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Discussion Starter · #1 ·
I am in the market for new rails and front / rear buis. I found these on Troy's website but have not heard of anyone using them yet. Just curious if anyone had a chance to check them out.

http://store.troyind.com/Di_Optic_Apert ... fxx-00.htm

Also, I planned on mounting these on a Samson rail (personal preference). Since they will be mounted on the same 1 piece rail, I assume there should be no issues?.?
 

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rob-ss said:
I am in the market for new rails and front / rear buis. I found these on Troy's website but have not heard of anyone using them yet. Just curious if anyone had a chance to check them out.

http://store.troyind.com/Di_Optic_Apert ... fxx-00.htm

Also, I planned on mounting these on a Samson rail (personal preference). Since they will be mounted on the same 1 piece rail, I assume there should be no issues?.?
...i would go with these instead for the rear...

... http://store.troyind.com/Rear_Folding_B ... r0bt-0.htm

...they have same plane apperatures...so you don't have a change in you point of impact in elevation when you flip from one to another...

...if you are going with the Samson rail...i would personally use the Samson Sig specific folding front sight that mounts directly on the gas block...giving you a slightly longer sight radious...although the Troy front sight will work just fine mounted on the Samson rail...
 

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Discussion Starter · #3 ·
Ullie,
I was looking at the Sampson front sight but was unsure about zeroing issue with the front sight mounted on the gas block and the other on the rail (height mounting issue?). I've heard several issues on this forum with individuals having zeroing difficulties with aftermarket iron sites.
 

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rob-ss said:
Ullie,
I was looking at the Sampson front sight but was unsure about zeroing issue with the front sight mounted on the gas block and the other on the rail (height mounting issue?). I've heard several issues on this forum with individuals having zeroing difficulties with aftermarket iron sites.
...the Troy and Samson will both be the correct height when mounted with an AR height rear sight on the rear of the top rail...this assumes that your 556 doesn't shoot abnormally high or low...in which case you will have an issue with either zeroing for elevation...there are several remiedies for this...including changing out the front sight post to a taller one or filing it down a little...depending on whether your 556 is shooting too high or too low...this will be necessary with either the Troy or Samson...in fact...the Swiss have at least 5 different height front sights for this very reason...you should be good to go with either...i have the Samson front and haven't had any issues...
 

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I just received my Troy folding rear (AR height) and the Samson folding front (SIG specific). I just got back from the range attempting to sight the rifle at 25 yards and I ran out of adjustment hitting 2" low.
Any advice on how much to file down the front post?
Any particular type of file?
 

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Tom Morris said:
I just received my Troy folding rear (AR height) and the Samson folding front (SIG specific). I just got back from the range attempting to sight the rifle at 25 yards and I ran out of adjustment hitting 2" low.
Any advice on how much to file down the front post?
Any particular type of file?
I posted the formula to calculate the amount to remove on another thread, but here goes. All distances in inches:
sight radius x (POA to POI) / distance to target.

Assuming 18.5" sight radius and shooting at 100 yards, 20" difference between POA and POI (low, of course), you would have to remove 0.1"

18.5x20/3600 = 370/3600= 0.1027"

I would take the target measurement after resetting the rear sight, leaving 2/3 of up elevation adjustment left. I would also personally sight in at a longer distance, 75 to 100 yards.

Hope this helps.
 
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