M40A3, has doubles alloy and polymer design with lightweight tough stock that houses the barrel and bolt action. Accurate to the real design, the Airsoft M40A3 uses a lightweight and durable polymer stock, which holds the alloy barrel, receiver and bolt.
A RIS rail (20mm) is on the upper end of the receiver and will let users to fit attachments such a scopes and The lower end of the hand-guard has section of 20mm rail which will allow you to fix other accessories and most importantly a bi-pod. The stock has an adjustable cheek rest giving a more comfortable sniping position. The adjustments can be done with the hands and this cuts out fiddling around with Allen keys. The stock length is also adjustable giving a overall comfort to ensure the best position for aiming.