It must be emphasized that all semi-auto rifles require constant cleaning and maintenance and that most of stoppages mentioned elsewhere are the result of the shooter's negligence or lack of knowledge of his rifle. All rifles whether semi-auto or repeating rifles, should be cleaned at the end of a day firing and special care must be taken after firing with blank cartridge.

The DR200 needs to be field-stripped for this maintenance. Maintenance procedure is as follows.

1) Use the Barrel cleaning brush, oiled with the special rifle bore oil provided, and pass through the barrel several times.

2) Follower this by pulling through two or three dry rags.

3) Clean the chamber with the cleaning brush provided for this purpose.

4) Clean the bolt and bolt carrier.

5) Clean firing pin and firing pin hole.

6) Clean underneath the extractor claw, without stripping it.

7) Remove the gas regulator, the piston and its spring and carefull.v clean these pans, as they are exposed to gas fouling.

8) Clean the gas cylinder and wipe with a slightly oiled rag.

9) Very slightly lubricate the moving parts of the mechanism.

Lubrication

- When reassembling lubricate where required.

- Apply oil to constant friction like bolt carrier, bolt, trigger mechanism, barrel extention.

- The piston head should not be oiled.

Lubricate: bolt, bolt carrier, barrel extension, trigger mechanism, recoil spring, ejector and spring.

Unlubricated: barrel, piston head, gas regulator, gas cylinder, outside of the rifle.