The SR M1903 can be purchased starting in Chapter 2 for 12,000 Pesetas. At this point, you can get the Scope for free with the purchase of the SR M1903 though it is a limited offer. The SR M1903 ...

Scope: Weapon attachment for the SR M1903 Rifle. Found on the same desk where you’ll find the rifle itself. Chapter 2 | Weapon Locations. Punisher MC: Town Hall – Sold by the Merchant for 10,000.

The SR M1903 is a long range precision rifle in Resident Evil 4 remake (Image via Capcom) ... Then purchase the SR M1903, and if you want to add a scope to it, do so for 4000 Pesetas.