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retro - the white oak barrel will determine which block you will use - they have 2 types: pinned, screw on - I went with a screw on type
edmorseiii said:Nice list. If you buy that WOA from Rainier Arms (http://www.rainierarms.com/?page=sho...product_id=449) and if you buy a bolt, or BCG, they will check the head space and match it.
So $350 for the upper
How much are we talking?
I just got the DD BCG in the mail today and it is sweet. M16 carrier, chrome lined and a chrome lined gas key. Well worth the extra $20.
On the sights $160 is a little steep for a single rear sight. Keep in mind the DD upper for $360 has the FSB installed so you only need the rear sight. I got a Troy buis for $110 from brownells. Check it out:
http://flic.kr/p/97gwQh
http://flic.kr/p/97gwWy
What, if anything, do people use as far as grease and/or loctite on assembly? I was going to use a decent grease for the barrel nut and barrel extension. Should I use red loctite on the set screws of my gas block?
What, if anything, do people use as far as grease and/or loctite on assembly? I was going to use a decent grease for the barrel nut and barrel extension. Should I use red loctite on the set screws of my gas block?
I have been reading a ton about twist rates and I have a question most of the shooting will be done with 55gr ammo but I would like the ability to use heavier stuff 77gr? (not match ammo) at shorter ranges <300yrd/meters will a 1:9 be okay or do I need to look at 1:7
I've shot with guys using 1/7 shooting 55gr at 150 yards at a 12x12' plate and getting solid hits while running and gunning.
Brownells recommends using Blue Loctite for the Barrel Nut.
8 moa, not really a good example of whether or not a 1/7 barrel will shoot 55gr
Yep, get some 55gr, bench the rifle and see if it will shoots it well. Every barrel is different.
My 1/7 WOA doesn't seem to like 55gr. It does like 69gr. so if I am shooting groups or over 300 yards, I use 69gr
At a past match, Noidlight shot the best score at 600 yards with 55gr with a 1/7 WOA, his barrel likes 55gr
I use grease or anti-seize on the barrel nut. You can put green loctite #609 on the barrel under the gas block. Red loctite on the screws
Yep, get some 55gr, bench the rifle and see if it will shoots it well. Every barrel is different.
My 1/7 WOA doesn't seem to like 55gr. It does like 69gr. so if I am shooting groups or over 300 yards, I use 69gr
At a past match, Noidlight shot the best score at 600 yards with 55gr with a 1/7 WOA, his barrel likes 55gr
So green loctite from say 4 o'clock to 8 o'clock?
Thanks.
That's interesting that there is so much variation.
I would think at 600 yards you would see variation depending on twist and bullet weight but the OP is shooting <300 yards, do you think he would see a major variation between 1/7 and 1/9?
I would go all the way around. I don't use it on my rifles, As I like to take stuff apart all the time. But if I was was going to build a rifle and not screw with it all the time. I would use it
Shouldn't I stay somewhat away from the gas port at least? I assume even if I cover 2/3 to 3/4 of the area, I'm still getting the benefit.
I basically want to be able to get this upper apart if needed but I don't plan on doing frequent changes to it. The place I bought it from recommended pinning but I didn't want it that permanent.
Any loctite that gets to the gas port will be blown out by the 60K psi. Run a patch through the barrel to clean any loctite out of there. You don't need to use much