Acronyms can be clever and helpful. The military list of acronyms is quite extensive. Here are a few acronyms every gun owner and those interested self defense ought to know. By the way, I’m keeping the language clean since I’m not naturally inclined to use some words.
1. DRT—Dead Right There
Example: The homeowner shot the burglar in the face with her 12 gauge as he entered into her window. Obviously, he was DRT.
2. BAMF—Billet Aluminum Modern Firearm
Example: I recently heard about a gun manufacturer called Cobalt Kinetics that’s gaining some attention. Apparently BAMF means something other than what I thought it meant all along.
3. BFR—Big Flat Rock
Example: If you’re in a bind and you need an improvised tool or a hasty weapon, consider using a BFR.
4. DAO—Double Action Only
Example: The DAK is really a DAO. The “K” stands for Kellerman, the intern working at Sig Sauer at the time who developed that lame trigger, which has made Sig some big bucks.
5. BCG—Bolt Carrier Group
Example: When you’re building ARs, you need to search for a good BCG, made of quality material with a staked gas key.
6. EDC—Everyday Carry
Example: It’s good to have a knife, a gun and a light for EDC.
7. NFA—National Firearms Act
Example: I think the ATF needs to back off when it comes to NFAs.
8. SBR—Short Barreled Rifle
Example: SBRs are a good option for CQB/CQC (close-quarter battle/combat).
9. DGU—Defensive Gun Use
Example: Before I started writing for Guns.com, I had never heard of the acronym DGU.
Source Article from http://www.guns.com/2015/09/02/9-gun-guy-and-gal-acronyms-you-need-to-know/