The 15.2mm rifle is the Steyr IWS 2000. It is still in the advanced development stage, and you can find the specs here:
http://www.steyr-aug.com/amr.htmAnother interesting HTI/Anti-Material weapon is the 25mm Payload Rifle, developed by Barrett to fire a "dumb" impact detonating version of the OCSW 25mm Airbusting projectile. It is based closely off of their .50 cal series of rifles, and all one would need to do is use a pre-existing barret O2 model (of which there are several) shorten the barrel (yes, it is signifigantly shorter than the .50 cals) and modify the muzzle brake. Here is a rather in-depth article with several photos (including a close up of the new muzzle brake). Recoil is said to be similar to a 12 guage 3.5inch mag. Very zesty rifle indeed.
http://www.smallarmsreview.com/pdf/payload.pdfAnother topic of discussion I would like people to think about is round damage. In addition to configuring the bullet's properties in the cpp file, I have a script that can do some nifty things with projectiles. It uses a hit EH on the target end to produce some new terminal effects. The problem is, that in order for the "hit" EH to function properly, the round has to do a percentage of damage to the target. Soooo, the bullet should be configured to do enough damage to Tanks and APC's to activate the EH, but not outright destroy them with one shot (although it should be powerful enough to disable a turret in 2-3 direct hits). The script adds particle effects for steel on steel sparks, as well as neat bit that can simulate projectile/spall ricochet inside the vehicle randomly injuring crew members
! Anti-Vehicle Sniping is finaly here for more than light wheeled vehicles! Just think of the added tactical possibilities. A squad is set up in a hasty ambush with HTI sniper support. The HTI snipers see a column of APC's and tanks approacing...While the AT squaddies use thier limited supply of rockets to engage the heavy armor, the snipers begin engaging the APCs going first for the turrets to silence thier weapons, and in the process wound/kill several crew and mech infantry while they are still inside. The remaining survivors are eliminated as the exit their stricken APCs. Also, the script can activate special effects based on the type of vehicle: shooting a chopper will give an excellent chance to induce a tail rotor malfunction script for instance.
-Grendel