Starting at the tip of the outer barrel we can find a cylindrical muzzle device known as a "shotgun muzzle choke", which allows the spread pattern to be varied on a real shotgun shooting buckshot. The device on the CM.102 does not function in the same way as the real steel firearm, but is nonetheless a nice inclusion for added realism, and gives the SGR-12 a completed look. The added perk of this muzzle device is the noise it makes when the shotgun is fired! The choke gives a serious booming muzzle report which is sure to make the enemy team think twice before sticking their head out of cover! Both the muzzle device and outer barrel of the CM.102 are constructed from aluminium, as one would expect for a "full metal" AEG.
Surrounding the barrel we can see the handguard, which is a single piece with the receiver. This piece is constructed from aluminium and is precisely machined and finished with a smooth matt black anodization. This is known as a "monolithic" upper receiver and is a preferable attribute due to the additional structural strength it provides over a separate handguard and upper receiver. With a monolithic upper receiver, you will never experience the pain of having your handguard loosen up and rotate, and it will always sit straight and true!
The handguard features an aggressively styled front end, together with angled vent ports along either side which match the angle of the front of the handguard. This gives the SGR a menacing look, and gives us the feeling that this is the smooth and slick looking AA-12's evil twin! The truth is the SGR-12 is considerably more advanced in ergonomics than the AA-12, the design of which originated in the 1960s. The SGR-12 sports modern handling and features, and is more like a SCAR-H on steroids than the AA-12 when it comes to handling and ergonomics
On the top, bottom and either side of the handguard we are treated to M-LOK negative space attachment slots which allow any M-LOK accessories to be mounted, as well as 20mm Picatinny rail adapters for M-LOK. At the 6 and 12 o'clock position, there is a short length of 20mm Picatinny rail machined into the monolithic upper, with the 6 o'clock rail providing the perfect spot to mount a tactical flashlight, and the 12 o'clock rail providing a suitable mounting point for the included flip-up front iron sight.
The mock ejection port can be found on the right side of the upper receiver and is where we can find the triple HOP-up adjuster system. The adjusters can be accessed by pulling the charging handle back whilst you apply your adjustment. With the charging handle pulled rearwards you will see three adjuster wheels, with recessed markings to indicate the barrel each adjuster coincides with. The adjuster closest to the barrel tip controls the HOP-up for the right side barrel, indicated with an "R", the adjuster in the centre operates the HOP-up of the uppermost barrel (indicated with a "T") and the final adjuster adjusts the left side HOP-up and is indicated with a recessed "L".
The HOP-up system of the CM.102 SGR-12 operates differently than a standard AEG, and not only offers adjustment for various BB weights but the HOP-up of the left and right side barrels are set at an angle to allow you to widen and reduce the spread of the 3 BBs the SGR unleashes with every trigger pull. The top barrel HOP-up can be adjusted as normal to extend the range, but the more adjustment applied to the side barrels the greater the spread of your "shot" will be. This means that rapidly moving targets are easier to hit, and you can get off the first shot at close range safe in the knowledge that you are 3 times as likely to land your shot, even if it was fired in haste without aiming properly!
The charging handle is located at the top left of the upper receiver, similar to a SCAR rifle but does not use a spring to return so following your adjustment you will need to push the charging handle forward to return the mock bolt to its original position and conceal the adjuster wheels. The charging handle also folds flat against the receiver when not in use which reduces the chances of the charging handle snagging on your gear and inhibiting your movement.
Moving down to the lower receiver we can find a familiar pistol grip and fire selector location, taken from the well laid out M4/AR15 platform, meaning if you rock an M4 you will find the SGR-12 very easy to adapt to. The pistol grip is a "Tango Down" style ergonomic grip, which is known for its comfortable design and has found its way onto many customised rifles used by special forces around the world. The fire selector is located just above and includes safe, semi-automatic and fully-automatic fire modes, with an ultra-short 45° throw between the modes of fire. Each selector mode is marked with a recessed pictogram, with a "0" to indicate the safe mode, a small cluster of dots symbolising buckshot to indicate the semi-auto position, and a larger cluster of dots to indicate the fully automatic position.
The magazine release can be found in front of the trigger guard and includes two paddles, one on either side to permit ambidextrous operation. This mag release can either be depressed with the thumb as you remove your mag, AK style, or pushed forwards with the trigger finger as you might with an M4/AR15. The mag release is very well positioned and marks the SGR-12 out as an advanced design with some careful consideration given to ergonomics.
At the rear of the receiver, we can find a SCAR style sling plate with loops on either side allowing for both left and right-handed users to sling the SGR-12 with no additional parts needed. This sling plate can be used either with a single point sling for more convenient CQB carry, or a two-point sling for more easily slinging the SGR on your back using the front sling point found on the left side of the handguard. Both the front sling point and rear sling plate are constructed from aluminium to provide the strength necessary to support the weight of the shotgun whilst minimising excessive weight which results from alloy parts.
Following the receiver, we reach the stock of the SGR-12 which is a fixed stock of a modern design, with a similar silhouette to the M4/AR15 crane stock but with a raised cheek piece for effective sight alignment and comfort, and a thick rubberised butt pad to ensure the SGR-12 stays tightly gripped into your shoulder in any weather condition, and either with or without body armour.
Within the stock is where the battery compartment of the SGR-12 is located, and it can be accessed by pushing the well-concealed release button at the toe of the stock, after which the butt plate can be lifted upwards and then pulled off to the rear. Inside you will find a Deans battery connector to which you connect your battery. For the CM.102 SGR-12, we recommend an 11.1V LiPo battery in stick configuration for a comfortable fit. During testing, we discovered that the SGR-12 does not like 7.4V batteries due to the extra power required to operate its larger and more complex gearbox so we recommend an 11.1V to give it the oomph it needs. Battery space is very limited due to the design of the battery compartment so we recommend a PDW type stick battery of between 600 and 900mAh capacity.
SGR-12 Licensed by EMG
Aluminum upper & handguard & Full metal gear box construction
Electric tri-shot shotgun
Semi/Full automatic fire modes
Not suitable for 7.4V batteries - 11.1V LiPo required
Flip-up aperture iron sights included
Ergonomic Tango Down style pistol grip
Ambidextrous magazine release
Sound enhancing shotgun style muzzle choke
Ambidextrous sling plate at the rear of the receiver
Additional sling point on the handguard
Folding charging handle - Provides access to the HOP-up adjusters
Authentic mock 12GA shotgun shells visible in the magazine
Selector located similarly to an AR15 - Familiar operation for M4 users
Triple wheel adjustable HOP-up system - Adjust each barrel separately
Aluminium M-LOK monolithic handguard/upper receiver
20mm Picatinny rails on the handguard and receiver - Ready for accessories!
Feeds from unique AA-12/SGR-12 magazines and drum magazines
Power : ~330fps
Weight : 3250g
Length : 732mm
Hop-Up : Adjustable
Magazine Capacity : 100 rounds