Muzzle Brake flew off (AR-15)

JeremyR

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Saskatoon, SK
Hi all.

My uncle and I were shooting my Stag 1R yesterday (I've had it for a couple months and have put around 75-100 rounds through it). My uncle was shooting and I was standing behind him. I thought I saw a clump of dirt or something go flying forward, then I looked at the car-BEEN and saw that the muzzle brake was gone. So I called a cease fire. Walked about 10-14 yards ahead, and sure enough, there's my muzzle brake.

I inspected the brake and there are no signs of a bullet hitting it anywhere. I noticed the roll pins have collapsed/bent and one broken. The brake did have a little movement/free play when I first got the gun. Nothing much, I think this is common. Or should it be dead solid? This is my first AR, so I'm not sure.

I also inspected the barrel bore and couldn't see any bulges or indications of an obstructed bore maybe causing excessive internal pressure (shouldn't effect the brake anyway I think).

We were using factory Remmington .223 55gr. ammo.

Shot the AR again without the muzzle break and everything seemed to function fine. I should point out that I did have a jam up before this. This was due the magazine follower binding up and not keeping pressure on the casings resulting in flopping around and getting caught from the bolt (-rant-Also, why can't mags be pinned to 5.5 rounds. Some mags are so tight when there full you can't insert them when the bolt closed.-rant off-).

I also field stripped the AR a few days proir to clean and lube it. I put everything back together properly so I don't think that was a problem either.

I think I'm going to get some new roll pins and put the brake back on. I might have to do a little filing depending if there's any mushrooms. What do you guys think?

Also, this isn't a razz against Stag or Walt or anything like that. I love my Stag (with my collapsible stock ;) ), and Walt, and Marlin, and all the other dealers who supply me with my addiction :runaway:. I usually do a search when trying to find info (imagine that!), hence my low post count. I couldn't really find anything relating to this. So I figured I'd post it so other people in the future have reference, plus I'd like to know myself. I'll probably give Walt a call to see what he suggests.

Here's some pics:
brake1.jpg

brake2.jpg

muzzle.jpg


Thanks guys, later.
 
We've got a retrofit kit coming for these this week with machined, hardened steel pins. Please send me your contact information and you will be taken care of. These were the first with this configuration, I'm sorry to hear of this.
 
OH Lucky Man

Hi all.

My uncle and I were shooting my Stag 1R yesterday (I've had it for a couple months and have put around 75-100 rounds through it). My uncle was shooting and I was standing behind him. I thought I saw a clump of dirt or something go flying forward, then I looked at the car-BEEN and saw that the muzzle brake was gone. So I called a cease fire. Walked about 10-14 yards ahead, and sure enough, there's my muzzle brake.

I inspected the brake and there are no signs of a bullet hitting it anywhere. I noticed the roll pins have collapsed/bent and one broken. The brake did have a little movement/free play when I first got the gun. Nothing much, I think this is common. Or should it be dead solid? This is my first AR, so I'm not sure.

I also inspected the barrel bore and couldn't see any bulges or indications of an obstructed bore maybe causing excessive internal pressure (shouldn't effect the brake anyway I think).

We were using factory Remmington .223 55gr. ammo.

Shot the AR again without the muzzle break and everything seemed to function fine. I should point out that I did have a jam up before this. This was due the magazine follower binding up and not keeping pressure on the casings resulting in flopping around and getting caught from the bolt (-rant-Also, why can't mags be pinned to 5.5 rounds. Some mags are so tight when there full you can't insert them when the bolt closed.-rant off-).

I also field stripped the AR a few days proir to clean and lube it. I put everything back together properly so I don't think that was a problem either.

I think I'm going to get some new roll pins and put the brake back on. I might have to do a little filing depending if there's any mushrooms. What do you guys think?

Also, this isn't a razz against Stag or Walt or anything like that. I love my Stag (with my collapsible stock ;) ), and Walt, and Marlin, and all the other dealers who supply me with my addiction :runaway:. I usually do a search when trying to find info (imagine that!), hence my low post count. I couldn't really find anything relating to this. So I figured I'd post it so other people in the future have reference, plus I'd like to know myself. I'll probably give Walt a call to see what he suggests.

Here's some pics:
brake1.jpg

brake2.jpg

muzzle.jpg


Thanks guys, later.

Its very nice to have a removable brake when Yankee law prohibits it - You have just convinced me to buy a Stag for my next purchase
 
Its very nice to have a removable brake when Yankee law prohibits it - You have just convinced me to buy a Stag for my next purchase

It's better when the user decides to take it off though . :redface:

Jeremy, I contacted Marlin today, he hadn't heard but he knows now. He'll have the pins once we do.

In the meantime, for anyone else with the roll pins in the compensator, most are holding, including mine, some seem to have the grooves more shallow and torsional force will collapse the roll pin. Check to see if they're loose and if they are drift out the pins and remove the compensator for now, or just remove it anyway. The gun is safe to fire regardless.

Stag has manufactured machined, hardened steel pins to replace these. Retrofitting is a matter of drifting out a pin and drifting the new pin in it's place. I'll be contacting people once they arrive and are in the mail. If you bought your rifle through a dealer, you can contact us for the parts directly, or go through your dealer.

Good eye to people who noticed the why to this method of pinning, we almost had it! Foiled by the pins!

:(
Walt
 
Last June I had a threaded flash suppressor work it self off my C7 and make its way down range about 10 feet.

I put thousands and thousands of rounds down range and I never ever seen a threaded FH fall off or loosen, so its looks like someone took it off and never put it on tight enough.
 
Jeremy, I contacted Marlin today, he hadn't heard but he knows now. He'll have the pins once we do.

In the meantime, for anyone else with the roll pins in the compensator, most are holding, including mine, some seem to have the grooves more shallow and torsional force will collapse the roll pin. Check to see if they're loose and if they are drift out the pins and remove the compensator for now, or just remove it anyway. The gun is safe to fire regardless.

Walt

Cool. Thanks bud! :)
 
i had a threaded one fly right off my 7 inch rra once
literally had it installed put 5 rounds through it and it took off like a rocket
kako and diopter there
 
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