Tell you a good news
Sijun resurrected!
Brought any good stuff?
Hmm... M4 CQBR
Could you give me some human stuff?
M4 every day, M4 every night...
Hey, let me take a look
Another AR, the most classic, common M4
Let me see, in the market now
Xin Weier, Jinming, CYMA, Feng Jiasheng, Kublai
at least five manufacturers had made M4 full-assembled blaster
this does not include the receiver set from FTM, Hexin, etc
So why does Sijun choose this type which is almost rotten
to come back to the market of adult gel blaster market?
I think not only because M4 is one of the most acceptable types
but also it must have some exceptional features to let players take out their wallet
I feel a bit touched when I see Sijun's logo again
the last time I saw it was still that "slowback" mag feeding 1911
Errr, this black plastic cover looks the same as CYMA's
Simple manual, and no need to introduce more about Chenghai standard set
Out of the box, a pair of KAC rail covers is given
not as solid as the third party one
but it's still not bad, tho
M4 CQBR, this type of gel blaster has shown thousand times
Since they are the same type
so Sijun cannot do anything further on the outer look
However, you can see its decent surface finish when you get it
which impresses me a bit
Compared to CYMA that under the same price tag
Sijun's receiver surface is smoother
the reflection of the paint gives more sense of metal texture, as well
The material use is obviously not better than Kublai
but the surface finish isn't worse than K2S that costs double-price
About 2kg for the entire blaster, nice hand feeling
On the right side, the selector lettering and the inscription on the upper receiver is well simulated
I don't find bugs in its detail
The metal charging handle feels wonderful
about 50mm length of action
and the spring power is appropriate
Slightly pulling it back will open the dust cover
and you can see the black metal bolt cover inside
The simulated bolt lock is the first surprise brought from Sijun
Just like the charging handle, the bolt will lock back at 50mm
Press the metal bolt release on the right side to release the bolt
The action is rapid and clear, I can't stop playing it
The top rail is standard
but there is a frustrated screw at the front
the existence of this screw means the upper receiver is made of three pieces
However, Sijun's material use isn't bad
the upper receiver isn't soft at all
the precision of molding is nice
you can't even see any gap between the top rail and the receiver
that is good enough
CQB iron sight comes with the gun
but the weight is light and a bit stiff to adjust
The trigger guard is a separated part, average workmanship
The spot style skid resistance on the grip is sharp
I feel excited to hold it
but it stabs my hand when holding it tightly
The second surprise is on the left side of the receiver
The Colt Horse inscription on the mag well
is one of the best simulation that I've ever seen on the AR receiver
you could even see the sign of etching underneath
According to the manufacture, this inscription is etched by laser after the receiver is lacquered
which costs more than molding it directly
The fire selector is made of nylon just like the mag catch
smooth rotation and nicely hold the position
The metal body pins are like Jinming
that locked by allen screws
which makes the disassembly harder
5.56 magazine, one-piece outer case, good quality
but the notch for the mag catch is a bit higher than CYMA's
the mag well is also narrower
so it cannot use CYMA and Kublai's standard AEG magazine
I found that Jinji and Jiqu's magazine could fit well after testing
The navy buttstock that Sijun uses here is a bit different from the gen.2 stock on the market now
the small hole in front of the butt cover is gen.1's feature
good news for the old school lover
Unfortunately, the butt cover couldn't be removed
the accessory box on each side couldn't be used as the battery compartment
there should be some added weight in it
Nylon buffer tube, you can see the position letter on the top
I don't know why the sling mount is assembled reversedly
KAC rail cover at the front, average finish quality
the polishing of the rail edge is not bad
there are metal heat-dissipating plates and gas tube inside
However, just like CYMA, the position of three screws looks not good
so just cover it up by the rail cover
The rail on the handguard and the receiver are not lined up well
a bit uncomfortable here
A little wobbling for the delta ring, a common issue for nylon structure
The triangle front sight is made of two plastic pieces
fixed by four screws on the side
Nylon outer barrel, 14mm CCW
aluminum inner barrel goes out 2cm
pretty much to the end of the flash hider
so you might need a flash hider with integrated hop-up
No black replacement part out of the box
I just find a spare metal one for it
Due to the added weight in the buttstock, so the center of mass goes backward
The nylon buffer tube and outer barrel isn't as good as CYMA
and the three pieces upper receiver makes me not that comfortable
However, Sijun did better on the etched inscription and the surface finish, obviously
When start shooting it, you can see the charging handle has the pre-load function
and the blowback bolt inside the ejection port is the third surprise from Sijun
Of course, you won't get MOSFET under this price tag
but this blowback function really adds a lot of fun
Playing it constantly for a week
the blowback and the bolt lock work flawlessly
the durability is nicely qualified
Remove the upper receiver and you will see
the moving blowback parts are all made of solid metal
The entire structure is not complicated
linked by the rod on the top, the bolt will move back together with the piston
the bolt catch is smartly designed
This gearbox from Sijun is pretty solid
fixed by allen screws
six bearings hold the nylon gear set on both sides
Out of the box, muzzle velocity is about 80m/s
which is powerful enough
the feeding is also stable, but the accuracy needs to be improved
Last year, we were imagining after the gel blaster entered the separate structure era
what will be the developing direction of the product on the market
Only a short year after, blowback and bolt catch
became the standard function of more and more advanced level blasters
After one year of development, AR type blasters and receiver sets on the market are countless now
manufactures have tried blowback and bolt catch on their AR
However, Sijun is the first one under 400 price tag (about 70USD)
who made this simple but interesting function
and this is a big challenge for CYMA who is at the same price point
I can't comment on which one is better or worth more
but if you have more requirements on outer details and realistic feeling
This Sijun M4 CQBR is obviously a good choice
Want more? Subscribe to this channel!
Scan the QR code of my WeChat official account and download the SDGUN forum for more information
At last, stay healthy, see you next time!