AR Sponsor
Posted: 7/6/2016 9:15:31 PM EDT
I have a bit of issue with the rail on my new rifle. Perhaps I was a bit over confident when I decided to do it my self seeing that it said I needed a "competent qualified gunsmith" to install it. It was a really tight fit and it took quite a while to tap it into place. It aligned with the the index plate which i felt was good but it is ever so slightly off center. How the hell do I fix this, it so tight that I don't image i can rotate it. Below is a picture of what I am talking about, also a bonus picture with my new Plano case that I got for it.
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Quoted:
Holy shit! You'll never zero that rifle! It's done for! Throw it in the trash and start over! Goddamn OP it's less than a millimeter, shoot the fucking rifle and enjoy it Although I did not mention it, I am new to ARs and the building of them. I have just heard that it is important to have that aligned so I can slide an optic across it. It always catches, so I wasn't sure if it would be issue for anything like that. I'm not trying to be gentle and a perfectionist with my rifle I just want to know if this can and or needs to be fixed. |
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Quoted:
Maybe a pipe wrench and some cloth or cardboard to protect it? Is it really so tight that you can't twist it by hand? That would bother me too. The issue may be that I forgot to oil it a little before I installed it. I just used a heat gun and some muscle with the occasional hammer tap. |
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Quoted:
Although I did not mention it, I am new to ARs and the building of them. I have just heard that it is important to have that aligned so I can slide an optic across it. It always catches, so I wasn't sure if it would be issue for anything like that. I'm not trying to be gentle and a perfectionist with my rifle I just want to know if this can and or needs to be fixed. Quoted:
Quoted:
Holy shit! You'll never zero that rifle! It's done for! Throw it in the trash and start over! Goddamn OP it's less than a millimeter, shoot the fucking rifle and enjoy it Although I did not mention it, I am new to ARs and the building of them. I have just heard that it is important to have that aligned so I can slide an optic across it. It always catches, so I wasn't sure if it would be issue for anything like that. I'm not trying to be gentle and a perfectionist with my rifle I just want to know if this can and or needs to be fixed. Spanning the gap is exactly what you don't want to do. Get a cantilever mount if you need to move your optic forward. |
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Quoted:
Spanning the gap is exactly what you don't want to do. Get a cantilever mount if you need to move your optic forward. Quoted:
Quoted:
Quoted:
Holy shit! You'll never zero that rifle! It's done for! Throw it in the trash and start over! Goddamn OP it's less than a millimeter, shoot the fucking rifle and enjoy it Although I did not mention it, I am new to ARs and the building of them. I have just heard that it is important to have that aligned so I can slide an optic across it. It always catches, so I wasn't sure if it would be issue for anything like that. I'm not trying to be gentle and a perfectionist with my rifle I just want to know if this can and or needs to be fixed. Spanning the gap is exactly what you don't want to do. Get a cantilever mount if you need to move your optic forward. I didn't plan on spanning the gap, I just wanted to be able to slide over the gap to make sure it aligned. |
| I have a BCM rail as well. Mine was extremely tight as well going on and when it was in place, it seemed like there was no moving it what so ever. Mine aligned good, I just had it too close and had trouble getting the locking screws through. Use heat like the instructions mention, 60 seconds on, then try moving it. If it doesn't move, 10 more seconds and so on. Be careful with the BCM rails. I have the alpha so its a little stronger than the KMR. Being so lightweight, they are more susceptible to damage. |
| Unless you're using iron sights and not an optic, it won't matter. I too had a very tight fit on my KMR. Use a heat gun, or hair dryer and warm up the chamber end of the KMR. The heat will expand it and it will slip on easily. Use a carry handle or long enough optic mount base to align the top rails, and tighten down the mounting bolts. |
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