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1/25/2018 7:38:29 AM
Posted: 12/12/2003 6:56:11 AM EST
I recently picked up an upper that had a cav comp attached. I need to remove it and then plan to replace it. The trouble is that I have sent 2 emails to Cav arms, with no reply regarding the size and length of the pin used to attach it. I need to drill it out and dont want to drill too deep and will need to replace it!

Link Posted: 12/12/2003 7:04:08 AM EST
Try [i]calling[/i] CavArms. They've said on their forum over in the Industry board that they get a lot of e-mails and sometimes lose them among the spam. But if the Cav Comp wasn't installed by them wouldn't know anyway. If you don't need to keep the Cav Comp intact it may be easier to carefully cut it down the side of it and remove it that way.
Link Posted: 12/12/2003 8:15:24 AM EST
Cutting down the side would not be a good idea as it is a preban threaded barrel. I want to drill out the pin and would like to reuse the comp but am not bound by it. Removing the comp without harming the barrel is the most important thing, thus looking for the length of pin. I will hold out a bit more before calling. Thanks, CH
Link Posted: 12/12/2003 9:32:07 AM EST
[Last Edit: 12/12/2003 9:32:50 AM EST by _DR]
Cape, there is a good chance they will not know what length pin was used unless it is a Cav Arms upper. They sell many of the Cav Comp brakes as separate items, that's how I bought mine. The gunsmith I use installed them as a service, and they provided the brake. The best way to remove it does not require knowledge of the pin length, but does destroy the brake (to save the barrel threads). I usually grind down to the pin head, then mill around the pin until there is enough of it exposed to pull it out with clamp pliers. Some gunsmiths (like mine) use a threaded pin or machine screw (with head ground off & welded over) so you might have to create a slot to unscrew it, or clamp and rotate it out - never force it or you could damage the threads. If you try to drill it out, you risk penetrating the bore (not good), or damaging the threads since it will be hard to control the depth. I would alway rather sacrifice a $25 brake than a $200 barrel. Anyway, good luck!
Link Posted: 12/12/2003 9:45:51 AM EST
The Cav Comp pin is 1/4" long x 5/64" dia.. The installer likely drilled into the barrel about 1/32"
Link Posted: 12/12/2003 9:47:29 AM EST
_DR, Thanks for the reply. The only reason I ask for the length of the pin is to limit the drill depth. The more I thnk about it the more I lean towards your method. I just hate to waste things out of my own lazyness. Thanks, CH
Link Posted: 12/12/2003 9:57:28 AM EST
I hate to waste too. I have even though about, if the Ban sunsets, dremelling out the end of the brake to open it up completely, then rebluing, and thus turn it into a flash hider so I don't have to waste it.
Link Posted: 12/12/2003 10:21:13 AM EST
Originally Posted By Tman: The Cav Comp pin is 1/4" long x 5/64" dia.. The installer likely drilled into the barrel about 1/32"
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Thanks. That is exactly what I needed. Now if I remove it without any damage, The barrel will stay 20". One way or another, it has to come off! CH
Link Posted: 12/12/2003 12:10:29 PM EST
Link Posted: 12/12/2003 2:31:38 PM EST
Sins, Thanks for the reply. I understand that you are very busy, and believe that you replied. Your right, tech is not perfect. As far as removing the comp, there wont be a need to send it off to have it removed. I will use the mill, which should give me enough control to remove that pin without any damage to the barrel. I am leaning towards cutting clearances on either side and pulling it out that way as suggested here. Thanks again, CH
Link Posted: 12/12/2003 7:30:00 PM EST
Don't forget to put a couple of layers of heavy duct tape or something similar over the exposed portion of the barrel - if the tool slips you could mar the finish.
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