Last year after hunting season, put ar with 50 beowulf upper up in the safe. At that time was shooting a 2" pattern at 100 yards on a bad day. About two months ago tried to put a BSA riser mount on it to bring the scope up to a more comfortable level. The rail on the mount was incorrectly sized, and the rings would not mount to the riser. Scrapped the riser and put the scope back on, same rings. Shot it about a month ago, and would not zero. 4" pattern at 15 yds, 30" pattern at 100yds, and that was when the shots even hit the target. Figured I messed something up. Rechecked scope and rings, nothing. Put an eotech on it and shot it yesterday, still patterning the same, even out of a secure rest. Where do I go next?
Issue With an AR, need advice
- Thread starter hounddog
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carbine85
Member
Try iron sights and see what it does, try diiferent ammo and clean the gun. Unless you damged the barrel or the crown it doesn't make much sense. I would clean it, use iron sights and different ammo and see what happens.
browningguy
Member
It sure sounds like a mounting problem. Generally if you've only messed with one thing (scope mount) and the rifle loses its accuracy it's the thing you messed with.
.50 Beowulf does generate some hefty recoil.
I have shot a couple of the rifles and while not unpleasant I wouldn't call them fun guns either.
No offense but I consider BSA stuff as borderline junk to begin with and the .50 needs a very secure scope platform, rings and a very decent scope.
Have you considered that the scope you are using may have been knocked out of kilter being used on this weapon platform?
You didn't mention what kind of scope you are using but if you are using a BSA riser I am wanting to guess the scope may be a Tasco or Simmons or Famous Maker eh?
Four suggestions:
1.Get an all steel riser.
2.Use steel rings, preferably with four screws per ring
3.Get a high quality scope, they cost more and they are worth it.
As a sideline, for all the good press, I am not totally convinced the Eotech can handle heavy recoil as well as claimed.
The Military went to AimPoints and for some very good reasons besides cost.
4.Alexander Arms ammunition also tends to vary wildly.
Quality control is mixed,,,,Reload your own for best results.
I have shot a couple of the rifles and while not unpleasant I wouldn't call them fun guns either.
No offense but I consider BSA stuff as borderline junk to begin with and the .50 needs a very secure scope platform, rings and a very decent scope.
Have you considered that the scope you are using may have been knocked out of kilter being used on this weapon platform?
You didn't mention what kind of scope you are using but if you are using a BSA riser I am wanting to guess the scope may be a Tasco or Simmons or Famous Maker eh?
Four suggestions:
1.Get an all steel riser.
2.Use steel rings, preferably with four screws per ring
3.Get a high quality scope, they cost more and they are worth it.
As a sideline, for all the good press, I am not totally convinced the Eotech can handle heavy recoil as well as claimed.
The Military went to AimPoints and for some very good reasons besides cost.
4.Alexander Arms ammunition also tends to vary wildly.
Quality control is mixed,,,,Reload your own for best results.
Gun had been stripped and cleaned prior to last range session. Optics were Zeiss. I tried the eotech because I had used it for 2 yrs in the past with good results. Was holding pattern on bushmaster ar prior to removal and placement back on the Beuwulf. Rings are weaver quad lock 1'' extension. Put scope on another ar (223) patterning fine. Used the BSA riser because I picked it up at a gunshow for $5. Figured it wouldn't hurt to try. Ammo may be an issue. Have not kept track of lot numbers, and last two range sessions were with ammo purchased sometime this year. Recoil is pretty hefty with this weapon, so I have tried to use only quality accessories.
Alright, we have those points covered.
Now take a look at the area of the barrel nut/delta ring.
See if the snap ring has popped free of the barrel nut and if the spring has pushed it back against the front of the upper receiver.
See if the gas tube is wanting to move excessively fore and aft.
Pull the handguards and see if the barrel nut has loosened to the point it has moved the gas tube off center causing the gas tube to bind on the carrier key.
Hopefully it is not so loose you can move it with hand pressure alone.
Look at the front sight base/gas block.
See if you can push it fore and aft, the bolt slamming forward may have caused the gas block to move forward a little bit if it was not securely installed, if the gas tube was out of alignment it may have also caused the end of the gas tube to become a little battered.
If you have a flash hider of some sort installed check to see if it may have begun to loosen up.
Last step, check to see if you may have shorn part of a bolt lug.
If all this checks out,,,,,and using proper safety procedures,
try manually cycling rounds through the rifle and see if the bullets are becoming deformed or set back into the case during the feed cycle.
Hopefully these checks will find the culprit if it isn't, as I suspect sight unseen, a bad batch of ammunition.
Now take a look at the area of the barrel nut/delta ring.
See if the snap ring has popped free of the barrel nut and if the spring has pushed it back against the front of the upper receiver.
See if the gas tube is wanting to move excessively fore and aft.
Pull the handguards and see if the barrel nut has loosened to the point it has moved the gas tube off center causing the gas tube to bind on the carrier key.
Hopefully it is not so loose you can move it with hand pressure alone.
Look at the front sight base/gas block.
See if you can push it fore and aft, the bolt slamming forward may have caused the gas block to move forward a little bit if it was not securely installed, if the gas tube was out of alignment it may have also caused the end of the gas tube to become a little battered.
If you have a flash hider of some sort installed check to see if it may have begun to loosen up.
Last step, check to see if you may have shorn part of a bolt lug.
If all this checks out,,,,,and using proper safety procedures,
try manually cycling rounds through the rifle and see if the bullets are becoming deformed or set back into the case during the feed cycle.
Hopefully these checks will find the culprit if it isn't, as I suspect sight unseen, a bad batch of ammunition.
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