Linear Compensator

C

Canuck Clay

New member
So I recently purchased a Hera arms linear compensator for my sps tactical. After shooting approximately 40 rounds through the rifle I noticed damage to the compensator. Why would that happen? I shoot 223 with a 55gr vmAx.any thoughts as to why besides the obvious
 
Well it had a center hole with about 12 vents around it a bullet seems to have impacted the top taking out the metal between the top two holes in the 12 o'clock position
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Originally Posted By: blopez50Sounds like you've got an alignment issue or it worked loose.

Yep, just a little bit off center and it will make a big difference. I think this one either was cross threaded, cut off center, or worked loose.
 
Did you have it tightened down to the shoulder of your barrel threads? Were you using a crush washer? Did it loosen while shooting? If it wasn't tight, the tolerance in the threads could cause misalignment with the bore. Lock washers can do the same. A dab of blue Loctite will prevent loosening.
 
When I had my barrel threaded for mine the rifle went from pretty darn accurate to holes not on the paper. After much cussing I finally got on paper, keyhole. Looking back I found copper on the comp, obvious strikes. Back to the gunsmith, he said he just threaded the barrel, didn't pull the barrel and thread it concentric with the bore, so the bore was off from the exterior, which is pretty common. The only options at that point, cut the thread off and redo it or enlarge slightly the bore of the comp, which is what I did.

Even after that, for some reason the first shot after putting it on almost always keyholes, subsequent shots go fine though. It's a mystery to me, I just treat the first round as a throwaway.

If I ever put the barrel back on (it's a different caliber rifle now) with a suppressor on I'll have to redo the barrel though, too expensive to risk a strike.
 
Factory barrels are threaded between centers before installation to the receiver. I doubt this is the problem here.
 
Originally Posted By: CAFRFactory barrels are threaded between centers before installation to the receiver. I doubt this is the problem here.

this wouldnt be the first report of factory threading being non-concentric. check silencer based forums, you'll see it being all to common
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Originally Posted By: NdIndyWhen I had my barrel threaded for mine the rifle went from pretty darn accurate to holes not on the paper. After much cussing I finally got on paper, keyhole. Looking back I found copper on the comp, obvious strikes. Back to the gunsmith, he said he just threaded the barrel, didn't pull the barrel and thread it concentric with the bore, so the bore was off from the exterior, which is pretty common. The only options at that point, cut the thread off and redo it or enlarge slightly the bore of the comp, which is what I did.

Even after that, for some reason the first shot after putting it on almost always keyholes, subsequent shots go fine though. It's a mystery to me, I just treat the first round as a throwaway.

If I ever put the barrel back on (it's a different caliber rifle now) with a suppressor on I'll have to redo the barrel though, too expensive to risk a strike.


what kind of "gunsmith" threads a barrel without making it concentric with the bore?
i am no gunsmith, but have threaded about 15 barrels for myself and a couple of friends. had not run a lathe since junior high, bought a lathe and went to it. not hard to thread properly.

i would cut, crown, and re-thread that barrel. should take less than an hour even for a non-gunsmith like me!
 
Originally Posted By: 6724Originally Posted By: NdIndyWhen I had my barrel threaded for mine the rifle went from pretty darn accurate to holes not on the paper. After much cussing I finally got on paper, keyhole. Looking back I found copper on the comp, obvious strikes. Back to the gunsmith, he said he just threaded the barrel, didn't pull the barrel and thread it concentric with the bore, so the bore was off from the exterior, which is pretty common. The only options at that point, cut the thread off and redo it or enlarge slightly the bore of the comp, which is what I did.

Even after that, for some reason the first shot after putting it on almost always keyholes, subsequent shots go fine though. It's a mystery to me, I just treat the first round as a throwaway.

If I ever put the barrel back on (it's a different caliber rifle now) with a suppressor on I'll have to redo the barrel though, too expensive to risk a strike.


what kind of "gunsmith" threads a barrel without making it concentric with the bore?
i am no gunsmith, but have threaded about 15 barrels for myself and a couple of friends. had not run a lathe since junior high, bought a lathe and went to it. not hard to thread properly.

i would cut, crown, and re-thread that barrel. should take less than an hour even for a non-gunsmith like me!

The kind that makes for a grumpy me, that kind. I wasnt real pleased when he told me. I didnt even know you could do the work without pulling the barrel.

The rifle is a 20p now, if i ever reuse the 223 barrel ill probably address it.
 


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