Angel Custom Upgrade Pro Kit for WE TM KJW Hi-Capa 5.1 Series Airsoft GBB Pistols - 150%

"I bought this because I was having issues with my Marui Hi-Capa and was hoping that something in this kit would fix the problem, and it did!

The loading nozzles is a replacement part, not the best for my Marui, but good for WE and KJW. The piston head is nicely made, ported, high quality and the o-ring that comes with it is of high quality. The cylidner bulb is good, oring is good, when installed I notice my FPS goes up, this is also better than the stock TM bulb beacuse the TM one is plastic.

Recoil spring - 5/5
I am very happy with the recoil spring. It is stronger than a stock TM, a stock WE, and a Guarder 150% recoil spring, just as expected. I am using this in my TM and am very happy with it.

So far, good buy!

"This is a great kit...
Pros:
Parts are precise and seem of great quality
Springs are strong
Noticeable difference in blowback speed, power, range, feeding, etc.

Cons:
Gas Consumption
OMG: Maybe 1.5 mags on a good day
4.5/5

"This is an absolutely fantastic upgrade kit!!! It does exactly what it's meant to do and totally blew me away. The power output of my pistol (WE 4.3 1911 Desert Warrior) has increased quite noticeably but sadly as has it's gas consumption with the added high flow valve installed. Also the main recoil spring for this cannot be used properly in a 4.3 1911 simply because it is far too long and prevents the slide catch from working due to half cycle (enough to chamber a new round but not enough to for the slide to go all the way back). Which that is an easy fix if you have something that can cut it down to proper length such as wire cutters (don't use cheap ones trust me!) or a dremel to cut the wire shorter like I did.

PROS:

Increased power
Stronger parts
Faster trigger response
Greatly increased recoil thanks to those hefty 150% springs

CONS:

So far none at all except for the spring modification I had to make in order to use it in my gun.
So 4 out of 5 stars because it was advertised to fit in both models and in fact doesn't