Kevin Holman Posted January 27, 2014 Share Posted January 27, 2014 I had my first mag related failure on the timer in a match this weekend. Had to dump it go to backup mag. It was a PMAG 40 with a taccom +5, using the factory PMAG40 spring. It was bang - click - rack - bang - click - rack. Sometimes I'd get two bangs before click. It just wouldn't feed the cartridges up fast enough, and my bolt just went home on an empty chamber. The spring on a Nordic 48 rounder is about 1" longer, but the 3 round higher capacity and length makes the two springs about equal. Fluke? Link to comment Share on other sites More sharing options...
Durtywrench Posted January 27, 2014 Share Posted January 27, 2014 So far I've used my pmag with the extension in 3 matches and several practices and I haven't experienced any problems. Are these reloads? Have you tried same ammo in a different mag ? Link to comment Share on other sites More sharing options...
AustinWolv Posted January 27, 2014 Share Posted January 27, 2014 Not a single problem yet using PMAG40 + TACCOM+5 over the course of several matches, including Fallen Brethren. Used exclusively with factory M193 though. What length is your ammo? Any binding when you push the follower by hand? Link to comment Share on other sites More sharing options...
Kevin Holman Posted January 27, 2014 Author Share Posted January 27, 2014 Factory M193. 2.230" to 2.240" Been shooting this lot of ammo for many years, I bought a ton. No binding when working follower, but it is a bit "rougher" feeling on all my PMAG40's than on my Gen 2 30 round PMAGS. Nothing significant, and I cannot get it to hang up loading and unloading it. The bullets just rise up slowly. Link to comment Share on other sites More sharing options...
Alaskapopo Posted January 28, 2014 Share Posted January 28, 2014 I had my first mag related failure on the timer in a match this weekend. Had to dump it go to backup mag. It was a PMAG 40 with a taccom +5, using the factory PMAG40 spring. It was bang - click - rack - bang - click - rack. Sometimes I'd get two bangs before click. It just wouldn't feed the cartridges up fast enough, and my bolt just went home on an empty chamber. The spring on a Nordic 48 rounder is about 1" longer, but the 3 round higher capacity and length makes the two springs about equal. Fluke? I have 6 40 round pmags set up that way with no issues so far. Are you leaving them loaded? I don't maybe that is the issue. Pat Link to comment Share on other sites More sharing options...
AustinWolv Posted January 28, 2014 Share Posted January 28, 2014 Factory M193 That is what I'm using also. I'm assuming you've taken apart the mag and reassembled. Just wondering if the spring end maybe didn't get seated correctly? Or something like that...... Link to comment Share on other sites More sharing options...
TRUBL Posted January 29, 2014 Share Posted January 29, 2014 At this point......I'd have to either say fluke, assembly or parent magazine issue. We've got over a thousand extensions out there so far and this is the first issue of a failure we've heard of. standard lower? or some billet lower? I've heard that on some billet lowers you'd have to trim up the 'over insertion' tabs to make sure that the parent G3 magazines seats properly. I've not run into this issue with any mil spec lowers or the CTR-02 lower that I personally run. Tim Link to comment Share on other sites More sharing options...
ericm Posted January 29, 2014 Share Posted January 29, 2014 YAAAA!!!! REFUNDS FOR EVERBODY!!!!! (just kidding, Tim) ericm Link to comment Share on other sites More sharing options...
Kevin Holman Posted January 29, 2014 Author Share Posted January 29, 2014 Standard forged lower (believe it is a Rock River, would have to check) and been running this lower for many years. Young super light carrier, lightend rifle buffer, sprinco spring, Syrac adjustable gas block. Been running 100% since the day she was put together. I'll see if I can repro.... i'm sure hoping its a fluke. Good to hear it isn't common. Link to comment Share on other sites More sharing options...
Bullittmcqueen Posted January 30, 2014 Share Posted January 30, 2014 Used mine in 2 matches so far, one if which was a muddy mess, and no problems with mine. I do however download them by 2 rounds just as I would a standard 30 round mag. I don't know if that's necessary or not, but it's worked. Also , I was never able to get a full 48 rounds in my pmag +nordic extension so maybe that's another reason I've gotten used to down loading by 2. Regardless, no problems here. I've got 2 as well and have used both equally. Just something you may want to try. Link to comment Share on other sites More sharing options...
gondo Posted January 30, 2014 Share Posted January 30, 2014 Bet it wasn't seated completely, it will stay in gun when not completely seated, had exact same thing happen in qualifier not long ago. Link to comment Share on other sites More sharing options...
EaZeNuTZ33 Posted January 30, 2014 Share Posted January 30, 2014 Used mine in several matches without any issues at all. If say fluke, but if you have two of the 40rd PMAGs I would pull the springs and followers and see if there is any difference, just in case. Leaving the springs compressed for a long period of time? Link to comment Share on other sites More sharing options...
Jesse Tischauser Posted February 2, 2014 Share Posted February 2, 2014 The only problem I've had with my Taccom 45 is that it any stay full very long. Tim these should come with Ammo too Link to comment Share on other sites More sharing options...
Kevin Holman Posted February 2, 2014 Author Share Posted February 2, 2014 I found the issue guys. It has nothing to do with the TACCOM +5's. It is a tolerance stacking problem, caused by two things - my Young Machine superlight carrier, and a change in the PMAG design. Older Gen M2 PMAGS don't exhibit the issue. These PMAG 40's have a space between feedlips of .425" to .430". My PMAG Gen M2 and all my USGI mags have a space between feedlips of .450" or greater. What I found, is using the PMAG 40, there is MUCH more resistance seating on a closed bolt, even with an EMPTY magazine. The feedlips are rammed into the underside of the carrier into the feelip cut-out channels. With an empty magazine, there was a lot of resistance which was slowing down the bolt bigtime. If I cycled the bolt slowly on an empty mag, the PMAG 40 would even hang up the carrier and it would stop. I went and grabbed a BCM carrier (about as milspec as you can get) as this problem was non-existent. With the young manufacturing carrier, and a new PMAG 40, I can even see the carrier shaving plastic from the feedlips. I have been running this carrier since summer of 2011 through several seasons of 3gun without a single hiccup of any kind. So, the new PMAG's are definitely measurably different on the feedlips, but I tried the PMAG40 body (no follower or spring) in 6 other milspec rifles, and cant replicate the drag except for one, which is not as pronounced and is a WMD nickel boron carrier. Looks like I will be buying that JP LMOS carrier after all. I assume that is what 90% of you guys are running without issue on the PMAG 40's? Link to comment Share on other sites More sharing options...
AustinT Posted February 2, 2014 Share Posted February 2, 2014 Yeah, my LMOS/Pmag 40 combo hasn't ever bobbled. Link to comment Share on other sites More sharing options...
EkuJustice Posted February 2, 2014 Share Posted February 2, 2014 I run a standard weight carrier and non adj gas block as i have seen a lot more issues with the light systems than full weight systems Link to comment Share on other sites More sharing options...
Jesse Tischauser Posted February 2, 2014 Share Posted February 2, 2014 Wait another month it so for the Boomfab Ti carrier. You know you want one. Link to comment Share on other sites More sharing options...
HRider Posted February 3, 2014 Share Posted February 3, 2014 JP LMOS carrier and Pmag 40s work for me. No problems so far. Hurley Link to comment Share on other sites More sharing options...
troupe Posted February 4, 2014 Share Posted February 4, 2014 Sounds like I need to try this comb out. Will try and find some mags tomorrow. Link to comment Share on other sites More sharing options...
GreenDragon64 Posted February 4, 2014 Share Posted February 4, 2014 The only issue I have with them is that I don't currently own any ... yet. Link to comment Share on other sites More sharing options...
TRUBL Posted February 5, 2014 Share Posted February 5, 2014 Can't help you with the magazines......but we have the +5's ready to go. I've heard that the G3's (all G3's.....20, 30, 40 etc) were causing some issues with some mag wells, and all. Also.....people needed to down load one shell to get them to seat. When we designed the +5, we actually made it 1/2 shell dia longer to make sure that you can seat the mag with no shell stack issues. Some people have even gotten a little sneaky.....not used the factory lock plate, taped the extension on and got 46 rounds in their magazines. Go figure....3 gunners....always gettin one more. Tim Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now