psteinmayer wrote on Mar 15^th, 2019 at 9:49pm:

My rear sight is the standard 03A3 rear sight.  In order to shoot in a CMP match "As Issued", it can't be altered. . .

But the CMP Long Range Matches aren't "as-issued". (You're shooting a Krag in the as-issued matches, right?)

Following text is copied from the 2019 Long Range Schedule -

2019 National Long Range Match Schedule
Monday, 5 August
9:00AM        Viale Memorial Match         Viale Range
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Iron Sights, Service Rifle or Palma Rifle
Critchfield Memorial Match
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Iron Sights, Service Rifle or Palma Rifle

Tuesday, 6 August
9:00AM        Kerr Memorial Match          Viale Range
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/Any Sights, Service Rifle or Palma Rifle
Henry Memorial Match
Unlimited Sighting Shots & 20 Record Shots in 30 minutes @ 1000 Yards
Match Rifle/ Any Sights, Service Rifle or Palma Rifle

And from the 2019 Highpower Competition Rules -

5.10 CMP Long Range Courses
The CMP Long Range Courses are CMP highpower rifle events that are  conducted during  the  National  Matches  and  may  be  conducted  in  other CMP-sanctioned competitions. Competitors may use the Service Rifle (Rules 4.1.1, 4.1.3, 4.1.4), Alternative Rifle (Rule 4.1.2),  Match Rifle (Rule 4.1.5)  and the Long Range Service Rifle (Rule 4.1.6).