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SIGfourme
Member
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posted January 04, 2021 07:31 PMHide Post
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.
 
Posts: 2416 | Location: Southeast CT | Registered: January 18, 2009Reply With QuoteReport This Post
sigfreund
Freethinker
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posted January 04, 2021 09:17 PMHide Post
quote:
Originally posted by SIGfourme:
Absolutely no 300 BO and 556 on the active range at the same time.


One of the wisest ideas.
 
Posts: 48343 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
mikey357
Member
posted January 05, 2021 03:07 AMHide Post
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...
 
Posts: 652 | Location: Griffin, GA, USA | Registered: November 03, 2004Reply With QuoteReport This Post
Graniteguy
Member
posted January 05, 2021 03:40 PMHide Post
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.
 
Posts: 5006 | Location: NH | Registered: April 20, 2010Reply With QuoteReport This Post
Mister Joshua
I don't deserve
this CUT
posted January 06, 2021 02:37 PMHide Post
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
 
Posts: 5246 | Location: Clearwater, FL | Registered: January 29, 2005Reply With QuoteReport This Post
SIGfourme
Member
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posted January 09, 2021 03:41 AMHide Post
Proven Outfitters has Magpul 300 BO mags!!
 
Posts: 2416 | Location: Southeast CT | Registered: January 18, 2009Reply With QuoteReport This Post
98XJRC
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posted January 10, 2021 09:11 AMHide Post
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
 
Posts: 786 | Location: PA  | Registered: December 05, 2010Reply With QuoteReport This Post
shoevb
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posted January 11, 2021 08:37 AMHide Post
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.
 
Posts: 1253 | Location: Hampton Roads | Registered: February 13, 2009Reply With QuoteReport This Post
F_L
Member
posted January 11, 2021 10:09 AMHide Post
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.
 
Posts: 303 | Location: Canyon Lake, TX | Registered: December 22, 2008Reply With QuoteReport This Post
sigfreund
Freethinker
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posted January 14, 2021 05:56 PMHide Post
Magpul just announced 20-round 300 Blackout magazines here. Another possible way for easy identification.



► 6.0/94.0

To operate serious weapons in a serious manner.
 
Posts: 48343 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
Oat_Action_Man
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posted January 17, 2021 05:24 PMHide Post
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.


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

Chuck Norris put the laughter in "manslaughter"

Educating the youth of America, one declension at a time.
 
Posts: 19837 | Location: SE PA | Registered: January 12, 2001Reply With QuoteReport This Post
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