SIGforum
300 BLK dedicated mags a necessity?

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/630601935/m/2510061874

January 04, 2021, 07:31 PM
SIGfourme
300 BLK dedicated mags a necessity?
I use the rubber bands marked 300 BO- red letters. Purchased thru Primary Arms. I also have a Red charging handle , so I know which upper is 300 BO. Absolutely no 300 BO and 556 on the active range at the same time. I’ve been searching for 300 BO mags with no luck.
January 04, 2021, 09:17 PM
sigfreund
quote:
Originally posted by SIGfourme:
Absolutely no 300 BO and 556 on the active range at the same time.


One of the wisest ideas.
January 05, 2021, 03:07 AM
mikey357
quote:
Originally posted by SIGfourme:
I use the rubber bands marked 300 BO- red letters. Purchased thru Primary Arms. I also have a Red charging handle , so I know which upper is 300 BO. Absolutely no 300 BO and 556 on the active range at the same time. I’ve been searching for 300 BO mags with no luck.


A coupla' days ago Larue Tactical had Lancer .300 BO Mags in stock...
January 05, 2021, 03:40 PM
Graniteguy
Brownells has the Magpul G3 30-round 300 Blackout Mags back in stock.

If you buy 10 ($150+) - there is a discount code for $15 off.
January 06, 2021, 02:37 PM
Mister Joshua
blue painters tape around all my 300blk mags, because I'm the schmuck dumb enough to be the better idiot and screw up.

I also have 3 dedicated 300blk PMags, and one of those super overbuilt HK 416 mags that is dedicated to 300 blackout.


"If somebody says there ought to be a law there probably ought not." - Penn Jillette
January 09, 2021, 03:41 AM
SIGfourme
Proven Outfitters has Magpul 300 BO mags!!
January 10, 2021, 09:11 AM
98XJRC
I would like to add that using shorter OAL rounds can create an issue when using the dedicated 300 mags. I’ve had issues with my 300 Lancers when fully loaded while using my 150gr and lighter loads (minus the Barnes). If the mag is loaded to 25 I don’t have an issue with the shorter rounds. Something to consider depending on what your shooting. Just my personal experience
January 11, 2021, 08:37 AM
shoevb
I've dedicated a couple of HK mags solely to 300 BO. They are built like a tank and I know immediately when I pick one up but after reading this thread I have ordered some of the elastic rubber band markers as another layer of safety.
January 11, 2021, 10:09 AM
F_L
quote:
Originally posted by 98XJRC:
I would like to add that using shorter OAL rounds can create an issue when using the dedicated 300 mags. I’ve had issues with my 300 Lancers when fully loaded while using my 150gr and lighter loads (minus the Barnes). If the mag is loaded to 25 I don’t have an issue with the shorter rounds. Something to consider depending on what your shooting. Just my personal experience


I have a couple of the Lancer 300 BO mags that are dedicated to sub sonic (215 gr). It does not reliably feed the smaller bullets. I think Lancer has a warning about it.
January 14, 2021, 05:56 PM
sigfreund
Magpul just announced 20-round 300 Blackout magazines here. Another possible way for easy identification.



► 6.4/93.6

“Wise men talk because they have something to say; fools, because they have to say something.”
— Plato
January 17, 2021, 05:24 PM
Oat_Action_Man
quote:
Originally posted by Graniteguy:
Brownells has the Magpul G3 30-round 300 Blackout Mags back in stock.

If you buy 10 ($150+) - there is a discount code for $15 off.


Thanks for the heads up on that. Just ordered one of those packs.


----------------------------

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