Hello... According to: 10.1 HE, or High Explosive Firepower, may be used specifically against Light Armor vehicles... So, an M-113 .50 caliber M2 machine gun (HE Range/FP/ToHit: 2/1/5) could punch any Light Armor target (like Bmp, M-3, Marder, etc etc)...but is a .50 cal Mg (or soviet Brdm-2 14.5 mm KPVT heavy machine gun; HE Range/FP/ToHit: 2/1/5) really so effective against Bmp, Marder or M3 armor? Honestly i can not answer it but i find it a bit exaggerated: whereas it looks fine that a Marder 20mm rapid fire cannon or a M3 Bradley 25mm are able to worry a thin-skinned vehicles, it seems very unlikely (IMHO) that less caliber MGs (such as M133 or Brdm-2 Mgs , for example) can damage Bmp, Marder or M3 armor. I know that game is printed and it is near to be shipped and 99% is done but following optional rule could be easily added to reflect my observation: 10.1.1 (Opt.) HE, or High Explosive Firepower, may be used against Light Armor vehicles only if its range is more than 2. HE Firepower with a range of 2 or 1 can not be used against Light Armor vehicles. What do you think about? Edit: i have had occasion to better verify M2 or KPVT efficacy: at 2 hexes range (300 meters) they are able to disabling most Soviet light armor indeed ( BMP, BTR, and BRDM series vehicles), so my observation was not so justified ...even if i doubt it's the same against Marder or Bradley frontal armor too.