AR Iron Sights
Am looking at installing fold down iron sights on my New Frontier LW AR-15, using a straight edge to compare, the top rail on the receiver is 1/4" higher than the short rail on the gas block end (16" barrel)....aren't rails supposed to be on the same level to work ? Any info or suggestions would be appreciated [:)], I've googled it but can't find any info. Thanks for any help. [;)]
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I'd be looking for tritium fold downs. Ask at http://www.brownells.com/ they should have the answer and the parts. 0 -
There are special irons made that will mount to the gas block and put the sights in proper alignment.
http://www.GunBroker.com/Auction/BrowseItems2.aspx?Keywords=gas+block+sight&Cats=0
Be sure they're metal and not plastic! The block gets hot and you don't want to wilt your sight![;)]0 -
Yes, the receiver rail height should match the front rail height - just checked one of my ARs with a right angle edge.
The alignment of the rear sight's center of adjustment (COA) with a set front post sight can be problematic. For example, in the case of a Yankee Hill folding front sight which has the gas block bolted to the barrel, I had to align the rear sight's COA with the front sight using a laser bore light. Loosening the gas block screws, checking the sight picture (i.e., laser dot) with point of aim (POA), retightening the gas block screws, and finally checking point of impact with the POA at the range. If you didn't do this way, you could end up with lack of windage adjustment or just an awkward looking rear sight aperture way of COA.0 -
quote:Originally posted by spirits
Yes, the receiver rail height should match the front rail height - just checked one of my ARs with a right angle edge.
The alignment of the rear sight's center of adjustment (COA) with a set front post sight can be problematic. For example, in the case of a Yankee Hill folding front sight which has the gas block bolted to the barrel, I had to align the rear sight's COA with the front sight using a laser bore light. Loosening the gas block screws, checking the sight picture (i.e., laser dot) with point of aim (POA), retightening the gas block screws, and finally checking point of impact with the POA at the range. If you didn't do this way, you could end up with lack of windage adjustment or just an awkward looking rear sight aperture way of COA.
Thanks Spirit, good info [;)] I was pretty sure the 2 rails should match on plane.0
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