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Posted: 8/2/2003 2:14:11 PM EDT
I blew the muzzle brake off my relatively new MT6400C (300 rds). I’ve only used Win white box until today when I tried Fed XM193. It had a noticeably larger muzzle blast. After 5 rounds, I noticed that the muzzle brake was missing. I found it 25 yds down range undamaged. Its roll pins were sheared in half on the inside diameter of the brake.
I’ve been thinking about changing to a different brake. Now may be a good time.  |
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Posted: 8/2/2003 5:33:37 PM EDT
[#1]
That is one hell of a reason to send it to kurt to have one of his brakes installed.I had him put one on my 20" HBAR and one of his flashhiders on my 14.5. look at his link u cant go wrong with his work
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Posted: 8/3/2003 10:28:27 AM EDT
[#2]
I bought 2 MT6400C rifles recently. One was made in March and the other in June. The one from March uses hollow roll pins to hold the comp. The one from June uses solid pins to hold the comp. Must be a product improvement.
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Posted: 8/3/2003 10:58:15 AM EDT
[#3]
Mine had hollow roll pins. If I decide to put the orginal back on, I make sure that thay are solid.
I've always like Kurt's work & been looking for an excuse to try him out. |
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Posted: 8/3/2003 3:55:12 PM EDT
[#4]
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Posted: 8/4/2003 9:14:46 AM EDT
[#5]
I have had two brakes blow of two 6400c rifles. Just like it was said, the pins simply sheared off. I am taking mine to K2 for a Wilson Tac Brake
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Posted: 8/7/2003 2:10:47 PM EDT
[#6]
Guys: I'll likely get a Colt 6400 sooner or later.......do any of you just leave the brake off? How deep are the little grooves that hold the pins?
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Posted: 8/8/2003 1:39:07 PM EDT
[#7]
JStor,
Someone posted a photo of a MT6400C w/o the brake in a earlier thread. I can only see 30 days back & didn't find it. If any one can find it, link the image to this post or bring the old post back to the top. |
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Posted: 9/2/2003 3:42:33 PM EDT
[#8]
Update:
I called Colt. They are using solid pins now. They won't send the new pins to me because they are "factory installed" & have to reinstalled at the factory. Not suprising, but other companies have sent parts free of charge, no questions asked. S&W sent me a new safety/decocker for beat-up police trade-in M4006. The support lady said "I know you bought it used, but safeties shouldn't break." Three days later, I had the part. HK even sent me a USP internal parts. Jstor, here's a photo without the muzzle brake 
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Posted: 9/3/2003 7:15:53 AM EDT
[#9]
The brake on my (second) 6400c is starting to come loose. I plan to shoot it off. Will this affect to crown of the barrel?
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Posted: 9/4/2003 2:07:41 AM EDT
[#10]
I don't know if I would intentionally shoot one off. The bullet didn't hit my brake when it blew off probably because the bullet had passed through the brake before the gas pressure builds up. However, if I knew it was coming off, I'd take it off or secure it better.
I don't think you would damage the crown. It is recessed pretty deep into the barrel. If for some reason the bullet did hit the brake as it blew off, you would damage the brake & send shrapnel every where, but the crown would be ok. |
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Posted: 9/5/2003 7:23:49 PM EDT
[#11]
This is the kind of gunk that lives and grows under the permanantly installed muzzle brakes guys.
This was under an AK brake I finally got to come off of a Bushmaster during firing. 
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