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December 7, 2018, 08:11 PM | #1 |
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Join Date: January 17, 2017
Posts: 85
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BCA upper rail looks off
Hi all just got a BCA 450 bushmaster upper in. Im fairly new to ARs and this ones rail just looks a little off to me. It seems to be a bit lower than the “billet.” Should I complain about this. Thanks. Excuse me for any terminology misuse.
It’s also slightly loose on my lower and light can be seen on the other side. Again I’m hesitant to complain because it was only $260 after all Here’s the link for pics https://imgur.com/a/Td2f1OE |
December 7, 2018, 09:04 PM | #2 |
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Join Date: December 28, 2013
Location: Alabama
Posts: 395
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Not bad. If there's any room to work with, you can loosen the handguard screws, take an accessory like an optic, etc, temporarily mount it where a part of it grabs the rail on top of the hg and the other grabs the rail atop your receiver. Retighten the handguard screws and see if it aligned it any better. Regarding the gap between the rcvrs, very, very, common. There are remedies but not needed. Short of a match-only weapon, it will have no impact on function or accuracy. Probably 9 out of 10 have that gap.
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December 7, 2018, 09:09 PM | #3 |
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Join Date: March 15, 2010
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That does look not quite right to me as well. Might be ok if you only have an optic on the reciever itself, but if you have a sighting system that uses both rails you may have issues or run out of adjustment.
Most ARs will have some slop between the upper and lower. All of my civilian ARs have less slop than the M4/M16s I used in the army. |
December 7, 2018, 09:13 PM | #4 | |
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Quote:
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December 8, 2018, 04:07 PM | #5 |
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Unless you're really serious about mounting a front sight as a primary sighting--I never worry about it. Aero precision is the manufacturer that seems to be the most obsessed about having rails that clock exactly to their uppers--I would look to them if that's a really big deal to you.
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December 8, 2018, 06:11 PM | #6 | |
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December 9, 2018, 03:38 AM | #7 |
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Join Date: May 22, 2007
Location: Arizona
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Ditto - my Aero upper and handguard are almost monolithic looking in precision.
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December 9, 2018, 08:36 AM | #8 |
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Join Date: March 15, 2010
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To me, the rail on the handguard looks lower and turned to the right as compared to the upper’s rail. If so, should be entirely correctable.
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December 9, 2018, 09:06 AM | #9 |
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Join Date: February 2, 2010
Posts: 6,846
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I wouldn't recommend using a clamp on HG rail for mounting a front sight (or anything that requires long term alignment). W/o a solid connection between upper and HG, there's only a modest chance things will stay lined up during handling.
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December 24, 2018, 09:34 AM | #10 |
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It looks held on with fasteners to me. Loosen its screws, and if you have any picatinny accessory that can clamp to the receiver and rail, clamp it on there and to tighten the screws.
That's how I've ensured both of the free-float rails I've installed are lined up. I've got an M4 carry handle that I can crank down on it, and get everything all lined up.
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December 24, 2018, 03:39 PM | #11 |
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Join Date: November 5, 2016
Location: DFW, TX
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I've got a Seekins SPRV3 handguard on my 3Gun that's the same or worse. The problems is the where the screws are drilled for attaching to the barrel nut. The more you move the holes toward the upper, the less chance is will fit. I could always shave the barrel nut down to get a close fit. But since it doesn't effect function or accuracy, why bother.
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