Daniel Defense® MK18 SA-C19 CORE™ 
Specna Arms  presents the CORE™ line with the HAL system™
The trigger control system aids in the operation of the replica, and allows programming of functions easily using the trigger and selector.

Features of the HAL™ system:
-trigger sensing based on magnetic sensors and Hall effect
-active brake
-binary trigger
-adjustable trigger sensitivity (5 levels from 20 to 100%)
-adjustable pre-cocking (6 levels)
-programmable AUTO fire modes (full auto, semi, 3-rd burst, 5-rd burst)
-programmable SEMI fire modes (semi, binary, AUG, sniper)
-easy programming via trigger
-low battery alarm
-compatible with brushless motors
 
**The AUTO function fires a 3 round burst first then fires Full Auto.
 
The rifle is manufactured in cooperation with the American brand EMG Arms. It has licensed markings Daniel Defense® - a US-based firearms manufacturer that has specialised in supplying a variety of AR15 variants and accessories since 2002, including for USSOCOM special orders. 
The body, the slide including the battery housing of the enlarged SF-type stock as well as the pistol grip are made of nylon fibre-reinforced polymer plastic. Other components such as, for example, the barrel, RIS front, flame suppressor, enlarged reloading handle and tactical sling assembly have been made of metal (all screws, pins, shell ejection window and dummy lock are made of steel). 
The rifle has been very well-fitted the user will not experience any play between the lower and upper parts of the body. The use of a body made of lightweight plastic has allowed for a reduction in weight, making it ideal for dynamic games or long milslims. What's more, the fibreglass reinforcement also makes the body more durable than polymer and metal bodies. 
The replica uses the quick spring change system, ESA™. This allows quick and efficient adjustment of the replica's power to the conditions expected on the field of play without the need for access to a workshop or a number of specialised tools - simply unscrew the stock guide to reveal access to exchange the spring without having to pull out, or disassemble the gearbox. 

The advantages of the system ESA™ are difficult to overestimate. In the light of the arrangements that exist within the environments themselves, this system guarantees the user considerable possibilities and a great deal of freedom. The ESA™  system allows with a minimum of time to replace the mainspring and thus to adapt the replica's discharge velocity to the area of play so as to guarantee an ideal compromise between the effectiveness of the fire and the safety of oneself and other players.
The replica has been fully adapted to work with batteries of the type LiPo and LiFe. With a base initial discharge velocity of the order ~380 FPS guaranteed by the pre-installed mainspring, the replica is perfectly suited for medium range operations. A M90-type spring is also included, which allows the initial velocity to be reduced to ~310 FPS  making the replica perfectly suited for short-range or indoor operations.
The gearbox conceals 8-millimetre slide bearings and the supported steel gears mounted on them. The system is secured by four anti-reverse pawls. The lightweight, polycarbonate plastic piston is provided with a full steel bar  to increase its strength. It also uses a cylinder type 0 and steel cut-off lever, as well as a precision rotary hop-up chamber. The strength of the parts allows it to work with M140 springs.
The finely crafted Rotary Hop-Up Rotary Chamber  perfectly matches the high quality 6.03mm precision barrel. The use of a precision barrel has a positive effect on the range and accuracy of the replica. It is important to remember to use high quality 6mm ammunition. 
The SA-C19 carbine replica is equipped with a front rail in the RIS22mm mounting system. The barrel ends with a standard exhaust device mounted on a thread 14mm CCW. Folding sights are located on the back of the replica.
The kit includes a magazine hi-cap S-MAG with a capacity of up to 380 rounds. The S-MAG is an exclusive polymer magazine designed by Specna Arms. Notable for its distinctive texture composed of Specna Arms logos. The S-mag ensures trouble-free ball feeding, even at high ROF.
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Package include:
S-Mag Hi-Cap Magazine
QC certificate
Instruction
Replica