In 1991 the Izhmash factory in the city of Izhevsk began full-scale production of a modernized variant of the AK-74?the AK-74M (M - Russian: Модернизированный; Modernizirovanniy or "modernized") assault rifle that offers more versatility compared to its predecessor. Apart from several minor improvements, such as a lightened bolt and carrier assembly to reduce the impulse of the gas piston and bolt carrier during firing, the rifle features a new glass-filled polyamide stock that retains the shape of the original AK-74 fixed laminated wood stock, but side-folds to the left like the skeletonized AKS-74 buttstock. Additionally the AK-74M features an improved muzzle device, a reinforced smooth dust cover and a redesigned guide rod return spring retainer that allows firing the GP-25, GP-30 and GP-34 underslung grenade launchers without having to use the previously necessary additional receiver cover fastener. Each AK-74M is fitted with a side-rail bracket for mounting optics. The AK-74M would have been adopted by the Soviet Union as the standard service rifle, and has been accepted as the new service rifle of the Russian Federation.
GHK are known in the airsoft market for making high end quality gas blow back airsoft guns, they may not be the most affordable option but you can be assured your purchasing quality products. Hop up chamber is easy to access to which can be accessed via the top rail cover towards the front.