How to build a Kublai based P1 Gel Blaster from scratch?
What is a GBB gel blaster? The acronym “GBB” stands for Gas Blowback that describes the blowback action of the gel blaster’s slide with the help of pressurized gas stored within the magazine. And the residue gas will be utilized to propel the gel out from the inner barrel. It is a very popular system due to the realism and experience it can offer to the user.
GBB requires gas to operate. The type of gas for a gel GBB blaster uses are the following; R134A gas, R220 gas, R290 gas, CO2, etc.
It is usually always recommended to use only the R134A gas if you have a stock GBB gel blaster that uses nylon slides. High pressure gas such as the Green Gas or CO2 will wear out the slide prematurely if not outright damage it catastrophically. Contrary to the popular beliefs that a high pressure gas can destroy a gel before it exits the inner barrel, it almost always is not due to the gas pressure but other factors such as the chambering process of the gel from the magazine lip into the inner barrel, inner barrel quality or even the size of the gel pellet itself.
The magazine which stores the gas is the fuel for the entire operation of a GBB Gel blaster, without it it’s just a piece of plastic and some metal parts that won’t shoot anything but certainly a nice paper weight display piece nonetheless. The Magazine is also one of the more expensive and delicate parts because if it does not behave like it should, your GBB gel blaster will not function properly. Thankfully the Magazine is a very serviceable part and it can be fixed with the O-ring seals or valve replacements made for it.
This blogpost will break it down for you to understand a Kublai based P1 GBB Gel blaster more parts by parts.
A GBB blaster typically consists of 2 major sections: Lower frame and Upper frame.
Starting from the Lower frame it consists of the following parts:
Frame, Chassis, Mag catch, Hammer assembly, Slide catch, Trigger and trigger bar.
Here are the parts for the Upper frame section:
Slide, Housing, Chamber, Inner barrel, Sights, Outer barrel and Rear cover.
There are also additional parts that won’t affect the GBB blaster itself as much for performance but more for quality of life changes. Example a Magwell Flare, what this does is when installed on the magwell of the lower, it enlarges the magwell and creates a slope inwards to the entrance making it easier to reload without looking at the blaster.
For a quick rundown for parts to make a Kublai P1 here is the list the bang for your buck (in Malaysian Ringgit).
Cheapest part for build a working Kublai P1:
For tools you would need are the following:
Phillips head screwdrivers
There also special tools for GBB blaster that’s optional to have but you would an easier time doing maintenance for your blaster:
Magazine valve tool
P1 Workstation (is a magnetic workstation)
Valve tool is a tool for you to adjust the valve outlet of your magazine for the gas to flow.