What Is Assault With a Deadly Weapon in Colorado?

In Colorado, assault with a deadly weapon is not its own crime. Prosecutors charge it under the state’s first or second degree assault statutes, and the presence of a firearm, knife, or other deadly weapon turns the case into a “crime of violence” with mandatory prison time of 5 to 32 years depending on the severity of the injury.¹ Probation is off the table. So is county jail. The judge has to send a convicted person to the Department of Corrections.

How the Charge Gets Filed

Which degree you face depends mostly on how badly the other person was hurt.

First degree assault applies when someone intentionally uses a deadly weapon to cause “serious bodily injury.” Colorado defines that as harm carrying a substantial risk of death, a risk of serious permanent disfigurement, prolonged loss or impairment of a body part or organ, broken bones, second- or third-degree burns, or a penetrating knife or gunshot wound.² It is a Class 3 felony.³

Second degree assault covers a wider range of cases. It applies when someone intentionally uses a deadly weapon to cause ordinary “bodily injury,” meaning any physical pain, illness, or impairment of a physical or mental condition.² A cut that needs stitches but heals cleanly, or a concussion that fully resolves, can support this charge. It also covers recklessly causing serious bodily injury with a deadly weapon, which catches defendants who did not intend serious harm but used a weapon in a way that foreseeably produced it.⁴ Second degree assault is a Class 4 felony.

What Counts as a Deadly Weapon

Colorado’s definition is broader than most people expect. Any firearm, loaded or not, is automatically a deadly weapon.² An unloaded handgun qualifies the same as a loaded one.

Everything else depends on how it was used. A knife, a bludgeon, or any other object counts as a deadly weapon if the way it was used or intended to be used was capable of causing death or serious bodily injury.² A kitchen knife on a counter is not a deadly weapon. The same knife swung at someone’s neck is. A baseball bat, a heavy rock, a steel-toed boot, and even a car can qualify when the facts show the item was used in a way capable of killing or seriously injuring someone. Prosecutors routinely argue everyday objects meet this definition, and courts decide it case by case.

Mandatory Prison Sentences

Both degrees of assault with a deadly weapon are “crimes of violence” under Colorado law, and that designation drives the sentencing.

A first degree assault conviction requires a sentence of 10 to 32 years in the Department of Corrections, followed by a five-year mandatory parole period. Fines range from $3,000 to $750,000.⁵¹

Second degree assault carries a mandatory prison term of 5 to 16 years with three years of mandatory parole on release.⁶¹ Fines run from $2,000 to $500,000.⁵

The judge cannot substitute probation, community corrections, or county jail time once the crime-of-violence finding is in place. That is what makes a weapon so damaging to the case: it removes the sentencing options a judge might otherwise consider.

Heat of Passion Can Reduce the Charge

Both statutes contain a safety valve. If the assault was provoked by the victim’s conduct in a way that would cause an irresistible reaction in a reasonable person, the offense drops to a lower felony class.

Heat-of-passion first degree assault becomes a Class 5 felony, which carries a presumptive one to three years in prison, two years of mandatory parole, and fines from $1,000 to $100,000.⁵ Heat-of-passion second degree assault becomes a Class 6 felony with a presumptive range of one year to 18 months, a year of mandatory parole, and the same fine range.¹

Proving it is hard. The provocation has to be extreme enough that the law accepts a reasonable person could lose self-control, and the defendant must have actually been in that state at the moment of the assault. A delayed or planned response will not qualify.

Menacing: When No One Is Hurt

If a weapon is brandished or pointed at someone but no injury occurs, the charge is usually menacing, not assault. Menacing means knowingly placing another person in fear of imminent serious bodily injury through a threat or physical action.⁷ Without a weapon it is a Class 1 misdemeanor. With a firearm, knife, or bludgeon it is a Class 5 felony, meaning one to three years in prison, two years of mandatory parole, and fines up to $100,000.⁵

One detail trips people up: a simulated weapon counts. The statute specifically covers a simulated firearm, knife, or bludgeon.⁷ Pointing a realistic-looking toy gun at someone to frighten them can produce a felony conviction. Menacing and assault charges often appear together in the same case, with menacing covering the brandishing and the assault count covering the injury that followed.

Self-Defense

Colorado permits the use of physical force to defend against what you reasonably believe is the unlawful use or imminent use of force. The force you use has to be proportional to the threat.⁸

Deadly force has a higher bar. You can only use it if you reasonably believe lesser force would not be enough and you face imminent danger of being killed or suffering great bodily injury. It is also permitted against someone committing or about to commit a burglary in your home or business, or during a kidnapping, robbery, or sexual assault.⁸

The defense has limits. You cannot claim self-defense if you provoked the confrontation intending to cause harm, or if you were the initial aggressor. The one exception: if you clearly withdrew and communicated your intent to stop fighting but the other person kept attacking, the defense can apply again.⁸ Colorado also bars any self-defense claim based on a victim’s gender identity or sexual orientation, including unwanted romantic advances.

What Follows a Conviction

The prison term is only part of the sentence.

You Lose Your Firearm Rights for Life

Federal law permanently prohibits anyone convicted of a crime punishable by more than one year in prison from possessing firearms or ammunition.⁹ Every version of assault with a deadly weapon in Colorado crosses that threshold. Violating the ban is itself a federal felony carrying up to 15 years in prison.

Voting Rights Return After Release

Colorado restores voting rights the moment a person is released from incarceration. You can register and vote while on parole, and paying restitution is not a condition of eligibility.¹⁰ Registration is not automatic, though. You have to re-register through the normal process.

Employment, Housing, and Licensing

A violent felony conviction creates barriers that can last for years. Background checks are standard with most employers and landlords, and a crime-of-violence conviction is one of the hardest marks to overcome. Some professional licenses may be unavailable. These collateral consequences often outlast the prison sentence itself.

1
Colorado Department of Human Services. Felony Sentencing Guidelines
2
Justia. Colorado Code 18-1-901 – Definitions
3
Justia. Colorado Code 18-3-202 – Assault in the First Degree
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Justia. Colorado Code 18-3-203 – Assault in the Second Degree
5
Justia. Colorado Code 18-1.3-401 – Felonies Classified – Presumptive Penalties
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Justia. Colorado Code 18-1.3-406 – Crime of Violence
7
Justia. Colorado Code 18-3-206 – Menacing
8
Colorado Public Law. Colorado Revised Statutes 18-1-704 – Use of Physical Force in Defense of a Person
9
Office of the Law Revision Counsel. United States Code Title 18 Section 922
10
Colorado Secretary of State. Voters with Convictions FAQs