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Posted: 4/14/2009 6:55:00 AM EDT
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...and having a hell of a time. I am trying to remove it to install a YHM forearm. I had no issue when I did this with other rifles.
The pins will not budge! Suggestions Please? |
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Quoted:
Quoted:
Have access to calipers? If he was in Tampa I would let him borrow mine to see which end of the pin is larger. My BCM upper is at my parent's house and my calipers are at home. I'll bring my upper home tonight and see which side the pins taper for you. Thanks |
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Quoted:
Quoted:
If you have any way to estimate the size of the pins, such as marking the diameter on a piece of paper, do it. I had a BCM upper that had one pin installed from one side and another pin installed from the other side. Wut? No way!? Yeah. And one pin stuck out on the left and the other stuck out on the right. It shot fine. Just something to be aware of from a maintenance standpoint. |
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Quoted: Thank you everyone for the help. Instead of doing any damage and waiting for and paying my gunsmith, I ordered a set of DD Omega's from brightflashlights. Anybody wanna buy a brand new never been touched YHM LW FF carbine legth?  That works too. But for future reference, BCM uses taper pins, you were correct in the way you were pounding. I took some out of a BCM upper last week, one came out relatively easy, the other was a PITA. 1) If you don't have any, buy some Kroil brand creeping oil and a couple "needle" type oil bottles. Stuff is awesome on cleaning guns or loosening parts. You can get it at Brownells. 2) Buy a blow torch. I just have a small hobbyist one that works fine for what I do. Heating the metal AROUND the taper pins and then going at it helps. 3) You need a solid polymer block on a concrete floor. Wood will absorb too much energy. Forget the workbench. 4) You may need a big hammer. I had to use a 3 lb hammer, hitting it pretty hard. 5) The cheap nailsets from Menard's work well to get it started. You'll probably smash the tips of one or two, if not break one. 6) Stabilize the upper, wrapped in some rags against the floor for maximum energy transfer and so you don't scratch the receiver. I don't even screw with the small hammers and punches anymore. I kroil everything, heat it, and then give it a good whack or two with the big hammer and the nail set. Once you get that first bit of movement in the pin, you're GTG. Enjoy your Omega rail, I'm anxiously awaiting one too  |
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I checked with my calipers and you were in fact hammer in the right direction.
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SPEED OF LIGHT SHIPPING FROM BRIGHTFLASHLIGHTS!!!!!!!!!!
Got the DD Omega in FDE, (really dark FDE), and I don't know about $160 more than the YHM but... Definitely higher quality and much much much easier to assemble. Took all of 5 minutes to install. Here are some pix of the build and my assistant, Jack Daniels. I am still having trouble getting the YHM FH to "clock" correctly even with a new crush washer. 
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