frt sight is leaning

[mannparks]

std m2 16" bbl, frt sight base is listing 3/16th too the right. were does the problem lye.
its a DSA mfg.
thanks.

Information

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[RCS]

It appears to me, that one of the tapered front sight base pins could be at fault (it could be both pins if they were not installed correctly) a gunsmith who is familiar could fix this problem

[browningautorifle]

If this base came from another rifle, it probably will give you that symptom. I found swapping around FSB wasn't the best idea. Others here have disagreed, saying if they were milspec, they'd be OK. Not my experience though. But as RCS says...maybe the pins are coming in from the wrong side.

[mannparks]

To the best of my knowledge the fsb is original, and the barrel also .
does not look like its been removed.

This is not my rifle trying to help a friend.
Rear sight must be all the way to the right to get on paper.

[browningautorifle]

It must have been removed, they don't lean from the factory. I did however once buy a new flattop receiver that had the top out of whack. It leaned a bit and iron sights were impossible. Changed to a Cerro forge done by CMMG and the problem was solved. I sold the wacky upper...

[Bill Hollinger]

Years ago there were some original 20" USGI barrels showing up at the gun shows still wrapped in the foil paper and all of them had the gas block/sight base off about 3/16" or more. This was way before the internet and I have no idea what the outcome was. I went through three before I got one straight. One of the gun show regulars named Dirk Seely had some.

[RCS]

I think Bill Hollinger may have the answer - a bent barrel ! I seem to remember that there was a gage that went inside the bore to detect a bent barrel ?

[browningautorifle]

I have one here. It's about 6" long, in the white and hardened. Just drop it through...if it catches at all, there's something amiss.

[mannparks]

Well this is a flat top upper.

This is a DSA lower and the fella called me last night and DSA said they will make it right.
Oh well , we will see.

[madcratebuilder]

The FSB is located by the tapered pins, it may have been reamed offset. You can buy the reamer from Brownell's as a gunsmith tool $$$ or from a machine shop supply as a 0/2 taper reamer for $. You may be able to correct this by reaming and installing new taper pins, possible a new FSB also.

You could replace the FSB with a clamp on model with set screws.