Possessing a Glock switch carries up to ten years in federal prison and a fine of up to $250,000, and that is only the floor of the exposure. If the switch is linked to a violent crime or drug trafficking, federal law imposes a mandatory minimum of 30 years. A second such offense means life without parole. How many years in jail someone actually serves for a switch depends on whether prosecutors can tie it to another crime, the defendant’s criminal history, and whether charges pile up for smuggling or manufacturing on top of possession.
Ten Years for Possession Alone
Federal law treats a switch as a machinegun. The National Firearms Act’s definition covers not just full-auto weapons but any part designed solely to convert a firearm into one that fires more than one shot per trigger pull.1Office of the Law Revision Counsel. 26 U.S. Code 5845 – Definitions The ATF applies that definition to Glock switches and drop-in auto sears.2Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Ruling 2006-2 A machined piece of metal or a 3D-printed sliver of plastic is legally the same thing as an automatic rifle.
Two overlapping statutes drive the ten-year maximum. Under the NFA, possessing an unregistered machinegun is a prohibited act3Office of the Law Revision Counsel. 26 U.S. Code 5861 – Prohibited Acts punishable by up to ten years.4Office of the Law Revision Counsel. 26 U.S. Code 5871 – Penalties Under the Gun Control Act, violating the civilian machinegun ban likewise carries up to ten years and a fine of up to $250,000.5Office of the Law Revision Counsel. 18 USC 924 – Penalties The NFA’s own text caps the fine at $10,000, but a general federal statute raises the ceiling on any felony fine to $250,000.6Office of the Law Revision Counsel. 18 U.S. Code 3571 – Sentence of Fine
One point worth clearing up: there is no grandfather clause. Since May 19, 1986, civilians have been barred from transferring or possessing any machinegun not already lawfully owned before that date,7Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts and switches did not exist in the commercial market before then. Every switch in civilian hands is contraband.
30 Years to Life When a Switch Is Tied to Another Crime
This is where sentences balloon past the ten-year headline number. Federal law imposes a mandatory minimum of 30 years in prison when someone possesses a machinegun in connection with a crime of violence or a drug trafficking offense. That sentence runs on top of the punishment for the underlying crime and cannot run concurrently with it. If the defendant has a prior conviction under the same provision, the penalty becomes life without parole.5Office of the Law Revision Counsel. 18 USC 924 – Penalties
Mandatory means the judge cannot go lower. A 20-year-old caught with a switch during a drug deal is looking at 30 years before the drug charges are even weighed. That single provision is why switch cases so often produce sentences measured in decades rather than years.
What a First-Time Defendant Actually Gets
The ten-year figure is a ceiling. Where a defendant lands within it is set by the federal sentencing guidelines. For offenses involving NFA firearms like machineguns, the base offense level starts at 18 on a scale that runs to 43.8United States Sentencing Commission. USSG 2K2.1 – Unlawful Receipt, Possession, or Transportation of Firearms or Ammunition Prior felonies push it higher:
- No prior violent or drug felonies: base offense level 18
- One prior violent or drug felony: base offense level 22
- Two or more prior violent or drug felonies: base offense level 26
Every defendant also falls into one of six criminal history categories, from Category I with no significant record to Category VI with an extensive one.9United States Sentencing Commission. Annotated 2025 Chapter 4 The intersection produces a recommended range. A first-time offender at level 18 faces roughly 27 to 33 months. Someone at level 26 with a Category III record can see a range past six years.
Real cases bear this out. A 19-year-old was sentenced to 27 months in federal prison after pleading guilty to possessing 3D-printed Glock switches.10Bureau of Alcohol, Tobacco, Firearms and Explosives. Nineteen-Year-Old Man Sentenced to 27 Months in Prison for Trafficking 3D-Printed Glock Switches Multiple devices, sales activity, or ties to other criminal conduct increase the offense level. Cooperation and early acceptance of responsibility can reduce it. Judges can depart from the range, but they have to explain why on the record.
Extra Charges That Stack On
Possession is rarely the only count. Making a switch is treated the same as owning one under the NFA and carries the same up-to-ten-year penalty.3Office of the Law Revision Counsel. 26 U.S. Code 5861 – Prohibited Acts The ATF specifically names Glock switches and drop-in auto sears as illegal to manufacture without federal licensing.11Bureau of Alcohol, Tobacco, Firearms and Explosives. Privately Made Firearms Whether the device came off a factory line or out of a home 3D printer makes no difference to the classification.
Many switches are made overseas, particularly in China, and shipped in small international packages. Importing them violates the federal smuggling statute, which carries up to 20 years in prison and applies to anyone who receives, conceals, buys, sells, or helps transport the devices after they enter the country.12Office of the Law Revision Counsel. 18 U.S. Code 545 – Smuggling Goods Into the United States
State charges can run in parallel. Roughly 29 states have their own bans on auto sears and Glock switches, with maximum prison terms reaching 15 years in some. Because federal and state governments are separate sovereigns, a federal conviction does not block a state prosecution or the reverse. Most switch cases are prosecuted federally because the ATF leads the investigations, but state charges from a traffic stop or search can be followed by federal ones later.
What Follows the Prison Term
The sentence does not end at the prison gate. A ten-year-maximum federal firearms offense is a Class C felony,13Office of the Law Revision Counsel. 18 USC 3559 – Sentencing Classification of Offenses and a judge can impose up to three years of supervised release afterward. That means regular reporting to a probation officer, travel restrictions, mandatory drug testing, and the possibility of returning to prison for violations.14Office of the Law Revision Counsel. 18 U.S. Code 3583 – Inclusion of a Term of Supervised Release After Imprisonment
The felony conviction itself permanently bars possession of any firearm or ammunition under federal law. It disqualifies people from many professional licenses, government employment, and federal benefits. For non-citizens, a federal firearms felony is nearly always grounds for deportation. None of these consequences can be bargained away in a plea deal, and for many defendants they outweigh the prison term itself.