Got a Sabre XR15A3 middy and like so far. When I sighted it in using the iron sights, I had to crank the rear sight almost to the stop (to the left) to get the windage where it needed to be. Could it be that the front sight/gas block (YHM flip up) isn’t quite right? Both sights look nice and vertical etc but I can’t explain why I need to crank in so much windage.
Secondly, the GI trigger on this thing was atrocious. I could pull the trigger through the miles of creep, stop before the break, release the trigger and it wouldn’t return to the original position. It was so gritty it’d just hang there. My RCBS scale (max 8lbs) was pegged out when I measured the pull weight.
So I polished the sear face and hammer notch lightly with a hard Arkansas stone, put a little plastic polish on the mating surfaces and dry fired a dozen times or so (then cleaned) and finally did the “boost” trick on the assembly. The pull is much cleaner and it breaks fairly consistently at 6 3/4 lbs now which I can live with. The trigger sear face has a nice bright shiny spot on it where it engages the hammer now.
However, after reading a lot of stuff here, I am learning that the hardened surface of the sear/hammer is very, very shallow. IF I went too far with my polishing routine, what can I expect as far as symptoms? The original sear surface looked like it was finished with a wood rasp. Just plain nasty.
All in all, I like the Sabre and I think it’s a quality AR.
No, I haven’t. I thought I’d bounce the question here first. I can accept the trigger. It’s just the way it is but the sight issue I’m not so sure about.
Just curious if there’s anything I can check to see if the sights were correctly installed. Given this is my first ever AR, I’m still deep in the learning curve.
Just plain nasty.