Nah, the A5 was outdated even by WWI. Winchester was selling the Military on their Model of 1918 Sniper scope mounted on a Sporterized WRA 1917 rifle.
Springfield Armory was focused on going to German Glass (Zeiss and Goerz) on the M1903 until WWI started and fell on WRA as the backup. Which even to WRA they state the A5 was outdated as early as 1917 that I have seen. Winchester states many times during the war that we will sell you these A5's as a tempory filler until the new model of 1918 scope is finished.
But even the Model of 1918 scope by WRA was copied off the German Glass of the time. It's just the war ended without it being finished and Frankford Arsenal picked up the design off WRA but couldn't get a version that could pass the trials either. And it was finally scraped in the mid 20's.
But if WWI hadn't started so early. You would have seen a M1903 with German Glass as the sniper. They were focused on it till the war started.