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New 6.5 build

 
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  #1  
Old 11-30-2012, 07:35 AM
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New 6.5 build

So I've decided to have a 6.5 grendel built. To say I'm excited would be an understatement. I was thinking a lighter weight rig built for hunting Deer, coyotes, and groundhogs with the occasional piece of paper or steel.

Stag arms upper and lower
Alexander Arms 20" lite barrel
Jard 2.5# adjustable trigger
Hogue ergo grip
Ambi safety (I'm left handed but the rest of my family isn't)
Yankee Hill Smooth free float hand guard
JP Enterprises adjustable gas block
Ace ARFX butt stock

What type of mount should I be looking at (still thinking light weight)? I was thinking a weaver classic 4-16x42. for ample magnification and still lighter weight

any suggestions are welcome
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Old 11-30-2012, 08:16 AM
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Re: New 6.5 build

Why the long barrel and adjustable gas block? I have a Bobro mount for sale on another forum, its for 30mm tubes.
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Old 11-30-2012, 08:31 AM
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Re: New 6.5 build

Unless you're messing with suppressors or have some other special needs in mind, I'd have to agree with the question about the adjustable gas block. No real requirement here, especially in a standard length barrel, like the 20" you've mentioned. A 24" or 26" might qualify as a long barrel (and typical on most competitive guns) but yeah, expansion ratio matters a bunch. The 20" is a good choice to maximize performance in a very managable envelope.
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Old 11-30-2012, 03:15 PM
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Re: New 6.5 build

Quote:
Originally Posted by Kevin Thomas View Post
Unless you're messing with suppressors or have some other special needs in mind, I'd have to agree with the question about the adjustable gas block. No real requirement here, especially in a standard length barrel, like the 20" you've mentioned. A 24" or 26" might qualify as a long barrel (and typical on most competitive guns) but yeah, expansion ratio matters a bunch. The 20" is a good choice to maximize performance in a very manageable envelope.
Thanks Kevin that's what I was leading up to, no need unless suppressed. I cant see the utility of rifles with barrels longer that 20" except on the firing line, but I suppose lots of guys do.

I would pick another stock, if you stick with the barrel in your initial post your going to be so noise heavy your going to end up hating the rifle. A magpul PRS would balance out a 18024" barrel very nicely, or just stick with a standard A2.
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  #5  
Old 12-01-2012, 10:19 AM
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Re: New 6.5 build

So the adjustable gas block was suggested by the gunsmith building the rifle. I assume it it so he can "tune" it to the load? I told him I planned on shooting the 123grain amax and sst so I also assume he is planning on tuning the gas output to that load.
This is my first AR and I have no plans to suppress it. My friend has the magpul PRS on a 24" bull barrel and I was worried about weight if I went with it. I may look at the A2 if the gun doesn't balance well.
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Old 12-01-2012, 05:32 PM
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Re: New 6.5 build

Quote:
Originally Posted by 112Savage View Post
So the adjustable gas block was suggested by the gunsmith building the rifle. I assume it it so he can "tune" it to the load? I told him I planned on shooting the 123grain amax and sst so I also assume he is planning on tuning the gas output to that load.
This is my first AR and I have no plans to suppress it. My friend has the magpul PRS on a 24" bull barrel and I was worried about weight if I went with it. I may look at the A2 if the gun doesn't balance well.
Here read about the gas block
JP - Adjustable Gas Systems

I would seriously consider who your having put the rifle together for you, if he thinks that's what the gas block is for you may be in trouble. Suppressors are DIRTY they make your weapon DIRTY which can reduce the amount of gas available to operate the system (this is mostly encountered in DI SBRs in 5.56). The idea if the adjustable gas system is not new and several modern and much older designs incorporate this feature in there design. I really cant see how the added cost is going to benefit you in this instance.

Its so easy to build these your self its crazy, there are no special skill involved at all. Its like legos with a wrench.
building an ar 15 - YouTube
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  #7  
Old 12-01-2012, 07:01 PM
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Re: New 6.5 build

I appreciate your input. The adjustable gas block was the gunsmith's input. He is a trained gunsmith and teaches the gunsmithing class at his local community college. I trust this guy knows what he is doing.
As it is put on JP enterprises website:
"Most rifles are over-gassed and the resulting bolt slamming effect is a very significant part of the felt recoil impulse, which impedes sight recovery. We found that controlling the bolt velocity made for a much smoother shooting rifle. This easy-to-install gas manifold allows you to tune your bolt velocity to a particular load and optimize the feel of your rifle."
If he is able to tune the amount of gas output to the intended loading I want, then the rifle will apparently be smoother shooting. I am no expert on AR's, that is why I'm having a gunsmith put it together.
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