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AR15.COM
3/13/2025 5:26:11 PM EDT
I can’t remember if this is typical but I have a new production colt carbine, and a loaded steel mag will not seat with the closed bolt.  I was pretty forceful with it. Is this typical or a mag issue.
3/13/2025 5:48:47 PM EDT
[Last Edit: Bishop3][Edited] [#1]
Have you tried another magazine type, polymer or aluminum? I can't recall having an issue with any Colt I own. I always tap the bottom of mag with the heel of my palm after inserting a loaded magazine and this action ensures it locks-in every time.

Maybe down load your steel mag.
USMC 85-'93 Amphibious YAT-YAS
3/13/2025 5:58:01 PM EDT
[#2]
Quote History
Originally Posted By Bishop3:
Have you tried another magazine type, polymer or aluminum? I can't recall having an issue with any Colt I own. I always tap the bottom of mag with the heel of my palm after inserting a loaded magazine and this action ensures it locks-in every time.

Maybe down load your steel mag.
View Quote

Download is a good idea.  Also, does it do it with an empty mag too?
OK, see you later, Redcoat…
3/13/2025 8:34:15 PM EDT
[#3]
I've yet to run into any brand of mag loaded with 30rds fail to seat in any brand of AR-15. Maybe I've been lucky over the last 45 years. But, I have accidentally loaded 31 and had a couple fail. There were some that you could get that 31st round in there. Count your rounds and see to be sure.

I I have read of it happening with 30, and one friend had a mag that he had to download to 29 for a while until the spring set. But that was a 1980s Colt mag.
3/13/2025 8:56:04 PM EDT
[#4]
Normal for a AR-15, download mag by 2 rounds.
3/14/2025 7:24:38 AM EDT
[#5]
Thanks,. Downloaded the mag by two in it works fine.

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