M&P15 Sport, supplied magazine not staying in..

[MedWheeler]

BSA1, I figure that's likely (shooting the gun may loosen things up.)

Just not ready to try that in my living room.

That's also why I have not tried inserting the mag on an open bolt, then hitting the bolt release. I don't handle chambered-round guns at home before I've actually gotten well-familiar with them at the range.

 

[MedWheeler]

Sounds like this is normal, guys, at least for a new rifle/magazine. Thanks.

 

[moxie]

Agree with unlimited and mrclean.

Although loading a full mag with the bolt to the rear then hitting the mag release is the preferred way per post #19, there is one instance when it becomes necessary to load the mag against a closed bolt. That's with a "tactical reload." That's when there is a break in the fight and you have a chance to dump your mag that's short X number of rounds and replace it with a full mag (if you have one!), giving you more firepower. So it is important to be able to load a full mag against a closed bolt.

Here's one explanation:
http://www.liveleak.com/view?i=333_1327369545

Here it is again, plus another way:

https://search.yahoo.com/search;_yl...load+video&fr2=sa-gp-search&fr=yfp-t-901&fp=1

Notice no slapping needed!