Or is this a legitimate jam? Skip to 9:44 and you’ll see what I mean. I managed to do this 3 times on the same drill. Is this a double feed from seating (smacking) the mag too hard?
[video=youtube_share;i-BrCVkWBW0]http://youtu.be/i-BrCVkWBW0?t=9m40s[/video]
Looks like it. But then again I am up late and can’t be 100% sure. They cut away from it pretty damn quick.
You can make the first round pop free of the magazine hitting the mag - especially in cold weather where you can’t feel it. This is why it’s preferable to seat it more gently, then tug down to make sure it’s seated instead of slamming it home. Basically smacking the magazine too hard detensions the spring a bit while jiggling the rounds, which can let the top one bypass the feed lip it’s up against - and when the bolt gets sent it becomes a double feed.
Shooter induced double feed.
Inertia. She’s not kind. Smacking the mag moves the mag body, and the round stack wants to stay put. If you hit it hard enough to allow the top round in the round stack to lose contact with the feed lip, it can go “free agent” and end up between the feed lips as the spring pushes the round stack back up. Now you’ve got a floater in the feedway, and when the bolt goes forward, you strip a second round off the top, and…booyah. Party in the feedway.
Pushy/pully. No smacky/whacky.
This all makes sense. I would like to point out that everyone was having seating issues likely due to the cold and snow so the push pull method did not always work as you can see toward the end of the video. With the shitty weather conditions and cold hands coupled with the adrenaline under a time constraint I did not realize the force of my smack wacky.
Rob - How do you recommend fixing this type of malfunction should it happen again? Muzzle to the ground to crate enough resistance for the shooter to rip the mag?
Thanks
If you can observe that this has happened before smacking the bolt release or slingshotting the charging handle, it’s as simple as stripping the magazine and most of the time the floater will just drop free through the magwell - it’s just a bolt lock reload from there.
Once it’s turned into a party at the feed ramps, then it’s the same as any other double feed - lock bolt to the rear, strip the magazine, clear out any brass orgy that’s still going on, then reload the magazine and send the bolt home.
Same as clearing any other double feed.
Just curious…how was the rifle setup for the drill? Pre smacky-whacky…or we’re you just doing a bolt lock reload?
I’m glad you posted this. It’s a good visual reminder to not go apeshit on the mag when inserting it.
That’s not really the whole story - when it’s cold a balls (and you can’t feel your hands well, and are basically struggling just to crab claw the magazine into the magwell in the first place) on top of tired and under time pressure: this is a very easy malfunction to induce. Therefore : train to really do it the right smooth way (get the front of the magazine in, rock it back, slide it up gently, push then pull to make sure it’s locked) even in good conditions so the muscle memory is there to get it right in all conditions. It won’t feel like you’re going apeshit if you whack it just a little too hard, it’s just going to feel barely fast enough to get back on target, then the trigger will be mush without a bang sound.
I believe this was set up as a type 3.
I just had one of these tonight. Thought the bolt was closed when it was open, ignorantly slapped the mag home too hard, released the bolt and bam, cartridge over bolt with a double feed.
It was extremely challenging getting the cartridge from between the bolt and the upper. Guess I’ll never do that again any time soon.
(30 round PMAG)