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  1. #16
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    My guess, and that's all it is, is that PMags probably have varied lot to lot more than mag to mag. Eric's numbers are pretty close tolerance wise.


    TS

  2. #17
    Boogieman Guest
    I will see how things work out with them. Per the Magpul webpage, this is a known issue. See below:

    PMAG Replacement Body

    It has come to the attention of Magpul Industries Corp that a number of users have experienced feeding problems with their PMAGs™ due to unusually tight magazine bodies. The primary symptom is sluggish follower response, or snagging when loaded with more than 20 rounds. These issues are a result of dimensional changes occurring after the PMAG™ left the Magpul factory, and only affect the PMAG™ body. Other PMAG™ components such as the follower, lock plate, floor plate, and impact cover are unaffected.

    Improvements in the manufacturing process have resolved this issue on all PMAGs™ dated 7/07 and later. Although this issue affects only a very limited number of PMAGs™, Magpul will replace all PMAGs™ dated 6/07 and earlier. To determine your PMAG’s™ date of manufacture, check the round date code on the upper half of the left side of the PMAG™ (see image).



    The arrow points to the month of manufacture, and the year is in the center. If you are unsure of your PMAG’s™ performance, we encourage its replacement.

    This PMAG™ exchange is at no cost to you. Please complete this order form detailing the magazines you will be returning. A valid credit card number is required for this exchange, but will not be immediately charged; we simply request you return your 6/07 and earlier PMAG™ bodies in a reasonable time frame. Should you decide to keep your 6/07 and earlier PMAG™ bodies, your credit card will be charged $5 per replacement body.

    In order to provide the most efficient service possible, Magpul is not able to swap colors or styles (window/non-window). The new PMAG™ bodies you receive will be the same color and style as your original PMAGs™. A pre-paid return shipping label will be included with the new magazine bodies. Disassemble your 6/07 and earlier PMAGs™ and return only the PMAG™ bodies using the provided shipping box.

  3. #18
    BRD Jerm Guest
    there is also some issue's with them not dropping free,with mags made in 7/7 and 8/7.

    but a few swipes with some sand paper,or just using them for a short time,seems to fix it.

    a little extra material in a spot or two.

    If you have a PMAG™ with 7/07 or 8/07 mfg date, there is a tuning procedure you can perform that may help improve drop free performance. On these magazines, additional material is present on the front face of the Feed Tower Front Wall (see below). This added material can interfere with tighter magazine wells (front-to-back) causing some drag. Be aware that Magpul cannot guarantee the results of any modification and anyone performing said modifications do so at their own risk.
    PMAG™ DROP-FREE TUNING PROCEDURE



    STEP 1 - BREAK IN

    Break in magazine by inserting it into the magazine well numerous times (20-30 or more). Do not continue further once magazine starts to drop free. If the magazine does not begin to drop free readily, look for wear spots to determine any areas of interference. If the front or back of the magazine Feed Tower shows wear then proceed to STEP 2. If wear is present on the small Front Transition Angle between the base of the Feed Tower Front Wall and the Top Rib proceed to STEP 3.



    STEP 2 - FLATTEN FRONT FEED TOWER WALL

    Using a flat file, lightly remove material from the front face of the Feed Tower Front Wall. Concentrate on high spots underneath Feed Relief Cut and around and underneath the Feed Tower Molding Gate. Be careful not to remove too much material! The maximum amount that should be removed is enough to make the front face flat (planar). Test magazine often for drop-free ejection. Do not continue further once magazine starts to drop free.



    STEP 3 - ADJUST FRONT TRANSITION ANGLE

    Using a round file, lightly remove material from the small Front Transition Angle between the base of the Feed Tower Front Wall and the Top Rib. This area is located approximately 1/3 of the way down on the FRONT of the magazine. Concentrate on removing material in the downward direction (as the magazine normally sits in the weapon). WARNING: DO NOT dip underneath the surface of the Feed Tower Front Wall as this can create a very thin area in the magazine and structurally weaken it. Test magazine often for drop-free ejection. If necessary, repeat STEP 1 – Break-in and look for interference/wear areas.

    for reference...

    PMAG™ MAGAZINE BODY FEATURES



    Feed Tower – The top portion of the magazine that enters into the AR-15/M16 magazine well. It consists of approximately the top third of the magazine. The exterior walls of this section are generally flat and straight in order to slide easily into the rifle.



    Feed Tower Front Wall – This flat, vertical wall is located on the front of the magazine and is the front section of the Feed Tower. It is rounded on the sides where there are two Locking Tabs toward the top and two Guide Tabs toward the bottom.



    Feed Relief Cut – This shallow “U” shaped cut is located at the top of the Feed Tower Front Wall. It is in front of and below the bullet tips when the magazine is loaded. It allows clearance for the rounds to feed into the rifle Feed Ramps.



    Feed Tower Molding Gate – This generally rectangular patch is located between the Guide Tabs. This area has some built-up material on 7/07 and 8/07 magazines.



    Front Transition Angle – This feature is located approximately a third of the way down on the front of the magazine. It joins the base of the Feed Tower Front Wall with the front of the Top Rib. When viewed from the side it points approximately 60 degrees down and a 1/8” long.



    Guide Tabs – Located below the Locking Tabs on the Feed Tower Front Wall. The Guide Tabs help stabilize the magazine in the rifle and help seal off the magazine well from debris intrusion.



    Locking Tabs – Located on the top-sides of the Feed Tower Front Wall, these tabs engage the front of the Impact Cover (i.e. Impact Cover Locking Yoke).



    Magazine Catch Groove – Located on the left side of the feed tower (i.e. Feed Tower Left Wall), the Magazine Catch Groove locks into the rifle Magazine Catch. This is a critical interface and should NEVER be modified. The lower protrusion (i.e. Magazine Catch Stop) prevents over-insertion of the magazine into the rifle. The Manufacturing Date Stamp is located directly below this area.



    Manufacturing Date Stamp – This circular dial indicates the date of manufacture. It is located directly below the Magazine Catch Groove and Stop. The center protrusion contains an arrow with two numbers that indicate the year of manufacture (i.e. "07" for 2007). The arrow should point to one of the 12 numbers indicating the month of manufacture (i.e. “12” for December).



    Top Rib – This feature is directly below the Feed Tower and separates it from the rest of the magazine. It is angled up at approximately 10 degrees when the magazine is viewed from the side. When inserted into the rifle, the Top Rib is directly below the rifle Magazine Well and wraps around the circumference of the Magazine Body.

  4. #19
    Boogieman Guest
    I just want to bring up what Stickman brought up earlier....

    Quote Originally Posted by Stickman View Post
    If you aren't pulling/ ripping that magazine out of the magwell, you are training wrong, but I understand Johns point.
    You should NEVER expect and solely rely on gravity removing your magazine for you. Train by stripping the magazine out and you will be sure to have it out and a new one in when you want it to be. Now if the magazine sticks and cannot be extracted even by pulling on it....then you better have a sidearm that you can transition to.

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