It's always irked me the Holographic Sight and the Compact Holosight always had the same concealment values. The word COMPACT is literally in the name of the Compact Holosight so I see no reason why it shouldn't have a slightly buffed concealment value.
This mod does just that by changing the Compact Holosight's concealment from -2 to -1.
Also made using Croveaux's Weapon Rebalance Template.