The NY SAFE Act of 2013 redefined "assault weapon" using a one-feature test that is significantly stricter than the previous two-feature test and stricter than the federal assault weapon definitions that expired in 2004[1]. If you want to own an AR-15-platform rifle or similar semiautomatic firearm in New York, you must either build it to be compliant or use a fixed-magazine configuration. This guide explains both approaches.
Understanding the One-Feature Test
Under PL 265.00(22), a semiautomatic rifle is classified as an "assault weapon" if it has the ability to accept a detachable magazine AND possesses at least one of the following features[2]:
- Folding or telescoping stock
- Pistol grip that protrudes conspicuously beneath the action of the weapon
- Thumbhole stock
- Second handgrip or a protruding grip that can be held by the non-trigger hand
- Bayonet mount
- Flash suppressor, muzzle brake, muzzle compensator, or threaded barrel designed to accommodate a flash suppressor, muzzle brake, or muzzle compensator
- Grenade launcher
The critical word is "AND." Both conditions must be present: a detachable magazine capability plus at least one listed feature. Remove either element -- the detachable magazine or the prohibited feature -- and the rifle does not meet the statutory definition of an assault weapon. This creates two distinct legal paths for building a compliant rifle.
Option 1: The Featureless Build
A featureless build removes all prohibited features while retaining the ability to accept a detachable magazine. This is the most common compliance strategy[3].
Required modifications:
- Fixed stock -- Use a stock that does not fold or telescope. A standard A2-style fixed stock or a pinned adjustable stock (permanently locked in one position) is acceptable.
- No pistol grip -- Replace the standard AR pistol grip with a featureless grip (such as a Thordsen FRS-15, Spur grip, or similar product that prevents the hand from wrapping around a conspicuous grip below the action).
- No thumbhole stock -- Avoid any stock configuration that allows the thumb to pass through the stock.
- No vertical foregrip -- Do not attach any second handgrip or protruding grip for the non-trigger hand. Angled foregrips that do not protrude conspicuously may be acceptable, but this is an area where legal interpretation varies.
- No bayonet mount -- Remove or avoid any bayonet lug.
- No flash suppressor, muzzle brake, or threaded barrel -- The muzzle must be either bare or have a permanently attached (pinned and welded) non-functional muzzle device. A thread protector permanently affixed over the threads is one approach.
Option 2: The Fixed-Magazine Build
A fixed-magazine build permanently affixes the magazine to the rifle, eliminating the "ability to accept a detachable magazine" element of the definition. With a fixed magazine, you can legally retain features like a pistol grip or adjustable stock because the rifle no longer meets both prongs of the test.
Key requirements:
- The magazine must be permanently fixed and not removable without disassembly of the firearm action
- Magazine capacity must not exceed 10 rounds[4]
- Various products exist to convert standard AR-pattern rifles to fixed-magazine configurations (such as the CompMag or similar devices)
Semiautomatic Shotgun Rules
Semiautomatic shotguns have a different (and in some ways stricter) definition. A semiautomatic shotgun is an assault weapon if it has any one of these features, regardless of magazine type[5]:
- Folding or telescoping stock
- Thumbhole stock
- Second handgrip or protruding grip for the non-trigger hand
- Fixed magazine capacity exceeding seven rounds
- Ability to accept a detachable magazine
Additional Requirements
- Semiautomatic rifle license: Since September 4, 2022, any purchase or new acquisition of a semiautomatic rifle requires a license, and you must be 21 or older[6].
- Magazine limit: All magazines are limited to 10 rounds. Possession of a magazine with a capacity exceeding 10 rounds is a Class D felony under PL 265.02(8)[7].
- No ghost guns: All firearms must have a serial number. Building a firearm from an unserialized frame or receiver is illegal under the Jose Webster Untraceable Firearms Act[8].
- No rapid-fire devices: Bump stocks, binary triggers, trigger cranks, and similar devices are prohibited under PL 265.01-c[9].
Choosing the Right Approach
The featureless build is the more popular option because it retains the convenience of a detachable magazine for reloading and cleaning. The fixed-magazine build appeals to shooters who prefer standard ergonomic features like a pistol grip and adjustable stock. Both approaches are legally valid, but each involves trade-offs in usability. Consider which features matter most to you before starting your build or purchase.
Critical Warnings
- Possession of an unregistered assault weapon is a Class D felony carrying 2 to 7 years in prison
- If you are unsure whether your build is compliant, consult a New York firearms attorney before assembling or purchasing
- Compliance products and configurations change as manufacturers develop new solutions -- verify that any product you buy is specifically marketed as New York SAFE Act compliant
- A rifle that was compliant when you purchased it can become non-compliant if you add a prohibited feature later -- always evaluate the firearm as a complete system