AR Sponsor
Posted: 3/17/2009 7:37:02 PM EDT
|
Hi
Building a 602 have a correct 602 barrel that has the early fsb with no drain hole but has the arrow that is the recessed one. From what I read it is supposed to have the cast type with the arrow that is raised like the one for the 601. Is this true? I have two cast fsb with the raised arrow that I could put on the barrel, is this impossible to do? Never have taken off a fsb before. Anyone know of a place to get a 602 upper from? Thanks |
|
Putting another FSB on can be the tricky part. The pins are not going to align properly, but if you have the tools, it can be done.
As for a 602 upper, your best bet is to just watch the EE and Gunbroker. Failing that, you could always make one out of a 604 upper. I have a 604 upper that is midway to either a 601 or 602, just can't decide which. |
|
Quoted:
Putting another FSB on can be the tricky part. The pins are not going to align properly, but if you have the tools, it can be done. As for a 602 upper, your best bet is to just watch the EE and Gunbroker. Failing that, you could always make one out of a 604 upper. I have a 604 upper that is midway to either a 601 or 602, just can't decide which. Which tools do I need any tricks to get the pins to line up? Can you redrill them? Would you want to? |
| Yes, you can redrill. That's not really an issue. The biggest issue is getting the FSB straight on the barrel while you're doing the drilling. There was a guy who made a jig over in either the Build it Yourself or AR Discussion forum, but I can't recall who it was. A jig would be great to use with a drill press. I had neither. My solution (which I didn't come up with - saw some pics of a fellow doing something similar online) was to attach the barrel to a beater upper, then turn the whole shebang upside down and place it on a flat surface. Then I aligned the 'ears' on the FSB and upper so that they were all touching and visually checked the alignment. I clamped it all down pretty tight using a C-clamp through the FSB and another through the carry handle on the upper. I also put a microfiber cloth between the C-clamp and the metal. Anyway, once I had it all aligned and secure, I slowly (I repeat, slowly!) drilled the new holes using a 1/8" bit (make sure you have a good one). You'll need a 2/0 taper pin reamer to ream the new holes (from right-to-left, mind you - look at how the pins are installed on the current barrel), and then once the holes are properly reamed, you install the new taper pins. Simple as pie, no? |
|
Quoted:
Hi Building a 602 have a correct 602 barrel that has the early fsb with no drain hole but has the arrow that is the recessed one. From what I read it is supposed to have the cast type with the arrow that is raised like the one for the 601. Is this true? I have two cast fsb with the raised arrow that I could put on the barrel, is this impossible to do? Never have taken off a fsb before. Anyone know of a place to get a 602 upper from? Thanks Of all the 601 and 602 uppers I have found..... Which were Five -601's. I only found two 602's. One I kept one and the other I sold. FYI- I have no more 601's either. |
AR Sponsor