Cohair C89K problems

[htony1]

I hope this isn't a dupe but my shooting buddy just picked up his first MP5K clone. Its a Cohair C89K stamped reciever and it is having issues with feeding, extraction, and what i think its an out of spec magwell.

Sometimes it deforms the empty casing and fails to extract it. Quite often it double feeds a live round behind the empty casing. I think the magwell is also out of spec because the magazines have a ton of wiggle room and so does the paddle. The end result is a gun that can't shoot more than about 5 rounds before a FTF, FTE, or hanging up for some reason.

I contacted Jayson at Investment Grade firearms but hes too booked to help me. Any suggestions about what i can do to get the issue resolved? Any similar experiences? Are there certain parts you can try that will help fix it?

Should I send it to Cohair? Are they good about fixing thier products that don't work?

Any suggestions or the contact information from Cohair would be great.

[jeray]

I would send it to Coharie. It's their gun, they will know how to make it right. If it's new it should still be under warranty, so let them do the work and try it again.

Contact info:

http://www.ensdesignstudios.com/CA/contact.html

I think that if you have another smith work on it, it will void the warranty and then Coharie won't want to work on it, or will charge you to fix it. Some people get bent out of shape about this, but I don't understand why. This is how it is with most non-firearm related manufacturers, so I can understand why they have this policy. If it's used and out of warranty, you might check with AviatorDave or Ghilliebear or some of the other very skilled builders that hang out here on the forum.

That's my $0.02

[darthvictor]

I am certain that you will void your warranty if you send it to anyone else but Cohaire first. Giving them another whack at it is the best option you have right now.

[retrodog]

Who's mags and what type are you using?

[oregonshooter]

Send it back, tell them EVERYTHING that is wrong and make them fix it.

Sending to any other smith will void the warranty.

[RossinFL]

Check the bolt gap. I bet it's off. Mine wouldn't take an HK K grip, wouldn't take a PDW stock, and had no headspace. I sent it back to them about a week and a half ago.

[localizer11]

What type of ammo and mags are you using? Try Wolf or S&B with a factory HK mag. If you are still having problems, then send it back to Cohaire.