Murfpcola
Master
Quick history here. I bought a Bushmaster carbine about 15 years ago while the Brady Bill was in effect. All I have ever had was a rag-tag collection of 10,20 and thirty round mags that I picked up used along the way at gun shows and flea markets. I put between 500-800 rounds through the Bushmaster with out any feed problems that I remember. I have not shot much in the last several years and the carbine just sits in the safe.
A couple weeks ago I traded a gun I had for a PSA mid length AR 15 with a key mod rail that I am going to use to hunt hogs at night. I put 20 rounds through the PSA when I got it with one of my surplus metal mags. No problem what so ever.
I decided to pick up some 30 round mags while they are cheap and easy to find. I asked a couple friends and they said the P Mags seem to be the crowd favorite so I decided on them. Tuesday I pick up 9 brand new mags in the plastic from a local source. Yesterday I put 20 rounds of steel cased wolf ammo in the first mag to sight in my red dot. I planned on using the wolf to get it close then switch to the brass case Monarch soft point that I plan on hunting with. I was going to shot twice, adjust, shoot twice, adjust and so on. I shoot once then click. No round in the chamber, pull back charging handle and let it rip. Shoot once then click. No round in the chamber. This goes on for 15 rounds at which point I drop the mag and pet some Remington on top of the wolf just to see what happens. It happens again then I get three shots in a row then another FTF. Recharge the rifle then two shots in a row. Then another FTF.
At this point I load my metal mag with the monarch soft point and I shoot six rounds without a hitch. Yesterday evening I put 4 rounds of Remington in the PMag and run it through my friends Adams Arms AR pistol without a problem. The 9 magazines that I got appear to be made sept of 2013 if that matters. Being this is the first polymer mag I have used after having no problem with my metal mags is kind of disheartening. Is this a known problem? What should I look for? I did not open any of the other mags. Is there a break in period? This morning I took a stick and pushed the follower down in the PMag several times and it seems smooth as can be and pretty strong? I did some searching on the net about p mag problems and did not see one like mine. The bolt stayed open after the last shell. Thanks in advance for any input, Murphy.
EDIT EDIT EDIT I was showing this AR to Nate back in October and he informed me that it was not a mid-length but was actually rifle length therefore the dwell time is nearly non existent. This is why it would not cycle low powered steel ammo. It is a very soft shooter though.
A couple weeks ago I traded a gun I had for a PSA mid length AR 15 with a key mod rail that I am going to use to hunt hogs at night. I put 20 rounds through the PSA when I got it with one of my surplus metal mags. No problem what so ever.
I decided to pick up some 30 round mags while they are cheap and easy to find. I asked a couple friends and they said the P Mags seem to be the crowd favorite so I decided on them. Tuesday I pick up 9 brand new mags in the plastic from a local source. Yesterday I put 20 rounds of steel cased wolf ammo in the first mag to sight in my red dot. I planned on using the wolf to get it close then switch to the brass case Monarch soft point that I plan on hunting with. I was going to shot twice, adjust, shoot twice, adjust and so on. I shoot once then click. No round in the chamber, pull back charging handle and let it rip. Shoot once then click. No round in the chamber. This goes on for 15 rounds at which point I drop the mag and pet some Remington on top of the wolf just to see what happens. It happens again then I get three shots in a row then another FTF. Recharge the rifle then two shots in a row. Then another FTF.
At this point I load my metal mag with the monarch soft point and I shoot six rounds without a hitch. Yesterday evening I put 4 rounds of Remington in the PMag and run it through my friends Adams Arms AR pistol without a problem. The 9 magazines that I got appear to be made sept of 2013 if that matters. Being this is the first polymer mag I have used after having no problem with my metal mags is kind of disheartening. Is this a known problem? What should I look for? I did not open any of the other mags. Is there a break in period? This morning I took a stick and pushed the follower down in the PMag several times and it seems smooth as can be and pretty strong? I did some searching on the net about p mag problems and did not see one like mine. The bolt stayed open after the last shell. Thanks in advance for any input, Murphy.
EDIT EDIT EDIT I was showing this AR to Nate back in October and he informed me that it was not a mid-length but was actually rifle length therefore the dwell time is nearly non existent. This is why it would not cycle low powered steel ammo. It is a very soft shooter though.
Last edited: