With a 7.62x51mm self-loader, there really is no need to have a secondary carbine. You drive it like a battle rifle, albeit a rather heavy one. Part of the silliness is the enormous glass that is so popular with European militaries. Their damned scopes are 15 inches long and weigh a kilo. You really will never fully exploit a 50mm objective, let alone a 56mm. They are unnecessary with in line thermal/NV/hybrid imagers.They also run big 34mm tubes with inordinate amounts of drop adjustment and enormous amounts of erector (8xnow). A 42mm objective, 30mm tube with 6x erector is more than enough and keeps the weight and cost down. Having used offset RDS sights for close quarter engagements, they are effective and for me better than the piggybacks.
The one thing I do not like is the weight of a Harris bipod. Bipods are a necessary evil, primarily for hasty supported positions. Unfortunately, none of the current crop of bipods is as light and robust as they should be. The Harris is successful because the spring loaded legs allow it to flex mechanically.
Edited by Simon Tan, 01 August 2017 - 0022 AM.