B-33 dust cover with integrated Picatinny rail is compatible with all models of Kalashnikov assault rifle and carbines built on the basis of AK.  Allows you to install any sighting devices that mount on Picatinny rail.  Provides consistency of the center of impact on the installed sights, with repeated opening and closing.

The B-33 dust cover is a milled product made of aluminum alloy D16T, mounts on B-10M, B-10U, B-10L, B-30 or B-30U handguards by five screws (four screws form the four points of support for the B-33 on the handguard and one screw forms an additional (fifth) point of support, fixing the B-33 on the receiver) and forms a Picatinny rail with a length of 170±5 mm above the barrel of AK that does not overlap the line of sight when using standard mechanical sighting devices. 

Specifications:

Material: D16T aluminum alloy

Weight: 215 + 10 g

Overall dimensions: (300х50х37) ± 2 mm

Operating temperature range: from -50 ° С to + 50 ° С
 
In the kit:

B-33 dust cover	1 pc.
Back of the return mechanism + guiding rod	1 pc.
M5x7 screws	4 pcs.
Manual	1 pc.

To install the bracket above the B-33 receiver on a weapon, you need:

1. Remove the standard receiver cover, remove the standard return spring assembly, put the check mark on the gas pipe retainer and the rear sight to the upper position.
2. Unscrew, with the included Allen key, the mounting screws from the bracket above the B-33 receiver, and then unscrew the screw from the insert.
3. Install the "B-33" rail  in the grooves of the already installed bracket “B-10M" or "B-30" and fasten the four mounting screws, then install the steel insert and tighten the insert screw (it is advisable to install it on the thread lock). Then tighten the four screws that secure the cover to the handguard, then install the bolt frame and the return spring assembly included in the "B-33" kit, close and lock the "B-33" using the return spring retainer.

It is not recommended to use the "B-33" rail in conjunction with a damper.

More detailed illustrated instructions are in the operation manual.