Yes but not much at all.
Brief Can-am socom 18 review
- Thread starter I <3 M14
- Start date
Yes but not much at all.
that barrel is screwed on incredibly tight. When we re-indexed my barrel, we needed a 5 ft breaker bar to move it. It does not "loosen" such that you would would need to be concerned of such things.
You are merely "changing its position" in the receiver
- Location
- Toronto, ON
Question - Does correcting the indexing change the headspace? If a barrel is over-indexed and you loosen it, does this also cause an expansion in headspace?
Thx.
In a rifle with headspace above the 'field' specs, would it be better to leave it out of index then? I suppose the real solution is to fix the indexing and source a new bolt to deal with the headspace?
AWESOME
That never occurred to me but it makes sense that that screw isn't going to hold up against a 5 ft bar.
I know what Im going to be doing next week
Cheers.
Lexthedestroyer
CGN frequent flyer
- Location
- Abbotsford, BC
Quick question here guys. Say my barrel is over indexed. Would it be a safe assumption that my headspace is tighter than not? Say I'm planning to mount a scope to it, and it functions fine otherwise. Would I better off just leaving it as is? I guess my question is, is headspace determined prior to barrel indexing? Or after?
Easy to figure out the change in headspace. Take the thread pitch (as a decimal) and multiply that by the degrees indexed, then divide by 360. It will be a very small amount. Definitely less than one thou (.001")
(tpi x deg)/360 = headspace change
(tpi x deg)/360 = headspace change
The problem with trusting the flashider as an indicator for barrel index is, as you indicate, it must be straight. From what I have seen the majority of norinco flashhiders are not machined anywhere near precise enough to use them as an indicator for barrel index. In fact, I would say in most cases, what appears to be an out of index barrel is actually a crooked flashhider (offset splines and or angled dovetail) or canted front sight. I would only consider using the flashhider as an indicator of barrel index if it was an aftermarket NM or similar, assuming the Norc barrel grooves for the flashhider splines are true.
HassanZeDragon
Member
- Location
- Quebec City
They used to mill the odd sight base on the flash eliminator at an angle .
Good to see they kept up that tradition ..lol .
And someone at the factory actually adjusted the sights on it and shipped it out .
My sight base is exactly the same, is there any replacement part for this available online?
Contact Canam and they will send you a FTR..(free shipping label .) for the part and they will exchange it .
There are aftermarket ones out there as I bought another rifle with one on it already .... it was 22 inch barreled Norinco and the gas lock has a nicer finish on it but looks the same.
HassanZeDragon
Member
- Location
- Quebec City
I tried asking Canam , they dont have any spare part
SEI makes one , Did you buy the rifle new ?
Brownells sells them but not sure if they ship them to Canada
h ttp://www.brownells.com/rifle-parts/gas-system-parts/gas-system-hardware/locks/m14-m1a-gas-cylinder-lock-sight-dovetail-prod25226.aspx
h ttp://www.nokick.com/SEI_M1A_Gas_Lock_with_Dovetail_for_18_Barrel_p/sei%20gl-dt-18.htm
Brownells sells them but not sure if they ship them to Canada
h ttp://www.brownells.com/rifle-parts/gas-system-parts/gas-system-hardware/locks/m14-m1a-gas-cylinder-lock-sight-dovetail-prod25226.aspx
h ttp://www.nokick.com/SEI_M1A_Gas_Lock_with_Dovetail_for_18_Barrel_p/sei%20gl-dt-18.htm
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Yeah, oddly enough, the trigger I got with a SOCOM18 is far superior to both 18.5" shorty and 22" standard M305s that I've fired. FAR, FAR superior. Less creep, lighter pull, crisper break. Guess I got lucky there.
