Webster, MA — A 24-year-old Webster man was charged in the District of Massachusetts last week for dealing firearms without a license following an undercover operation by the ATF last summer.
The criminal complaint filed in the District of Massachusetts following a Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) investigation alleges 24-year-old Anthony “AJ” Pietrowski of Webster, MA, sent photos of privately manufactured firearms to an undercover ATF agent before meeting on four occasions in the parking lot of a Webster business to sell pistols, 3D-printed frames, and a Machinegun Conversion Device (MCD, or “button”) which is classified as a “machinegun” and a “firearm” under the National Firearms Act (NFA).
The complaint explained that in the summer of 2025, the ATF determined that Pietrowski was offering firearms for sale without a license to manufacture or sell these firearms. An undercover ATF agent made contact with Pietrowski via text and began discussing the purchase of firearms, where Pietrowski provided photos of the firearms he had for sale.
On August 7, 2025, following one previously failed attempt to meet and conduct a transaction, a meeting was organized between Pietrowski and the undercover agent to meet in the parking lot of 128 E Main St, Webster—Papa Gino’s—to conduct the sale of a Glock 19-like pistol and ammunition for $1,000. Agents were able to positively ID Pietrowski based on distinct tattoos on his body and neck, as well as a comparison to known images. It was noted he arrived in a BMW with Massachusetts plates. The agent paid Pietrowski $1,000 in exchange for a privately manufactured Glock-style firearm and eight rounds of ammunition.
During the exchange, the agent and Pietrowski spoke about future firearm sales and 3D printing. Pietrowski explained the guns were custom builds where he 3D-printed the frames out of strong PLA+ material before assembling the rest of the parts, which he’d purchase on eBay and assemble, stating “it’s easy bro, it’s literally a Lego kit for an adult.” The agent explained he didn’t have a printer, at which point Pietrowski offered to sell him just the printed frames in order for him to assemble his own firearms. Once the transaction was over, the undercover agent met with other agents at a prearranged location and transferred the firearm to their possession. The gun was inspected and later fired, and it was determined to meet the federal definition of a firearm.
During the second transaction on August 19, 2025, an undercover agent again met Pietrowski in the parking lot of 148 E. Main St. There, the agent purchased three 3D-printed pistol frames and a slide/barrel for $720. Pietrowski arrived in a Lincoln bearing Connecticut registration.
During the third transaction on August 28, 2025, the agent met Pietrowski at the same parking lot. Pietrowski arrived driving a Nissan pickup truck with Connecticut registration. The agent paid $1,150 in exchange for a firearm and an MCD. During the meeting, the two discussed the MCD, indicating both parties were aware of the device’s intended purpose.
During the fourth transaction on October 9, 2025, Pietrowski again arrived at the location, driving the BMW with Massachusetts registration. The undercover agent paid $350 in exchange for six 3D-printed, privately made pistol frames.
While the criminal complaint lists Pietrowski as having a Webster residence, during two of the four transactions, vehicles with Connecticut plates were used. Quiet Corner Alerts was able to locate a previous connection to a Putnam, CT, residence based on a 2021 arrest.
Anthony “AJ” Pietrowski is charged with one count of violating 18 U.S.C. § 922(a)(1)(A): Dealing in Firearms Without a License. The charge of unlicensed dealing in firearms provides for a sentence of up to five years in prison, three years of supervised release, and a fine of $250,000. Pietrowski was released on a $10,000 bond with the conditions of not possessing firearms/ammunition, 3D printers, or communicating with anyone regarding firearms or ammunition.
Agencies involved in the investigation included the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), United States Postal Inspection Service, Warwick (RI) Police Department, Webster Police Department, Massachusetts State Police, and the Worcester Police Department. The case is part of the Homeland Security Task Force (HSTF).
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