ACR Media and Info Thread

Armafield said:
How's your feed ramps?
Mine seem very sharp and destroys a round every mag.
I've ran the gamut of mags and the all work flawlessly through the DMR barrel.

Maybe buffing the sharpness out might help.
Click to expand...

Mine's been OK, but I've only had it to the range once - maybe a hundred rounds through it, if that. So far no problems...
 
My buddy's ACR in action at the recent 3gun Annual Redneck Championship in Lone Butte:

https://2.bp.########.com/-3xnl1V7dktQ/WWXPX6ATngI/AAAAAAAAohM/2SCVLEsdopozDUk2jVTYU2HXKJWuKcDNACKgBGAs/s1600/P7098689.JPG

https://2.bp.########.com/-mk24oMaAexg/WWXOroudpwI/AAAAAAAAohI/yJLVIb7uw_QcRYFvWKgF-ve3dFFAm38OgCKgBGAs/s1600/P7087534.JPG

https://4.bp.########.com/-p58cfTKfc9o/WWXOrlsXDuI/AAAAAAAAohI/XvBlaE5ojrMDHNiqPmY9p0cwK52zraptACKgBGAs/s1600/P7087553.JPG

https://3.bp.########.com/-0NdpAfOExNE/WWXOrvxgY4I/AAAAAAAAohI/5R0er5zhD4cl7Rj5Mq7KNq7RWnup7syzACKgBGAs/s1600/P7088074.JPG

https://2.bp.########.com/-BwCmh4o_uTQ/WWXOrp9uxCI/AAAAAAAAohI/NTNfR3mCrhM_7I1VGPmZ1lZ7IIgNGeKCwCKgBGAs/s1600/P7088389.JPG
 
Last December I finally bought my dream rifle. Non-Rest. Bushmaster ACR. Got it on the EE for a fair price. I love competition shooting with rifle. 3Gun, CQB that kind of stuff. Conversion I'm told was a Questar barrel done by them. Ive heard good things.





I got it home. Checked it out and realized that the gas block was canted off to the 1 o'clock position. Contacted the seller and notified him he says he has had no issues with the rifle so I figured I would try it out to see if it made any difference.



Further inspection revealed that the barrel nut locks up towards the 7 o'clock position. Again I made an assumption that this may be an aesthetic problem only and I should give it a try.





Took it to the range. It was a little more work getting this zeroed than any AR I have had. It's almost if it had a zero shift of a couple MOA every few rounds I fired. Finally it seemed to settle and I was printing 1.5" to 2.0" groups with Federal .223 ammo. Which is what I shot up to that time. Had one FTF malfunction. Round fed halfway into the chamber before getting crushed by the bolt. Chalked that up to a possible bad magazine.



Shot the rifle in a local CQB match in spring. Rifle performed admirably. No stoppages. Little long and heavy. Still learning the rifle and scope. Not used to scopes at all so scores weren't my best but still managed to post the best score overall for the day.

Started shooting 3 gun. About one a month. Have been having the same FTF malfunction as before. At least one a match. And after each one I try different Mags. After one match I did some reading and read that early ACRs were over gassed. Possible fix is new Gas regulator, piston spring, and recoil spring.

Also maybe my factory loads were too hot causing misfeeds. So I loaded some .223 with minimum charge. 55gr going 2650 fps. Real soft shooting. Cycles the gun and shoots about the same accuracy wise.

Shot another match soon after and rifle shot well. Had a malfunction on the last round of the last stage. Inspected the rifle for and my Alexander Arms mag the follower was stuck down so pinned that on the mag.

Then I shot the BC 3gun. Every other stage FTF. Real concerning. Seemed to be reduced by using ATRS mags but still happens. Got home and placed an order for the new ACR gas system parts. That's about where I'm at at this moment.



So I want to love this rifle. But it's not being very good for me reliability wise. Back of my mind every stage is where is it going to wad up?

So does anyone have an idea where this thing could be going wrong? Is the gas system over gassed? Does the canted gas block impede on the gas port? Or maybe the front trunnion is worn out/ out of spec?

If anyone has any suggestions I'm all ears. I really want to love this gun.
 
RaTFiNk306 said:
Last December I finally bought my dream rifle. Non-Rest. Bushmaster ACR. Got it on the EE for a fair price. I love competition shooting with rifle. 3Gun, CQB that kind of stuff. Conversion I'm told was a Questar barrel done by them. Ive heard good things.

I got it home. Checked it out and realized that the gas block was canted off to the 1 o'clock position. Contacted the seller and notified him he says he has had no issues with the rifle so I figured I would try it out to see if it made any difference.

Further inspection revealed that the barrel nut locks up towards the 7 o'clock position. Again I made an assumption that this may be an aesthetic problem only and I should give it a try.

Took it to the range. It was a little more work getting this zeroed than any AR I have had. It's almost if it had a zero shift of a couple MOA every few rounds I fired. Finally it seemed to settle and I was printing 1.5" to 2.0" groups with Federal .223 ammo. Which is what I shot up to that time. Had one FTF malfunction. Round fed halfway into the chamber before getting crushed by the bolt. Chalked that up to a possible bad magazine.

Shot the rifle in a local CQB match in spring. Rifle performed admirably. No stoppages. Little long and heavy. Still learning the rifle and scope. Not used to scopes at all so scores weren't my best but still managed to post the best score overall for the day.

Started shooting 3 gun. About one a month. Have been having the same FTF malfunction as before. At least one a match. And after each one I try different Mags. After one match I did some reading and read that early ACRs were over gassed. Possible fix is new Gas regulator, piston spring, and recoil spring.

Also maybe my factory loads were too hot causing misfeeds. So I loaded some .223 with minimum charge. 55gr going 2650 fps. Real soft shooting. Cycles the gun and shoots about the same accuracy wise.

Shot another match soon after and rifle shot well. Had a malfunction on the last round of the last stage. Inspected the rifle for and my Alexander Arms mag the follower was stuck down so pinned that on the mag.

Then I shot the BC 3gun. Every other stage FTF. Real concerning. Seemed to be reduced by using ATRS mags but still happens. Got home and placed an order for the new ACR gas system parts. That's about where I'm at at this moment.

So I want to love this rifle. But it's not being very good for me reliability wise. Back of my mind every stage is where is it going to wad up?

So does anyone have an idea where this thing could be going wrong? Is the gas system over gassed? Does the canted gas block impede on the gas port? Or maybe the front trunnion is worn out/ out of spec?

If anyone has any suggestions I'm all ears. I really want to love this gun.
Click to expand...

Not sure about the gas block without seeing it but it doesn't sound like it's causing a problem.
The barrel nut tightening just past center is not an issue, just make sure the handle is raised slightly when tightening it to make sure the ratchet remains engaged and give it a good crank (doesn't have to be super tight but good and snug).

If you feel like it's overgassed try it on the S setting, the suppressor setting bleeds off more gas to compensate for the backpressure of a suppressor so if it cycles better on S then you know the gas port was drilled too big.
I have a Questar barrel in mine and I've never had any problems. If changing the gas parts doesn't help PM me and I'll measure my gas port and we can try to figure it out.

Is it having issues with all magazines or just LAR and Beowulf?
 
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RaTFiNk306 said:
Last December I finally bought my dream rifle. Non-Rest. Bushmaster ACR. Got it on the EE for a fair price. I love competition shooting with rifle. 3Gun, CQB that kind of stuff. Conversion I'm told was a Questar barrel done by them. Ive heard good things.





I got it home. Checked it out and realized that the gas block was canted off to the 1 o'clock position. Contacted the seller and notified him he says he has had no issues with the rifle so I figured I would try it out to see if it made any difference.



Further inspection revealed that the barrel nut locks up towards the 7 o'clock position. Again I made an assumption that this may be an aesthetic problem only and I should give it a try.





Took it to the range. It was a little more work getting this zeroed than any AR I have had. It's almost if it had a zero shift of a couple MOA every few rounds I fired. Finally it seemed to settle and I was printing 1.5" to 2.0" groups with Federal .223 ammo. Which is what I shot up to that time. Had one FTF malfunction. Round fed halfway into the chamber before getting crushed by the bolt. Chalked that up to a possible bad magazine.



Shot the rifle in a local CQB match in spring. Rifle performed admirably. No stoppages. Little long and heavy. Still learning the rifle and scope. Not used to scopes at all so scores weren't my best but still managed to post the best score overall for the day.

Started shooting 3 gun. About one a month. Have been having the same FTF malfunction as before. At least one a match. And after each one I try different Mags. After one match I did some reading and read that early ACRs were over gassed. Possible fix is new Gas regulator, piston spring, and recoil spring.

Also maybe my factory loads were too hot causing misfeeds. So I loaded some .223 with minimum charge. 55gr going 2650 fps. Real soft shooting. Cycles the gun and shoots about the same accuracy wise.

Shot another match soon after and rifle shot well. Had a malfunction on the last round of the last stage. Inspected the rifle for and my Alexander Arms mag the follower was stuck down so pinned that on the mag.

Then I shot the BC 3gun. Every other stage FTF. Real concerning. Seemed to be reduced by using ATRS mags but still happens. Got home and placed an order for the new ACR gas system parts. That's about where I'm at at this moment.



So I want to love this rifle. But it's not being very good for me reliability wise. Back of my mind every stage is where is it going to wad up?

So does anyone have an idea where this thing could be going wrong? Is the gas system over gassed? Does the canted gas block impede on the gas port? Or maybe the front trunnion is worn out/ out of spec?

If anyone has any suggestions I'm all ears. I really want to love this gun.
Click to expand...

I had some problems before, last year I had to run without a brass deflector and it ran fine.
This year I had the the new brass deflector installed and had no problems

With the old deflector style I was getting the same problem as you

Try it without a brass deflector to see if it runs




Last year
 
I know some of the NR conversions were done with AR-sized gas holes drilled, which is too big and resulted in overgassing. On those NR guns (mine included) running it on the 'S' setting resolved the issues. Your specific issue sounds different, though. I'd suggest borrowing a complete barrel assembly from someone else and giving it a try or, as others have mentioned, try replacing the ejection port brass defelctor.
 
Round wire spring, and firing pin sticks to a magnet. I will take the brass deflector off next time I shoot it and see what happens. It's so odd that that could cause feeding issues.

I've ordered
Gas Regulator
Piston Spring
Brass deflector
Firing Pin
Firing Pin spring.

I hope those solve my woes.
 
RaTFiNk306 said:
Last December I finally bought my dream rifle. Non-Rest. Bushmaster ACR. Got it on the EE for a fair price. I love competition shooting with rifle. 3Gun, CQB that kind of stuff. Conversion I'm told was a Questar barrel done by them. Ive heard good things.


Further inspection revealed that the barrel nut locks up towards the 7 o'clock position. Again I made an assumption that this may be an aesthetic problem only and I should give it a try.



Took it to the range. It was a little more work getting this zeroed than any AR I have had. It's almost if it had a zero shift of a couple MOA every few rounds I fired. Finally it seemed to settle and I was printing 1.5" to 2.0" groups with Federal .223 ammo. Which is what I shot up to that time. Had one FTF malfunction. Round fed halfway into the chamber before getting crushed by the bolt. Chalked that up to a possible bad magazine.


Shot the rifle in a local CQB match in spring. Rifle performed admirably. No stoppages. Little long and heavy. Still learning the rifle and scope. Not used to scopes at all so scores weren't my best but still managed to post the best score overall for the day.

Started shooting 3 gun. About one a month. Have been having the same FTF malfunction as before. At least one a match. And after each one I try different Mags. After one match I did some reading and read that early ACRs were over gassed. Possible fix is new Gas regulator, piston spring, and recoil spring.

Also maybe my factory loads were too hot causing misfeeds. So I loaded some .223 with minimum charge. 55gr going 2650 fps. Real soft shooting. Cycles the gun and shoots about the same accuracy wise.

Shot another match soon after and rifle shot well. Had a malfunction on the last round of the last stage. Inspected the rifle for and my Alexander Arms mag the follower was stuck down so pinned that on the mag.

Then I shot the BC 3gun. Every other stage FTF. Real concerning. Seemed to be reduced by using ATRS mags but still happens. Got home and placed an order for the new ACR gas system parts. That's about where I'm at at this moment.



So I want to love this rifle. But it's not being very good for me reliability wise. Back of my mind every stage is where is it going to wad up?

So does anyone have an idea where this thing could be going wrong? Is the gas system over gassed? Does the canted gas block impede on the gas port? Or maybe the front trunnion is worn out/ out of spec?

If anyone has any suggestions I'm all ears. I really want to love this gun.
Click to expand...
I know that where my caliber conversions, He also has fixed Questar converted rifles that were not performing. I do not know exactly what the issues were, but you could try giving Herron arms a call to see if your issues are similar.
 
Brian46 said:
I know that where my caliber conversions, He also has fixed Questar converted rifles that were not performing. I do not know exactly what the issues were, but you could try giving Herron arms a call to see if your issues are similar.
Click to expand...
The ACRs Questar imported were 'grey market' and not eligible for the initial ACR factory recall from Bushmaster in Canada (performed by Gravel). Those of you around at the time will recall all the ACR trials and tribulations... Whether Questar ordered and performed the upgrades (doubtful) or sent the rifles back to the US (even less likely) is open to speculation. This isn't the first time (or probably the last) that Questar ACR-related issues have cropped up, though.
 
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