An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Home : Articles
Would you stake your life, right now, on the condition of your equipment?
NEWS | Aug. 10, 2023

M240 Machine Gun: Need a BFA Discriminator?

BLUF: Properly use the M240 machine gun discriminator

This article from May 22 was updated 8/10/2023

The discriminator will be added to the M240 machine gun additional authorization list (AAL) according to TACOM.

The discriminator can be used when firing your M240 series machine gun with a blank firing attachment (BFA).
  • When using the M21 BFA, the chamber and discriminator, as an assembly, are mandatory.
  • When using the M24 or M26, the discriminator is optional. Use NSN 1005-01-700-0177 to get the individual discriminator.
Model Use BFA
M240 M1 Abrams fleet coax and loaders M21
M240 LAV (USMC) coax M21
M240C M2 Bradley fleet coax M21
M240B w/long barrel M24
M240L w/short barrel M26
M240H Aircraft mounted w/long barrel M24
Want to get better search results faster? 
Click the link below to access our "how to" guide
After entering a keyword, you must hit or click the Search bar/box below for the function to work.
Simply hitting Return won't yield results.
Note about links to archive articles

If you come across a link to a pre-2014 PS Magazine issue or article that uses LOGSA in the web address (URL), use this link instead:
For issues/articles from 2014 and after, click on the Archive/Index tab in the top menu of this website.

BE ADVISED: With the migration to Army365, emails in older articles may still reflect an address. To update, change the domain to