Valken 42" Single Rifle Gun Bag 5KU this makes it possible to

this makes it possible to change the firing sequence giving it the ability to operate in both true closed bolt as well as "AEG" mode

14mm negative threading

Low Profile Elevation Turret with a Bullet Drop Compensator (BDC) calibrated for M193 55gr

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Valken 42" Single Rifle Gun Bag 5KU this makes it possible toThe Valken 42 Single Gun Case is a soft gun case built to transport your firearms or airsoft guns. This airsoft gun case fits one rifle up to 42 in length and holds up to five M16 M4 style magazines. The interior is fully padded and lined with soft loop fabric, and includes 2 hook and loop closure straps to help secure your gun during transportation. The Valken 42 single gun case also offers a full length lockable zipper that keeps the gun bag closed