Magazine mod?? Feed issue

[Gpz1100]

i figure it's a magazine modification i need to make...

will chamber odd number rounds(left side)but not even number(right side)

cheap(national)20 rd on sale @ midway

ok guru's, what do i need to do??


EDIT!!

i need to add, it's not a short stroke issue. i can pull the bolt back on an even number round and the bolt slides right over the round. take that round out and pull the bolt back and it will pick up the odd number rounds.

[pug]

First you could make up a few dummy rounds for testing purposes so you can drop the bolt without worrying about it. When you say the bolt slides right over with an even number of rounds you mean when the bolt is closing? When the bolt is unlocked the bottom two lugs extend a good ways into the magazine. On a proper working system one lug will be in complete contact with the rim of a round. It is probably the magazine and it may be a combination problem. Pull the bolt back and lock it. Put the magazine in until it catches and see if the magazine has a lot of up and down movement even though it is locked in. Hold upwards on the magazine if there is up/down play and see if it picks up a round out of both stacks. Look closely at the feed lips on the mag and see if they appear to be formed even on both sides. Look at the bolt lug closely as it tries to strip a round off. Like said the part of the lug that sticks off of the bolt should be covered completely by the head of the cartridge equally for each lug but one at a time. Not going to post a pic but if you need it hollar :smile:

[Ron458]

Pug is right. Sounds like a sloppy mag. The mag catch is on the left keeping the mag high on that side. You will need to bend the feed lips up a little so the round rides a little higher. Try these a 44mag.com 20rd Straight Body NHMTG They work great & arent too long for bench work for only $13 Ron

[Gpz1100]

my first ar is a 308 dpms. got it about a month ago. you have to really press to latch a mag. the lower i'm using is also a dpms. you're right, it takes no effort to insert mag and it's a little loose. i tried bending the tabs up like you suggest but it didn't help. i'll try some others.

[steezo757]

hmm....I've used both D&H and C-Product twenty rounders with no mag modifications needed.

[Gpz1100]

Ordered a couple of NHMTG 20 rd straight body from 44 mag. sending the other 2 back to Midway.
I'll just hand feed it till then. Need to get the barrel threaded anyway.

[kdiver58]

Did the new magazines fix the problem ??

[Gpz1100]

The NHMTG mags didn't work either. Would start to feed then jam. Ordered some poly mags from Magpul. Work great. No feed issues at all

[kdiver58]

I just got a new 5.56 DPMS AR-15 . I used the new mags with my whisper and they worked fine. I guess it's all in finding the right magazine for your whisper. I shot the M1S upper on 2 lowers and everything worked fine..

[JFettig]

The NHMTG mags didn't work either. Would start to feed then jam. Ordered some poly mags from Magpul. Work great. No feed issues at all


This is what I was gonna suggest, I use the 20rnd PMAGs in mine. I haven't got many rounds through it yet though.

Jon

[Pitt300]

I love PMags!
Where did you get your 20 rounders?
I can only find 30s.

[JFettig]

http://www.aimsurplus.com/acatalog/AR_Magpul_Polymer_20rd_.223_AR15_M16_PMAG_Magazine s.html

very cheap and almost free shipping!

Jon

[Gpz1100]

2nd that. it's where i got mine

[Pitt300]

THANKS!!!!!!!!!!!!!!
Hell of a deal!
Just ordered some.

[Utah Shotgunner]

Does the upper/barrel have M4 feedramps?

A friend had a .223 AR that did the same thing and worked fine with my Pmags. Further looking found that the ramp in the upper was to 'deep' leaving a lip that the nose of the bullet was catching on. Apparently the Pmags presented the nose of the bullet a little higher but the problem was not with the mags.

A quick trip back to the manufacturer for repair now has it feeding reliably from all types of magazines.

[kdiver58]

My 300 likes new tight mags. It feeds every time from a new mag but older more worn mags feed from one side but not the other. Go figure ..
Just get Magpul PMAG's they ROCK .. Feed everything .. sub sonic, super sonic , COR-Bon and my reloads. Everything from 150 grain to 220 grain .. it handled all of my 300 fireball loads.