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Post by brodezoe on Feb 18, 2012 15:03:22 GMT -8
Me AGAIN with a question for those who probably know better than I. As I'm mentally putting together my AR in my head I just hit a snag in all of my planning.
As I've mentioned, I have a 20" Bull Barrel coming from BHW in the next month or two. I already have my flash compensator (JP Enterprises) purchased and here with me and I'm realizing one thing... I'll have my barrel and I'll have my compensator, but what do I do to get them to marry up properly? I know that a crush or peel washer is normally used to get them to match up correctly and under the right amount of torque, but I haven't seen ANY that have an outer diameter of .092(5). I really don't want to have a break in the overall smoothness of the transition between barrel and compensator.
I've picked up a couple of jam nuts from JP Ent. that share the same threading and outer diameter and am wondering if they're the solution to my quandry or if there's some other way.
Any thoughts or previous experiences that could help this 1st timer out?
Thank you !
brodezoe
EDIT: Just read through this and it seems a little confused. BLUF (though I guess this is really the end): Is there a crush/peel washer to use with a bull barrel and the equivalent sized compensator?
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Post by Master Yoda on Feb 18, 2012 15:37:58 GMT -8
A Dragons head size 1 is .920
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Post by brodezoe on Feb 18, 2012 17:20:22 GMT -8
Ok. So I'm "that guy". It appears that I didn't spend enough time searching the interweb before asking my question. I'm going to explain it the way I THINK I understand it and you all can correct me if I'm crazy.
Crush washers, peel washers, jam nuts all serve the same purpose. The purpose being to keep your compensator correctly aligned and affixed on the end of your barrel. Crush and peel washers slide onto the threading of your barrel end (as do all washers) and you then tighten down the compensator to the correct torque. They're, for all intents and purposes, a passive participant in the installation of your compensator.
Jam nuts take more of an active role in the installation in that you first thread the jam nut all the way onto your barrel end and then thread the compensator on. After that, you align the compensator correctly and then tighten the jam nut back onto the compensator to hold it in place.
I thought I properly searched, but I guess I needed to be alittle more patient with my friend and yours, Google. :-)
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Post by bravo5two on Feb 21, 2012 4:21:19 GMT -8
Bull Barrel coming from BHW in the next month or two. I already have my flash compensator (JP Enterprises) purchased and here with me and I'm realizing one thing... I'll have my barrel and I'll have my compensator, but what do I do to get them to marry up properly? I know that a crush or peel washer is normally used to get them to match up correctly and under the right amount of torque, but I haven't seen ANY that have an outer diameter of .092(5). I really don't want to have a break in the overall smoothness of the transition between barrel and compensator. I've picked up a couple of jam nuts from JP Ent. that share the same threading and outer diameter and am wondering if they're the solution to my quandry or if there's some other way. Any thoughts or previous experiences that could help this 1st timer out? Thank you ! brodezoe EDIT: Just read through this and it seems a little confused. BLUF (though I guess this is really the end): Is there a crush/peel washer to use with a bull barrel and the equivalent sized compensator? Perhaps I can help: 1) The crush washer WILL NOT mate with your bull barrel profile. It is made solely for timing of the std. 0.75" muzzle device. Timing is done through torquing down the device against the crush washer. The washer back push pressure is what will keep the muzzle device from turning. Not the best way to put a brake/flash suppressor on a nice barrel IMO. 2) Similarly, the peel washer WILL NOT mate with the bull barrel profile. Timing is achieved by peeling off the layer(s) of soft metal from the washer hence the name "peel" washer. Much better to use peel washer than crush washer. I've seen crooked muzzle brake on rifle due to crush washer resulted in baffle strikes. 3) A jam nut is an ugly alternative. It hold the muzzle device in check but leaves a gap between the barrel shoulder and the jam nut. 4) Best way is to time the muzzle brake/flash suppressor by filing the backside of the device to allow it to seat against the barrel shoulder and use a little red loctite to hold in place. Very time consuming but you will like the result much better. That is how JP Ent. timed their muzzle brakes on 0.920 barrels, smooth and no visible line between the barrel and muzzle brake. Sorry but since you obtained a bull barrel, the option for a nice brake/FS installation is very limited. I've done a few of the #4 above and very cool when done but need time and patience. Hope that helps.
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Post by brodezoe on Feb 21, 2012 7:08:28 GMT -8
That definitely helps, bravo. I wish I had the time/patience/resources to do option four :-) I'll just have to see what I can work out. Your reply gives me a good idea of what my options are at least.
-b
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Post by bravo5two on Feb 23, 2012 4:47:17 GMT -8
Glad my response helped. Good luck with your project!
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Post by stevexkr on Feb 23, 2012 10:10:20 GMT -8
I recently had the same issue on my 308 build. Bull Barrel with the JP Compensator, and didn't want to use the washers because I preferred the 'smooth' look. Without any washers my compensator would thread on, but end up about 90 degrees too far (See attachment). I found a gunsmith 1 state over (Plug for: shawn @ straight shooter supply in Oregon ( www.davidsonsinc.com/consumers/subsites/dealer_home.asp?dealer_id=52929) who machined it on for me so it's now a seamless fit. Was a decent price & fast turn around! (didn't take any after pictures yet, but the picture on the right in the attachment shows basically how it ended up looking) Attachments:
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Post by brodezoe on Feb 23, 2012 14:17:39 GMT -8
Hey steve,
What sort of turn around did the guy give you for the work on getting the barrel and compensator to match up? And, if you don't mind putting it out for the interwebs to see, what did you end up having to pay for it?
Man... I have everything else built and waiting, I just need the barrel. I'm not sure if my wife and I will have the patience to wait for something else! :-)
thanks for adding some pertinent info that's pretty close to home for my situation. The setup looks great BTW.
brodezoe
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Post by Master Yoda on Feb 24, 2012 16:55:08 GMT -8
You can order the size 1 compensator and have us blend it all together with your barrel and get it all at the same time, or supply your own.
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Post by brodezoe on Feb 24, 2012 17:56:17 GMT -8
You know, it's amazing that I didn't think of asking that. It makes SO much more sense.
I have the JP Rifles Large Profile compensator (http://www.jprifles.com/buy.php?item=JPTRE-5.58B.925). Would it be better for me to give a ring and talk with someone or could you give me a ballpark of what it would add to my barrel order here?
Thank you... glad someone was using their heads! :-)
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Post by dave29461 on Feb 24, 2012 21:27:25 GMT -8
Do you have the Size 2 Dragonhead available? I would like to add that to my order if you have it in stock.
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