Arm ST

Cost: [3] (one arm), [5] (two arms), or [8] (three arms) per +1 ST
Arm ST is a physical, exotic advantage where your arms have extra ST relative to the ST of your body. This ST applies only to efforts to lift, throw, or attack with those arms or hands. Four or more arms require buying up ST directly.
==Mouths==
Jaw ST was proposed at http://panoptesv.com/RPGs/Ads-n'-stuff/JawST.html basically being a variant of Arm ST for the mouth, with a -40% No Fine Manipulators discount if the mouth could not manipulate like a hand.
Bite ST in GURPS Martial Arts: Technical Grappling worth a comparison. Which also had notes on Grip ST in respect to arms whose hands hands with NFM, as well as legs and legs with feet that worked like hands.
==References==
* Basic Set 40
==quotes==
===Douglas Cole===
in April 2010 http://forums.sjgames.com/showthread.php?t=68483
Last August, I suffered a three-level disc herniation at C4/5, C5/6, and C6/7. The upshot of all that was a 30% reduction in the strength of my left arm. If I'm normally ST10 or 11, my left arm was 8 or 9, respectively. 
.. 
For cost, I'd probably do something like this (and I like complicated formula):
(1-Sqrt(percent of ST remaining in that arm)) percent discount off Arm ST (5/level)
So my case for 70% ST in one arm would be:
sqrt(.7)= 0.82
1-x = 0.18
Round up for the fun of it, and that's 20%. So 20% of Arm ST is 1 CP.
That's probably about right...70% ST in one arm and 100% in my dominant arm is a quirk level impediment.
===further talk===
September 2010 http://forums.sjgames.com/showthread.php?t=72996
sir pudding " I'd just call -1 Arm ST a Minor Handicap Quirk" .. "It should be [-1] for anything between -1 to -1/4"
Gurps_fan created this table:
[B]Arm ST Both arms One arm[/B]
100% of overall ST† 0 point 0 point
90% of overall ST -1 point 0 point
80% of overall ST -2 points -1 point
70% of overall ST -3 points -1 point
60% of overall ST -4 points -2 points
50% of overall ST† -5 points -2 points
45% of overall ST -6 points -3 points
40% of overall ST -7 points -3 points
35% of overall ST -8 points -4 points
30% of overall ST -9 points -4 points
25% of overall ST† -10 points -5 points
†: RAW value
and subsequently a writeup...
New Quirk: Weak Arm†
-1 point
You have weaker arm(s) in comparison with your overall body ST. Choose one of the following two specialties:
Weak Arm (Both): Both of your two arms have effective ST of the lower of your ST-1 or 90% of your ST. 
Weak Arm (One): One of your two arms (your choice) has effective ST of the lower of your ST-2 or 80% of your ST.
Ejidoth followed:
:If/when a player asks for weaker Arm ST, I use the square root of (Arm ST / Full ST), minus one, convert that to a percentage, and round toward zero to a multiple of 5%. Technically you don't need to round, but it looks more official if you do.
Ze'Manel Cunha proposed using the NFM modifier:
: I use the NFM modifier for body ST which isn't used by arms.
Which isn't really correct, since NFM guys can use arms, they just lack HANDS, so they can still punch and stuff for high damage.
Pudding pointed out a balance problem:
:Having ST 20 [100] and two ST 10 arms [-5] is a net [195]. ST 10 [0] and ST +10 (NFM-40%) [160] is a net [160]. Your method gives much bigger point breaks and it increases with ST.
ZMC countered:
:As it should, you don't have any extra HP on those arms, and you can't use weapons with those arms.
Pudding:
:Arm ST doesn't effect HP at all (Basic page 40).
It really should though!
Kuroshima objection:
The thing with applying NFM to part of your ST is fairier, points-wise. Having your base two arms be weak is definitively worth more than -5 points. Take a centaur, for example. Consider:
a) Weak arms:
ST 20 [100] + two weak arms [-5]. Total 95
b) ST +10 (NFM, -40%) [60]. Total 60
c) Striking ST +10 (Kicks only, -60%) [20]+HP +10 [20]+Lifting ST +10 (Does not affect arm ST, -10%*) [27]. Total 67
*Eyeballed. Most of the usefulness of lifting ST comes from increased encumbrance thresholds, but you lose grappling utility and all arm related feats.
Now tell me there's a functional difference between a and c. b is slightly worse than c, because it would reduce crippling thresholds for the upper body, so it's fair that it costs less points.
==See Also==
* Arm DX
* Extra Arms which has the note on how to create disadvantages basiced on the Weak limitation
* Huge Weapons
* Lifting ST
* No Fine Manipulators
* Strength
* Striking ST
* Tiny Hands, which basically allows -1 to ST to qualify as a quirk no matter what your base ST is, and even comes with a skill bonus.
* List of Advantages
Category:Physical Traits
Category:Exotic Traits
Category:Advantages