Can someone advise on the below points;
1. Recoil seems to be high, is it feasible to add some kind of foregrip to it?
2. I read such rifle are mostly used in DMR role, so the possibility of making standard infantry rifle by attaching grenade launchers etc is it possible?
3. Any idea how an infantry squad should look in the near future after acquisition of negev,ak 203,sig?
1. Vertical foregrip has already been seen with the sig 716 in indian service. But solely a vertical foregrip cannot reduce recoil. Proper recoil management training, proper muzzle device, proper distribution of weight and finally the shooters proficiency with the rifle coupled with proper firing stance may help in improving the recoil.( The choice of ammo also matters. Indian army uses the LMG ammo which gives more kick.)
2. The rifle can be used in any environment except CQB (due to its length). Normal infantry engagement takes place at atleast 200-300+ meters range. So range would not be a matter (considering the infantry does not commonly engage in CQB under 50 meters range). Overall length of a fully extended m27 rifle is equal the length of the sig716i (940mm).So the length should be ok for infantry purpose (considering the US Marine infantry uses the m27 rifle in standard infantry role). Empty weight of the rifle is 3.85 kg which is also ok. The only thing lacking is the suppressive fire which can be fulfilled by the Negev lmg. And yes attaching an underbarrel grenade launcher to an ar10 rifle is pretty much possible. If maintained properly, the sig716 can definitely be employed for infantry roles.
3. No Idea since we do not know the number of personnel in the squad, the operational environment under which the squad would be deployed or the extent of availability of these firearms to the squad.
Hope this answer serves your purpose.