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Posted: 3/6/2006 5:44:59 PM EDT
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Does anyone know if it is possible and allowable to remove a Colt M4 (6400C) compensator and install an A2 flash hider? (This version also has the pinned stock, which I would like to change for the real thing.) I was going to add a picture but I can figure out how. The compensator is pinned on. I just would like the looks of the A2 better, as more similar to the actual M4. Anyone out there have any ideas. I would appreciate any feedback. Doug |
First off, welcome to the site.  Yes, the compensator can be removed and an A2 flash suppressor installed. I'd recommend sending the upper off to ADCO for the work. EDIT: Looks like RolandofGilead beat me to the punch while I was goofing around looking for ADCO's website. 
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Good suggestion to go to Adco, M4Madness. Thanks. I do have a couple of followup questions. Where is the start of the barrel, for measuring OAL? Is there a reference point on the outside of the rifle, like the front end of the ring, or the end of the receiver? The reason that I am asking is that the 6400C muzzle brake is longer (OAL ~2.25") than the A2 FH and because of this, I wonder if I may not have a long enough barrel to have the A2 installed and still make 16". Also, would someone tell me how to post a picture? Any info or suggestions would be appreciated! Doug |
With the bolt in place, drop a dowel down the barrel and mark it where it exits the barrel. OAL is measured from the face of the bolt to the muzzle.
I'm pretty sure that the 6400C has a 16" barrel. If so, an A2 flash suppressor would be legal.
1. First you need to sign up for a free picture hosting site. I use www.hunt101.com. 2. After creating an album, upload any pictures that you want to store on the host site. 3. When you have the photo(s) in the album, click on the thumbnail photo to enlarge it to full size. 4. “Right” click on the photo and scroll down to “Properties” and “Left” click. 5. Find the address in the box that appears. 6. “Left” click behind the address and continue to hold the button down. 7. Move the cursor to the left until the entire address is highlighted and release the button. 8. “Right” click and scroll down to “Copy” and “Left” click. 9. Go to your post or reply on AR15.COM and “Right” click in the text box. 10. Scroll down to “Paste” and “Left” click. 11. Add {img} in front of the address that you have pasted and {/img} after it, only substitute the brackets [ ] for {}. |
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Thanks for your tips on pics, M4Madness. This is my muzzle brake (if I have done it correctly). http://us.a1.yahoofs.com/users/41bdf866z4d8c9541/bb3a/__sr_/b085re2.jpg?phoEMGEB1LsV01zV If my barrel is long enough without the muzzle break (from ~bolt face as estimated on outside of rifle is about 16" to .1" short of first cutout on muzzle break), is there any advantage to not having the FH welded on? What are the pros and cons? Doug |
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The photo not showing up, which is strange. If I click the "QUOTE" button on your post, I can copy the picture's link, paste it into my browser, and see the photo. But for some reason it won't hotlink -- maybe the photo hosting site that you are using doesn't allow it. images.kodakgallery.com/photos1827/1/90/16/91/46/8/846911690107_0_ALB.jpg |
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M4Madness, I am now on another PC and that picture does not show up on this one. I see (or don't) what you are seeing. So I will try another web host and see if it makes a dif. Thanks for your coaching. To anyone, re: a fixed FH versus one that can be removed, any advantages either way? Doug |
A removeable flash suppressor allows you to swap flash suppressors at will, install a legal sound suppressor, or even install a free-float tube. You want to be able to remove the flash suppressor if legally possible. |
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Does anyone know what the barrel of the 6400C looks like under the pinned on compensator? Is it threaded? Do the pins go through the barrel. Or is the barrel grooved where the pins go through? My barrel is greater than 16" w/o the compensator. I would like to remove the compensator. Can I drive out the pins? Feedback from anyone would be greatly appreciated. Doug |
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