Here is what I know from a spec. sheet on RWS 48 and RWS 52. Aside from the stocks and the length they are the same gun. I have an RWS 48 in .177 and love it.
Specifications:
Model: RWS 52
Caliber: .177
Velocity: 1100 FPS
Ammo Type: Pellet and Lead Ball
Body Components: Wood Stock with Metal Barrel, Receiver and Cocking Arm.
Overall Length: 43.50"
Barrel Length: 17"
Barrel Style: Rifled
Fire Mode: Single Shot
Cocking Effort: 39 lbs.
Trigger Pull: 3.3 lbs.
Trigger Adjust: Two Stage Adjustable
Action: Side Lever
Power Plant: Spring Pneumatic
Gun Weight: 8.5 lbs.
Front Sight: Adjustable for Elevation
Rear Sight: Adjustable for Windage and Elevation
Warranty: Limited Life Time
Country of Origin: Germany
Scope Recommendation: 300, 450
RWS Pellet Recommendation: Meisterkugeln, Superdome, Supermag
Specifications:
Model: RWS 48
Caliber: .177
Velocity: 1100 FPS
Ammo Type: Pellet and Lead Ball
Body Components: Wood Stock with Metal Barrel, Receiver and Cocking Arm
Overall Length: 42â€
Barrel Length: 17â€
Barrel Style: Single Shot
Fire Mode: Single Shot
Cocking Effort: 39 lbs.
Trigger Pull: 3.3 lbs.
Trigger Adjust: Two Stage Adjustable
Action: Side Lever
Power Plant: Spring Pneumatic
Gun Weight: 8.5 lbs.
Front Sight: Adjustable for Elevation
Rear Sight: Adjustable for Windage and Elevation
Warranty: Limited Life Time
Country of Origin: Germany
Scope Recommendation: 300, 450
RWS Pellet Recommendation: Meisterkugeln, Superdome, Supermag