Silencerco-Osprey-Glock19One of the most common questions we get from customers looking into the showcase on your left in the store is “Are silencers legal?”
Silencers and machine guns, among other items, are regulated federally under the National Firearms Act, enacted on June 26, 1934. The process of purchase is more involved than current state-level regulated firearms, and the wait for processing paperwork can run 6 to 9 months.


Duffy’s carries silencers from a number of different companies. We have done our best to select well built, reliable manufacturers who have proven themselves with customer service.

SBR (Short Barreled Rifle) SBS (Short Barreled Shotgun)

Any rifle with a barrel under 16″ is regulated under the NFA.
Any shotgun with a barrel under 18″ is regulated under the NFA.
Our gunsmith can assist you with professional work to turn your firearm into an SBR or SBS, and our NFA specialist can assist you with the paperwork process.


We deal in a range of sub-machine guns and machine guns. Any machine gun registered with the ATF prior to May 19, 1986 is transferable to civilians.

AOW (Any Other Weapon)

This last category is a catch-all for guns that don’t fit into one of the other specific categories.


Because of the many variables involved in NFA transfers, the fees will be assessed per transaction.

Recent Posts

Wednesday Q&A: After NICS Delay, what day?

When you buy a firearm from a gun store, a NICS (National Instant Criminal Background Check System) check is done. Checks are usually determined within minutes of initiation, but occasionally a check might result in a delay while examiners spend more time researching the check. A proceed will probably come after a few days, but if it doesn’t, the law allows for it to be picked up after three business days. But if a customer buys a gun on a Friday, that might not be until Thursday of the following week.

What are NICS business days? A business day is any 24-hour period beginning at 12:01 a.m. the day after the check was initiated, in which state offices are open. A business day does not include Saturday, Sunday or state Holidays. The table below advises when the firearm can be transferred (since we’re closed Sundays and Mondays, we leave that off the chart):

Tuesday -> Saturday
Wednesday -> Tuesday
Thursday -> Wednesday
Friday -> Thursday
Saturday -> Thursday

If you get a delay, and we get a determination before the standard day of pickup, we’ll give you a call to come take it home!

  1. Q&A Wednesday: How does an individual appeal a NICS denial decision? Leave a reply
  2. Q&A Wednesday: May I lawfully ship a firearm directly to an out-of-State licensee… Leave a reply
  3. Q&A Wednesday: May I lawfully transfer a firearm to a friend who resides in a different State? Leave a reply