300 Blackout fired in 5.56 rifle KABOOM

[RPM509]

Had not a single clue that the 300 Blkout would close up in a 5.56 upper like that.
Just for convenience, all my PMAGs are sorted - Black = 300 Blackout, FDE = 5.56

[80hp]

I was at the NRA convention last weekend.
I talked to the folks at MAGPUL and suggested they produce a dedicated 300 Blk magazine with markings molded in to make it easy to spot.
They said they were considering a magazine optimized for 300 Blackout, but they were too busy now filling orders for AR magazines.
M.

[scottryan]

My 556 mags are aluminum with magpul followers and floorplates. My 300 mags are pmags

This is what I do.

[Eljay]

My 556 mags are aluminum with magpul followers and floorplates. My 300 mags are pmags

This is what I do.

Me too.

[skhowell]

Belt & suspenders...

Spritz some paint through a home brew stencil on both sides & stick a P-Touch label on the base.



Nick

[arodpdt117]

my method is Black pmags = 300 BLK, Tan/FDE pmags = 223

[20X11]

my method is Black pmags = 300 BLK, Tan/FDE pmags = 223

Mine is just the opposite, but same idea. Ne'er the twain shall mix.

[Ledslnger]

I only have .223 in bolt actions. ARs are for cooler IMO calibers. Don't have to worry about this happening.

[scpossum]

Yep. 300 will chamber in 5.56 and 25/223. All my guns are color coded. Mags and rifle match up with same colors and they are NEVER on the bench or out of their case at the same time. I shoot with 4 children and the risks are too great to break this rule.

[mostholycerebus]

This is why I consider $15 on a dust cover marked "300 BLACKOUT" to be money well spent. I also have done only my 300 blackout in magpul OD, so rocking the color coding thing too.