|
||||||||||||||||||||||||||||||||||||||
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
I found a few more posts about troy sights possibly being machined bad and causing a tilt, i'll have to take a closer look at it. My buddie at work has a few different buis that I can try too.
Eotech is still in the mail so I'm not in a super hurry to figure this out
After installing my new Troy Alpha rail I noticed that my BCM 16" middy FSB is canted.
I always wondered why my rear MBUS was almost all the way to the left, but everyone said its normal and its just the sight.
Now with the built in sight on the Alpha, the rear sight is dead center, and I can see the shaved FSB canted to the left under the rail.
Im not really worried about it since I shaved the FSB and it will now just act as a gas block.
But is it possible that the gas port is not lined up properly?
The rifle has always functioned fine and certainly doesnt seem under gassed. (Perfect function with Russian ammo with H buffer is good enough for me)
Im just wondering if BCM lined up the gas port, causing the cant or if the cant is causing the gas port to be slightly covered.
Last edited by saddlerocker; 11-30-11 at 22:59.
This was the same thing I thought until I was corrected on AR15Armory.
What I was told that even if the front sight post is canted, it won't matter once the rear sight is adjusted left or right. Once they are moved over it will match it whether it 50 yards or 150 yards. It is because you are matching the rear sight to get in line with the front sight even if its way off, it wont matter.![]()
Im not saying your wrong, as you clearly know more than I, but I didnt remove the FSB, I cut/shaved it while on the barrel (ghetto, I know)
And again, from day one my rear windage was almost all the way left, and now dead center with the new built in Troy front flip-up.
And while probably unrelated, the only thing keeping the handguard cap from spinning freely was the gas tube.
Both these are moot points now that the handguard cap is removed and the FSB shaved. So no need to have BCM look at it, and not sure what they would do anyhow, considering I hacked it all up.
ETA: If you are just saying the GP is most likely lined up, I agree. Im not sure if you are addressing the FSB cant or the GP alignment, or both, I may have misread.
Last edited by saddlerocker; 12-01-11 at 13:24.
Took it off and took a close look at it, everything seems straight on it as far as the CNC'ing goes. I dont think the rear sight is the problem although it seems you have an issue with Troy...
I guess I can try to zero my eotech with the rear sight down and then flip up the sight for a comparison, right? If the rear sight is way off then I would know for sure its the BUIS vs. the FSB being canted too much.
I have a 552 and a 3x magnifier coming my way soon.
Steve0
I had this same issue a few months ago with a BCM upper. I sent it off to have a DD Lite rail installed and a muzzle break pinned(needed a gun I could take across state lines without having to notify anyone). Anyway, BCM was contacted and they agreed to look at it. I sent it in and they sent it back 2 weeks later good as new. Not saying they will do that for you, but it's worth a shot. Their customer service is outstanding and if it bothers you, it's definitely worth sending the upper in for inspection.
Bookmarks