After collecting carefully the components and adjusting it propery, you can see this special weapon.

The components of this weapon are the folllowing:
 

GunSmith Bros - STI 2011 Costa Carry Comp Airsoft Slide Set

DP Enhanced Hop-up Chamber Set

75° Hop Up Rubber
DP Aluminum Nozzle Pro Set - 7075 Aluminum
COW B01 Dynamic Blowback Housing - 7075 Aluminum
KM 6.01 Interchange Barrel - 4.3
Airsoft Masterpiece hammer
AIP 120% Enhanced Recoil
Airsoft Masterpiece magwell
COWCOW Tech Custom Grip

The price of the whole waepon with all its parts is: 560  £
It can be bought in several parts, too, the original, starter sett is: 290 £

https://www.rainbow8.com/products/gunsmith-bros-sti-costa-carry-comp-standard-kit-for-hi-capa?_pos=1&_sid=2c69d764f&_ss=r
The Slide Kit Set include Slide, Outer Barrel, Comp, Front & Rear Tactical Sight, Frame with Rail, Recoil Spring Guide and Guide Rod. This version has a huge advantage, you can adjust to any TM waepon as you like.

You can purchase it in both cases by paying in advance, the international parcel delivery is extra cost, within Eu duty free parcel delivery is possible in 10 days from Hungary to any other country is E.U. Buyers fron U.K. should ask information about the terms of delivery.The parcel can be delivered to non Eu countries as well, in this case it has all the responsibility of the buyers considering the arrival of the parcel and the countries's terms of delivery.

Suggestions:

1. Slide stop change
The current AW slide stop is functioning,but sometimes can't be hanged backwards with gas is running out.

2. Modification of grip safety,depending on the function
it is also AW

3. Stippling
The holding of the bare CowCw pistol grip is very comfortable, I would have liked to make it more beautiful, that is waiting for you if you are willing to buy it.

As all parts of this weapon are unique, it meets all requirements, it needs time to get used to it, its grip safety is only a decoration, the trigger is very light and the sear spring is so delicate that it can empty the magazine in a second and it raises the AIPSC speedsofter player attention immediately.

In case of the GreenGas magazines, the weapon's compensator ir surrounded by a dougnut shape white cloud and it sounds with a sonic boom like a MIG aircraft can reach its high speed in atmosphere. It is advised to use the Co2 magazines with shooting ear protection.