Focused on long range firepower, snipers/marksman and ditch the GPMG, split the role between the 50 cal Browning and a return to a modern Bren type LMG (Negev NG7 or Pecheneg) chambered to 7.62x51mm, with a very high ratio of guns to infantry of say 1 to 3-4.
Some of your assumptions are fundamentally misguided and wrong
GPMG has two roles:
1. Light role: 0 – 800m,
2. Sustained Fire Role:
a. 800m – 1800m direct role using iron sights
b. 1800m – 3000m indirect role using C2 sight and Map predicted fire (to a degree) SFMG guns always operate in pairs,
a. Normal RoF: 100 rounds per minute
b. Rapid RoF: 200 rounds per minute
c. Front Line: 5000 rounds per gun
d. When mounted in SFMG role can rotate 360 degrees.
e. SFMG have three positions in Defence - Primary posn, Secondary and alternate posn.
L7/Mag 58 is the principle Light Infantry Support weapon due to the fact it is so versatile when sighted correctly to maximize its beaten zone for mutual support to others.
M2QCB – Point Weapon,
Used in the Point role only to take out bunkers, other crew served weapon systems and light vehicles. Due to the massive vibration when fired it beaten zone is unpredictable even when used with a soft mount. Combine this weapon with a Area weapon like the HK GMG and you now have the Battalion heavy hitters.
a. Have three position just like the SFMG.
LSW C9 7.62mm:
Light role only: 0 – 800m 3 to 5 round burst only,
a. Front line: 1000 rounds, 600rds carried by the No1 rest spread out amongst the section.
I would keep the AUGs solely for personal defence, of support troops
The Steyr is there to provide accurate individual and section fire,
a. Individual fire: 0 – 300m
b. Section Fire: 300m – 600m,
c. With a 20inch barrel, modern Sights like the ACOG plus a heavier round have given this weapon the ability to engage as an individual wpn way past what is standard practice now into what use to be termed section fire ranges.
Out of all the weapons above the one that would provide you exactly what you are looking for is the one that you have proposed to get rid off.
My Trade is a Rifleman however I have specialised in two roles within my trade and they being Support Weapons and Assault Pioneer both have given me a unique insight into Battalion Battle procedure. In my time I have trained on all Support Weapons from the SF/84mm combo, 50 QCB/40mm GMG combo and finally Javelin.
All these systems have a couple of things in common they require a large logistics tail and a lot of riflemen to provide security, protection and horse power to carry all the ammunition to feed these systems. I can honestly say that your ideas of providing a lot of MG for the FIDF is unworkable no amount of fire is going to keep out a determined enemy. The Falklands is Light Infantry country its restricted terrain at its best there is not enough Islanders to cover all approaches to Port Stanley hence the UK commitment to its defence.
CD