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Boyi DBoys AKS74U Airsoft Rifle V2 Steel
- Velocity: 350 FPS (0.2 gBB) / Range 160-180 Feet
- Barrel Length: 12 Inches / 30 cm
- Magazine Capacity: 450 Rounds
- Steel Body and Receiver
- Metal Side Folding Stock
- Metal Front & Rear Sling Mount
- Battery & Charger Included (Small)
- Made in China
Boyi D-Boys Kalash AKS-74U Manual
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The real steel AKS-74U (Avtomat Kalashnikova Skladnoi 1974 Ukorotshjennyi) was introduced by the Russia Tula Arsenal. It is the compact version of the AK-74 as the barrel is significantly shorter and equipped with the folding stock for ease to mount and dismount. The Front sight and rear sight radius was reduced due to the short barrel. The muzzle brake was improved from the full size version to reduce muzzle flash. The AKS-74U was intended as a personal defense weapon (PDW) for tank, helicopter and other vehicle crews as well as the famous KGB, paratroopers, special forces operators where operations are usually in urban area and comfined spaces but fire power of an assault rifle is needed.
Cyma 035 AK Vs. Boyi (D-Boys) Kalash RK01 Airsoft AEG Rifles Click for more reviews
Editor's Note: review and comparison of two of
the recently released AK clones --- the CYMA 035 and the Kalash
(DBoys/BOYI) RK01. Previously, AKS kits were expensive to
acquire, and with the release of two low-cost ACMs, have made
collecting for avid AK lovers more affordable. This review is
very comprehensive and loaded with pictures. Let's
catalog the similarities and differences of these two Krinkov airsoft gun clones
and see which one is the best fit for you and your play style.
To make for easier reading, the discussion will be divided into:
- the business end -- muzzle brake and front sight block
- rear sight block
- receiver: fire selector lever, side scope mount plate, pistol grip
- receiver: mechbox, hopup assembly, bolt carrier & guide rod
- folding stock
- issues & concerns
- overall impressions
Let's start with the usual -- the unboxing.
The Cyma AK comes in a plain brown cardboard box:
In the box are the NiMh 8.4v 2/3A 1100mAh battery, charger, a pack of
0.2g bbs, a cleaning rod, and one hicap mag. no manual. no sight
The Kalash definitely wins in this area with its arresting packaging.
In the Kalash box, aside from what Cyma has, Boyi includes a gorgeous
black sling. Could have been another plus point for Boyi if the sling
were a khaki or an OD sling that fits the Krinkov.
The Kalash comes with a good manual which I forgot to include in the
pic. The manual, however, omits a plastic part that positions the hopup
chamber in the receiver. Minus points for Boyi here.
BUSINESS END: Muzzle Break and Front Sight Block
The Kalash muzzle brake assembly (top) has three parts.
The TM-style Cyma front sight base, on the other hand, is secured onto the outer barrel by a screw.
The Cyma muzzle break is also done TM-style and goes CCW onto the outer
barrel. It is not properly clocked by the clocking bolt that goes into
the front sight base in the usual TM style.
Although Cyma (as of this writing) has released a wood-handguard
version of the 035 with handguards very similar to the Kalash and Boyi
has released a plastic-handguard version of the Kalash with handguards
very similar to the CYMA 035, we will look at the handguards of the initial
versions from the two manufacturers. The next three pics show (in
sequence) handguard internals, handguard externals, and hanguard rear
The red arrow shows where the upper handguard locking bolt in the Cyma
notches into the upper handguard rear retainer ring. This prevent upper
handguard rattling. The upper handguard, btw, of the Kalash unit I
looked at was very loose -- it could be revolved around the gas tube
axis by about 15 degrees each to the left and to the right around the
gas tube axis.
The Cyma lower handguard (left) tab is a wee bit higher and a tad larger than the standard TM-style AK lower handguard.
Just like the RS, both the Kalash and the CYMA 035 have lower handguard locking levers.
REAR SIGHT BLOCK
Another main difference between the two airsoft rifles is the way the front
end is secured to the receiver (stamped steel in the Kalash and pot
metal in the Cyma). The CYMA 035 secures the front end to the receiver in
the usual 4-screw TM-style. Is Boyi trying to say something with the
white "QC" label it sticks in rear part of the Kalash magwell?
The Kalash, on the other hand, mimics the RS with its two pins.
Punching out the rear sight pin is not necessary to separating the
front end from the receiver. Remove the rear sight block pin first.
Removing the rear sight block will then uncover the outer barrel grub
screw (red arrow). Unscrewing this grub screw will release the outer
barrel after the outer barrel pin is punched out.
punch out the pins from the right and reinstall them from the left with the ridged end toward you.
RECEIVER: Fire Selector Lever, Side Scope Mount Plate, Pistol Grip
There are fewer parts in the Kalash fire selector lever assembly than
there are in the corresponding CYMA 035 assembly. The 035 (top) has a
plastic screw cap while the Kalash dispenses with the cap with its
two-tiered flat screw. It also has a single alloy lug taking the place
of a lug, a brass guide and a lock washer used in the 035.
During assembly, the Kalash selector lever must be pressed firmly into
the alloy lug until you hear a click. Fire selection will otherwise be
mushy and the lever will operate loosely.
Going around to the left we get to the side mounted scope plates. No
real difference here except a few minor variations in shape and build.
Both are pot metal. The Kalash side plate is more sharply molded and is
riveted to the receiver while the 035 side plate is attached by two hex
Some players have expressed a preference for the material used in the
Kalash pistol grip (on the left) which looks and feels like synthetic
composite. They cannot be interchanged since they have different
attachment tab configurations.
RECEIVER: mechbox, hopup assembly, bolt carrier & guide rod
The mechboxes of the two replicas are essentially similar V3s. The Kalash uses 7mm bushings and a reinforced shell.
and the 035 has the usual CM02 AK mechbox.
The Cyma mechbox is supposed to come with metal bushings although some
units had plastic bushings. Both use relatively short but stiffer
springs and gear.net spur gears and XYT sector gears although a unit
bought in Manila and shipped to Davao had unmarked gears. Both use Type
2 brass cylinders. Both also have plastic spring guides and ported
plastic pistons but the Kalash has an aluminium piston head.
picture courtesy komrad todoink.
The Kalash hopup assembly has more parts than the 035 and is attached to the receiver in a different way.
Another main difference between the Kalash and the 035 is their
implementation of the bolt carrier guide rod and charging handle. Cyma
uses a slightly revised TM-style guide rod kept in place by a tab on
the mekbx top retaining plate while Boyi uses a shorter guide rod and a
bolt carrier 1/2 the size of the standard TM-style bolt carrier. Both,
however, have relatively weak guide rod springs -- accidental nudging
on the receiver lock has resulted in surprise leaps of the receiver
To keep the guide rod and charging handle in place, Cyma uses the right
receiver edge as a rail for tabs on the carrier handle.
Boyi uses a downward extension of its shorter carrier handle to keep the shorter guide rod in place.
This extension slots into the receiver (red brackets) near the right
side of the mekbx. This method does not seem sufficient - a definite
rattling can be felt when you try to move the charging handle without
pulling it backwards.
Another nice touch in the Kalash is the ridged receiver lock -- verrryy RS.
Both the Kalash and the 035 have stamped steel folding stocks and pot
metal stock trunnions. There is a minor difference the way Boyi and
Cyma made their stock strut plates. The Kalash is nearer the RS with
its welding mark but is a bit sloppy with the way the sling swivel is
The Kalash is also nearer RS in the way the folding stock locks into the stock trunnion.
Yellow arrow shows the ridged receiver lock which attaches to the top rear of the mechbox in a different way.
The tabs on the receiver lock are only half that of the standard
TM-style locks and slides into appropriate slots at the rear top of the
mechbox. Red arrow shows the lock ridge which in the RS helps prevent
unlocking during RS bolt cycling but is just nice to have in our
The 035 averages 370fps out of the box while the Kalash chronoes at
390-400 stock. With minimal upgrades such as good shimming, an air seal
nozzle, and a bearing spring guide the 035 I tested equaled the Kalash.
Using the poor man's chrono, both pierced both sides and the bottom of
a Coke Light can but only dented the center top.
All users of the two replicas reported satisfying accuracy for both. To
see for myself I did a test with .2g ICS bbs from 12' in a sitting
position (I have no backyard and my room is quite small he he he ) with
unzeroed iron sights.
The Kalash posted consistent and good groupings in both semi and auto.
But the 035 registered even better groupings.
Three 10-round auto bursts with the 035 produced very consistent
groupings with all eight rounds in the third burst hitting the
bullseye. The two flyers in the third burst (red arrows) were very
close. The longer inner barrel of the 035 certainly made a difference.
It seems that Cyma is learning its lessons well. This kind of accuracy
tops the accuracy results registered by two of its recent products –
the M14 and the Thompson. Two 035 filAKas users (team mates, iirc)
reported 3 out of 4 hits at 150ft and 3-4 inch groupings at 40 meters.
No definite data from filAKas Kalash users except that they were
surprised at the range and accuracy they were getting from the short
ISSUES & CONCERNS
1. Several users of both replicas reported bb flight stability problems
that were later traced to dirty/oily barrels and/or hopup buckings. One
035 user, however, is still trying to find the cause of bb flight
instability in his unit and thinks it is due to muzzle brake/outer
A related issue is the misaligned front sight due to improper placement
of the front sight block retaining screw in the 035 reported by a
couple of players.
2. Some folding stock play due to loose-fitting stock hinges. Also some
stock wobble due to a loose fit with the stock trunnion for both
3. Over-hinging in receiver cover for both replicas due mainly to the
very narrow overlap between the rear sight detent tabs and top edges of
the rear sight block.
The stiff spring activating the upper handguard locking bolt doesn't
help those players who are not used to the Krinkov. If you just unlock
the receiver, it leaps up and pretty soon a rut is scratched on top of
the receiver block that allows the receiver cover to fold beyond 90
degrees over the sight block. This often allows the locking bolt to
escape and the spring to be lost.
There are also, AFAIK, two documented cases of receiver cover push tabs
breakings. However, these may due to players being new to the upper
handguard locking mechanism of the Krinkov.
4. The filAKas 035 test unit suffered a breakdown after running through
10 hicap mags in stock configuration and 10 hicap mags with a PDI 190
and an 11.1v lipoly battery.
When disassembled, three bbs were found blocking the inner barrel near
the hop up chamber of the test unit so this was probably due to user
fault rather than gear failure. Some will probably argue that the gears
should have withstood bb jamming situation.
5. The Cyma accepts Boyi, JG, and CA mags including the HLK drum mag
and the Boyi Quad mag. The Kalash can only use its own brand mag and JG
mags without some shaving. This is mainly due to the difference in mag
catch widths of the different mags.
In shaving the mag catch, one also has to follow the standard slope
angle of the Boy mag catch. This allows easy mag release. Pic below
shows the 035 hicap mag sandwiched between two Boyi hicap mags.
6. There are gaps between the Kalash receiver cover, the top of the
rear sight block, and upper handguard rear retainer ring that allows
the batt to peep through.
7. As mentioned before, the upper handguard of the Kalash is so
loose in fit it can rotate around its horizontal axis by about 15
degrees left and right.
8. The mag lock spring on the
035 is weaker than that on the Kalash. A 035 user reported dropping his
mag thrice because he accidentally nudged the mag relese lever while
Filipino players, especially those who have not experienced using
shorty AKs, have been very happy with the functionality, playability
and robustness of the Kalash and the 035. They have found that the
maneuverability and pointability of both make target acquisition easy
and the stock ergonomics suited to local physiques. The 035 feels a
little bit more pointable because of its metal outer barrel while the
metal receiver of the Kalash biases the weight a little bit more into
the palm of the hand.
Here's a summary of what we've looked at:
point goes to Kalash for its wood handguards and metal receiver
although its finish needs improving to bring out the beauty and
strenght of the materials; consolation to the 035 for its metal outer
Build quality: point goes to the 035 for its generally very good build; pat on the back to Kalash for its RS features.
BIG demerit for Kalash for sloppy tolerances. One player experienced
his barrel pin slipping out while his unit rested on the bed. Could be
an isolated case but it should not happen at all -- especially since
that pin is the main attaching point between the fore end and the
Stock fps: slight edge to Kalash for its 390-400 fps versus the 035's 370 fps.
Accuracy: Kalash has good groupings but the 035 has better groupings.
Functionality and Playability: slight
edge to the 035, IMO; another pat on the back to Boyi for including a
stock battery that gives significantly better ROF than the Cyma stock
batt. Especially when used in the 035.
the 035 and the Kalash come out almost even with the Kalash topping the
looks department and the 035 having a little bit of an edge in
playability due to its longer inner barrel, metal outer barrel, and
more structurally rigid feel.
Many players will argue this conclusion and that is expected. The
majority of airsofters, as is usual, get and play their preferred
weapons - no matter what other players say.
The debate about which clone Krinkov should get hotter when the JG
Krink is released, although by that time it may well be known as the
Vector. Such a pity that Cyma did let go of the opportunity to brand
the 035 by its deserved label -- THE ACM KRINKOV.
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