Hi-Lux Optics currently offers three period-correct models that would be at home on a M1903A4 and the USMC M1903A1 sniper rifles.
Hi-Lux Optics M82G2 Vintage Rifle M82G2 2.5 x 7/8 Tube Reproduction Scope, Black : Sports & Outdoors
Hi-Lux Optics M82G2 Vintage Rifle M82G2 2.5 x 7/8 Tube Reproduction Scope, Black : : Electronics
Leatherwood/Hi-Lux Optics: 2013
History - Hi-Lux Optics
SHOT 2016] Hi Lux reproduction scopes -The Firearm Blog
Hi-Lux Optics Vintage Scopes Guns And Ammo, 50% OFF
Leatherwood/Hi-Lux Optics: 2013
M1903 Springfield Rifles
Leatherwood/Hi-Lux Optics
Vintage Reproduction Telescopic Scopes - Hi-Lux Optics
Hi-Lux Optics Malcolm 6x17mm Rifle Scopes, 3/4in Tube, Short Telescopic M634181B ON SALE!
Vintage Gun Scopes, 51% OFF