Hop Up Bucking by: G&G - Airsoft GI - welcome to the ultimate )

5. metal bushings
6.metal shims
7. reinforced src nozzle

questions ?

1. is this set up ok, should i change or add something, what do you think ?
2. is it a good idea to get a full metal reinforced cylinder head ?
3. what are the advantages and disadvantages from this set up ?

what brand is ur ak (most of these parts are TM compatible and so it will help if you ak is a TM compatible brand)

Its a kalash AK 74,,so yes it is TM compatable,,,,is it the AK 74m or the AKS 74u.

kalash is a brand? and id go for a polycarbonate piston

ECHO 1 Polycarbonate Piston (Full Teeth) by: ECHO 1 - Airsoft GI -

i would suggest you buy the sytema version but as you can see that 2 star rating doesnt sit with me too well

Area 1000 Polycarb. Piston by: Systema - Airsoft GI - welcome to the

its a kalash

that's a lot of money for almost no upgrade.

if you are not going with a more powerfull spring I would also agree on getting a polycarb piston and biggest bang for buck at around 330fps is tiano-koba twist barrel. That will make a huge difference in your range and accuracy.

I am not familiar with the brand of AK you have, but normally the stock hop up unit is perfectly fine unless ur firing a high rate spring (at least with TM's).

Question answers
1) Yes
2) Yes
3) There are no disadvantages, you will improve all the things you wanted to