Return to the ASMRB index page.

ASMRB House Rules

Version 1.5
January 9, 2000

7.0 Targeting Aids for Ranged Weapons

A variety of methods and devices are available to improve the accuracy (both OCV and Range Mods) of small arms and some archery weapons. Remember that Brace and Set maneuvers each normally double the Range Mod of the weapon. The following chart summarizes the game characteristics of various features and accessories:

No Stock:attacker does not receive x2 Range Mod from Brace, but still receives OCV bonus for Brace; mounted weapons (on tripods, etc.) are exempt from this rule (typ.: pistols, folded stocks when folded)
Bipod or Tripod:only subtract 1/4 Range Mod penalty for autofire (instead of 1/2) when employed (which is usually when prone, ergo braced)
Rangefinder:+1" Range Mod (or +10% Range Mod, if larger) for Set or Brace, only when using sights which provide a Range Mod bonus (note that this is the measured range bonus in general)
Gyroscopic Stabilization:+1 OCV and +3" Range Mod (or +50% Range Mod, if larger) for Set or Brace; no 1/2 Range Mod penalty for autofire (typ.: modern tank guns, recent attack helicopter turrets)
No Sight:attacker receives only +1 OCV for Set and Brace together (typ.: zip guns, some pocket pistols)
Fixed Sight:+1 OCV for Set or Brace (typ.: most pistols)
Battle Sight:+1 OCV for Set or Brace, +1" Range Mod for Set and Brace (typ.: SMGs & some assault rifles)
Standard (or Leaf) Sight:+1 OCV and +1" Range Mod (or +10% Range Mod, if larger) for Set or Brace (typ.: unscoped hunting rifles, older infantry rifles)
Unitary Scope:+1 OCV and +1" Range Mod (or +10% Range Mod, if larger) for Set or Brace, Set becomes a 1/2 Phase maneuver (typ.: some very modern assault rifles, SMGs, and shotguns)
Telescopic Scope:+2 OCV and +2" Range Mod (or +25% Range Mod, if larger) for Set or Brace
Electronic Scope:+3 OCV and +3" Range Mod (or +50% Range Mod, if larger) for Set or Brace; already includes Rangefinder effects (typ.: modern tank gunnery fire control systems)
Cyberlink to Smartgun:as 'Electronic Scope' plus Set becomes a Ø Phase maneuver
Dot Projector:Set becomes Ø Phase action (still on one target only);
		Rvis, meters = 1000 * (output, watts)0.5
in daylight; for visibility in other conditions apply the following multipliers to the 'daylight' range:
HeNe, circa 1970, redx0.45output < 0.5 mW
HeNe, circa 1995, redx0.45output < 3 mW
diode, ca. 1990, redx0.25output < 5 mW
diode, ca. 1995, yellowx0.9output < 5 mW
diode, ca. 2000, greenx1output < 20 mW
diode, cheap (any date)x0.5 
YAG/diode, ca. 1990, redx0.25output < 25 mW
YAG/diode, ca. 1990, greenx0.94output < 25 mW
YAG/diode, ca. 2000, redx0.25output < 250 mW
YAG/diode, ca. 2000, greenx0.94output < 250 mW
shade or cloudyx2 
fully overcast + shadex4 
indoors, brightx10 
indoors, dimx30 
night, moonlightx100 
night, darkx200 
total darkx400 

A PER roll is needed to see the projected aimpoint of a dot projector (in combat). Outputs listed are for typical scope sized systems; and might be up to twice as much for larger/bulkier devices, and halved for small 'penlight' sizes. Future laser dot projectors (post 2010) are likely to be color agile systems with high outputs, possibly up to many whole Watts -- who can say?

Helium-neon (HeNe) lasers are the earliest dot projectors available; they break easily and have low output power, but do have excellent beam characteristics. Output doubles from 1970 to 1980, then levels off until circa 1995. 'Smaller' sizes of HeNe lasers are not available until 1995.

Diode laser output should double every 1.5 years from the date of introduction to a maximum of about 500 milliwatts. YAG/diode lasers are generally 10-20 times more expensive than diode laser of similar size, but have higher output power and better beam characteristics; they are also more fragile. Output of YAG/diode lasers doubles every 3 years from circa 1990 to circa 2000. Note that weapons with 'fixed' dot projectors will not obtain much benefit beyond 20 times the 'usual' Range Mod of the weapon, due to bullet drop.

Example: a diode laser dot projector, from circa 1990, produces just under 5 milliwatts of coherent red light. It has a visibility of about 17 meters in full daylight, . If attached to a typical -1/3" Range Mod pistol, with a fixed mounting system, it would be useful out to 60" at most in less well lit conditions. A 'cheap' version of this same dot projector would only have an 8.5 meter visibility in full daylight.

Return to the ASMRB index page.

Document last modified Friday, June 01, 2001