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AR15.COM
7/6/2008 12:45:18 PM EDT
Howdy all,

I just purchased a S&W M&P15 OR - which I believe has a Troy railed gas block. I purchased a set of MI sights - FFR for the front and a SPLP for the rear.

The rear looks & works great - the FFR seems to have a problem. If I put the sight on the block so the whole sight is over the block, the sight is locked into the down position if I mounted it in the down position to start with. If I mount it sight up, it will close down some, but not all the way before binding.

If I mount it so it hangs off the block, it works smoothly. I'd rather have it mount completely over the block - not only for looks, but for strength.

Is this the way it is supposed to work? Can it be fixed or adjusted?

Hope everyone had a fun & safe 4th of July,
Bob S.
7/7/2008 3:54:55 AM EDT
[#1]
Messer
The radias in the posts have been increased to solve this problem.please call the shop and we will get you out a replacement. this is the only gas block we ever had a problem with .
thank you
TROY
MIDWEST IND
262-896-6780
7/7/2008 6:43:22 AM EDT
[#2]
Thanks Troy,

I just spoke with customer service, and they will have a replacement out in the mail today. Great Service & thanks for the help!

Take care,
Bob S.
8/3/2008 6:39:21 AM EDT
[#3]
I think I might have the same issue.
I've used the FFR on an MI rail for a couple of years without incident.  However, I tried it out on an Adams Arms gas block, and there is a lot of resistance when folding and deploying the sight.