D20:Crossbow, Heavy Weapon

You draw a heavy crossbow back by turning a small winch. Loading a heavy crossbow is a full-round action that provokes attacks of opportunity.
Normally, operating a heavy crossbow requires two hands. However, you can shoot, but not load, a heavy crossbow with one hand at a ?4 penalty on attack rolls. You can shoot a heavy crossbow with each hand, but you take a penalty on attack rolls as if attacking with two one-handed weapons. This penalty is cumulative with the penalty for one-handed firing.

Heavy Crossbow Material Enhancements

Material	Average	Masterwork1	Hardness	hp	Special
Steel and Wood	50 gp	350 gp	5	5	?
Adamantine	?	3,050 gp	5	6	?
Crystal, Deep	?	1,050 gp	10	15	Psionic
Crystal, Mundane	?	{{{mccost|350 gp}}}	8	12	No rusting, not metal
Darkwood	?	430 gp	5	5	1/2 weight
Iron, Cold	n/a	n/a	n/a	n/a	?
Mithral	?	n/a	n/a	n/a	?
Silver, Alchemical	n/a	n/a	n/a	n/a	?
Masterwork weapons have a +1 enhancement bonus on attack rolls. The SRD gives neither this value nor a means to accurately determine it.

Magical/Psionic Weapon Enhancements

Bonus Value	Additional Cost1	Hardness Increase2	Additional hp2
+1	+Template:formatnum: -- template expr: 40 50 gp	+2	+10
+2	+Template:formatnum: -- template expr: 160 50 gp	+4	+20
+3	+Template:formatnum: -- template expr: 360 50 gp	+6	+30
+4	+Template:formatnum: -- template expr: 640 50 gp	+8	+40
+5	+Template:formatnum: -- template expr: 1000 50 gp	+10	+50
+6	+Template:formatnum: -- template expr: 1440 50 gp3	+12	+60
+7	+Template:formatnum: -- template expr: 1960 50 gp3	+14	+70
+8	+Template:formatnum: -- template expr: 2560 50 gp3	+16	+80
+9	+Template:formatnum: -- template expr: 3240 50 gp3	+18	+90
+10	+Template:formatnum: -- template expr: 4000 50 gp3	+20	+100
+11 or more	+ bonus × bonus × Template:formatnum: -- template expr: 400 50 gp	+ enhancement bonus × 2	+ enhancement bonus × 10
Increase total cost for magical enhancement by 2,000 gp for cold iron weapons. Unlike the additional cost, the increase the weapon's hardness and hit points are only gained from its enhancement bonus, not its special abilities. If the weapon has a magical bonus greater than +5 or a special ability worth more than +5, the weapon is epic. Multiply magic cost by 10.

• Bolts, Crossbow
  
• Weapon Qualities
  
• Magic Items: Weapons
  
• Wikipedia: Crossbow
  

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System Reference Document -> Equipment (SRD) -> Weapon Descriptions