AR-15 mag question

[akirpal78]

my magazine that came with my rifle it's a magpul 10 round magazine. if I load ten rounds it does not clip on my rifle. but when I put 9 rounds it's clips on fine. I got another same magazine, and loaded with ten rounds and it clips on fine. I put it side by side and everything looks the same. any ideas what the issue is?

[SNCaliber]

Some Magpul 10 round blocked mags will not fit with a bolt closed with ten rounds, depends on the way the company did the mag block

[Merc1138]

It's because the piece that's blocking it to 10 rounds is slightly longer. "normal" large capacity mags will have room to push the top round down. Some people blocking mags err on the side of caution instead of risking the ability to force an 11th round in.

It's normal.

[damndave]

Some Magpul 10 round blocked mags will not fit with a bolt closed with ten rounds, depends on the way the company did the mag block

What he said. Some will work, some will not. All depends on who made them.

[Jazeronthelaser]

Same here. When I have my 10 round (9 acutally) magpul magazine in it will not seat w/ 10 rounds. When I load it w/ 9 rounds the magazine will seat but gives me problems when the bolt is locked back. It disables my B.A.D. lever and I'm forced to manually charge the weapon to chamber a round. Not reason enough to toss them but kind of a pain. I believe this is normal with these re-builds.

[Merc1138]

Same here. When I have my 10 round (9 acutally) magpul magazine in it will not seat w/ 10 rounds. When I load it w/ 9 rounds the magazine will seat but gives me problems when the bolt is locked back. It disables my B.A.D. lever and I'm forced to manually charge the weapon to chamber a round. Not reason enough to toss them but kind of a pain. I believe this is normal with these re-builds.

Wait... what? How does 9 rounds in the mag disable a bolt release, but charging it normally works? The CH can only pull rearward on the BCG, not forward...

[Jazeronthelaser]

Wait... what? How does 9 rounds in the mag disable a bolt release, but charging it normally works? The CH can only pull rearward on the BCG, not forward...

While having the bolt locked back with the mag inserted I cannot release my bolt catch (b.a.d. lever). I have to manually pull back on the charging handle and let the bolt fly forward for it to chamber.

[Jazeronthelaser]

I have no idea why. Maybe you can tell me?

[Merc1138]

Odd. Are you barely able to get the 9th round in? The only way the situation you described would make any sense, is if the 9th round barely fit and the feed lips prevented it from moving(or maybe you aren't using a standard spring/buffer?)

[Jazeronthelaser]

Odd. Are you barely able to get the 9th round in? The only way the situation you described would make any sense, is if the 9th round barely fit and the feed lips prevented it from moving(or maybe you aren't using a standard spring/buffer?)

That's kind of what I figured it was. On the 10/20 magpul rebuild it is impossible for me to load the mag with ten rounds and I barely fit 9, I also notice with 9 rounds loaded there is very little spring play. I figured that was probaly it and the only thing I noticed. I am using the buffer and spring that my bushmaster xt-15 patrolman came with. I've had no other issues than with these magazines.

[SURVIVOR619]

I have 10 round magpul stubbies (20 rounders cut down to 10 round length) from Midwest PX that fit all 10 and the BHO works. They cost a bit more than some of the 10/20 or 10/30s but are nice if you don't want the extra and unused length.


Sent from my iPhone using Tapatalk🔫

[Jazeronthelaser]

Midwest px. Gonna have to check that out. Thanks survivor619.

[tradecraft]

my magazine that came with my rifle it's a magpul 10 round magazine. if I load ten rounds it does not clip on my rifle. but when I put 9 rounds it's clips on fine. I got another same magazine, and loaded with ten rounds and it clips on fine. I put it side by side and everything looks the same. any ideas what the issue is?

Load on an open bolt and this won't be an issue.

[SURVIVOR619]

Midwest px. Gonna have to check that out. Thanks survivor619.

Yeah man!
Here's a reference of one in its own and seated in my lower...




Sent from my iPhone using Tapatalk🔫

[Jazeronthelaser]

Yeah man!
Here's a reference of one in its own and seated in my lower...




Sent from my iPhone using Tapatalk��

Thanks again, and NICE pics!