Here's why you need a can lock for yer MAC!

[Gunbert]

This is what happens when you hand someone a mac and forget to tell them to hang on to the suppressor while they're having fun. With the macjack in it, I figure the tube at at least 5 rounds, if not 10+, during this particular failure.



members.cox.net/ljt3/DS1004/XS.jpg Crap, I can't link to this pic, so go here and look about halfway down the page. (http://www.ar15.com/forums/topic.html?b=3&f=14&t=206594)


Edited by RoverDave: Here's the photo
http://members.cox.net/ljt3/DS1004/XS.jpg


I really hope AWC can put this puppy back together.


Edited to add the link above, and to say I thought about what Dr. Dater said in my Arfcom thread, about why Gordon Ingram designed the threads on a Mac so large as to make it impossible to accidentally crossthread a suppressor in a high stress situation. Who the F*CK is going to thread on a suppressor in a firefight!? Off, maybe, but on? Sheesh, I hope he got a really bad hangnail or something for coming up with that thread pattern. :dunno

[tommygun2000]

Might not have been designed for "immediate" threading....just threading period without fucking up a fine thread in dirty, muddy, hurried, or total darkness conditions.

I see the logic in coarse threads and have bitched up my share of fine threads on bolts and other things in my life.
I prefer coarser threads if they can take the stresses, but a simple clip ring would have solved this problem easily.

[Vegas SMG]

Thanks for posting the picture. I was kicking myself when I got home for never grabbing my camera from the car. Been there, done that, although I can't say I've EVER seen a can puck it's guts out to a distance of 20+ feet as yours did. As I told you, I'd be very, very careful about who I let shoot my 3/4 X 10 threaded suppressor. As you know, it sucks in a big way when someone else screws up your equipment. It's worse when you're not offered at least partial compensation by the offender and I hope that changes at some point as this was operator error plain and simple.

Thanks for letting me use your new Beta in my '16 for a full dump. 100 rounds with a single trigger pull is a thing of beauty and I was amazed at how cool the barrel remained although I'm sure the gas tube was blazing hot. Hopefully I'll have mine this week. It seems like the H buffer may have solved your short stroking issue in your '16. Feel free to experiment with it until you're certain of it's effectiveness. Good to see you!!

[Gunbert]

Vegas_SMG, I can't complain, I talked to Tony just after you left and he said he'd split the cost of replacement with me. I wish he'd have offered instead of me having to ask, but shit, I'm sure he felt like crap and probably wanted to keep his head down.


I didn't realize that AWC had gone to K baffles. I hope they just consider this a retrofit with a few extra parts!

[tax_monster]

I don't understand why you have to hold on to the can - isn't that what the threads are for?

I've never shot a suppressed gun, so please educate me.

[stymie]

From my experience... AWC will charge as much for a rebuild as they would for a brand new can (which is essentially what they will offer).

[stymie]

Originally posted by tax_monster
I don't understand why you have to hold on to the can - isn't that what the threads are for?

I've never shot a suppressed gun, so please educate me.

& without a can-lock/ ratchet...
they easily unscrew during operation.

It is essential that on OEM cans, you hold on to the tube (with NOMEX) to keep it from rotating & creating baffle strikes. It doesn't take much to compromise alignment.

[Gunbert]

Originally posted by tax_monster
I don't understand why you have to hold on to the can - isn't that what the threads are for?

I've never shot a suppressed gun, so please educate me.



If that's the case I'll have a local smith here build me the internals, lord knows the damn thing is simple enough, and AWC will never get a dime from me for another can.

[Mario_FAMO,Inc]

I sent a can end over end off my MP-5 once a long time ago. The SCRC 3-lug locking device hadn't been fully engaged by me when I put it on the MP-5. It flew anout 20 - 25 feet or so.

It was an all steel can of older technology and the only damage was the first baffle was pushed up against the second for about 2/3rds of the circumference. I shook the lead and jacket out of it and shot it the rest of the day with no noticable difference.
Mario

[pmf]

I'd worry about the thing coming unthreaded on the coarser threads. There's not a lot of turns to get the thing on. I have a fake can for my M11/9 that I've never used for that reason.

[droog]

Why dont they use a left hand thread so it will tighten as it is shot?

[MadDog]

I wouldn't worry about the cost of the can rebuild - I'd be glad that your not being sued because someone got hurt with your stuff or worse!

I let some guy shoot my Uzi with the .22 kit and my Coastal can at a public range and I kept a close eye on him at all times. After he finished a mag I took my eyes off of him and that's when I noticed a real dumbass downrange changing his targets WHILE THE DUDE WAS FIRING MY UZI! One dumbass is bad; however, two take the cake!

Sounds like a 'cheap' lesson to me...MadDog

[Brian Ski]

Originally posted by droog
Why dont they use a left hand thread so it will tighten as it is shot?

Its not the left or right hand thread that causes it to loosen...Its the recoil of the gun...Thats why it is recomended to hold onto the can in the way that your hand will tighten it with your grip....If you follow.....But that only works til the can starts getting really hot!!!!...Basically a couple mags...

Also with the macs being such a coarse thread they tend to loosen easier...

It only takes a little bit of a loosen to drop the can a degree or more and you start getting baffle strikes...

[Vegas SMG]

FWIW, Gunbert had plenty of Teflon tape wrapped around the M11/9 threads and had his trusty strap wrench to tighten the can with. You 'gotta hold on to those MAC cans!!!

[pmf]

Better off just to get a sidecocking upper with a finer threaded barrel and buy a can to match. The stock mac upper sucks anyway.

[Gunbert]

I talked to AWC today, and it doesn't seem to be as bad as it could've been... they want about $300 to replace all the guts with the newer K baffles and a somewhat different internal design. I think I'm going to go nuts and buy the new HK 3-lug endcap for it as well, I just can't stand the thought of this happening again, and I want to use this can on a 9mm upper for my M16 as well, WITHOUT that genius Ingrams wonderful-fat-loosen-as-you-shoot threads. That's another $185 (sheesh!)


Funny thing is, not too long ago I was bragging about what a good deal I got on this can ($300). Karma's a bitch, gentlemen.