RWS has been made by several other air gun manufactures. Diana has made several for them over the years. Right now I think it's the Diana RWS 350 Feuerkraft that is rated at 1250 FPS. But if you are looking at power not speed, then the RWS CA-715 fired a .22 cal at 1200 FPS. It look just like a ShinSung Career 707 made in Korea. RWS also had a CA-707 that fired a 9MM pellet.
Not designed for this type of modificaiton.
What condition is it in. That determines the value.
Please state the model you are inquiring about. Is this a C02 or a PCP (Precharged Pneumatic) air rifle?
What condition is it in. That determines the value.
An authorized repair center might have what you want.
The Dianawerk / RWS target model 100 .177 cal was made between 1989-98. Its a very expensive rifle.
Yes Diana RWS rifles are still made. See the link below.
The Lincoln Jeffries air guns were the forerunners of the RWS airguns. They were manufactured from the late 1800's and into the 20's when they became RWS. Today the grandson makes the Marksman brand airgun pellets
If you are asking "WHAT" not "Where" is the most powerful under lever .177 air rifle. Then I suggest the "Hatsan Torpedo 150 air rifle." I comes in at around 1250 FPS where as most of the other under levers fire at around 950 to 1000 FPS. However Under levers are not the most powerful air rifles. The PCP (PreCharged Pneumatic) Class of air rifles are the most powerful air rifles. An "Air Force Condor and the Evanix Rainstorm" fires a .177 cal pellet at 1300 FPS.
The major air rifle manufacturers are Gamo, Crosman, Benjamin, UTG, Daisy, RWS, Beeman, Mendoza, King Arms, Hornady, Beeman, Air Arms, Air Venturi, etcetera.
I would use Crosman Pellgun oil. Or RWS air gun oil.
I believe you are asking about a RWS Diana 45 model. It was manufactured from 1988 to 2000. I found some information on the Links Below. Today UMAREX is the distributor for RWS. I would try to contact them (At the link below) and ask for a manual.