comparing with a delton 16" middy HBAR, BCM 16" middy lightweight, BCM 20" rifle
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comparing with a delton 16" middy HBAR, BCM 16" middy lightweight, BCM 20" rifle
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So how many rounds fired are we talking about before accuracy suffers due to barrel heat with the pencil barrel? 15? 30? Will this come into play in a carbine course? An how fast is cool down?
What's the weight savings compared to a regular 16" middy?
i don't have a scale. Daniel Defense said their M4 pencil vs M4 govt was a 6oz difference. Im assuming it will be a similar figure for the middy even tho its BCM. Its also weight saved towards the end of the barrel so it moves the center of mass towards the shooter more instead of it dangling at the end of the barrel
Lightweight will cooldown faster because its less metal to cool, but it will heat up faster. Well it is govt profile under the handguards so I dont see its heat properties as any different than a govt profile. The end of the barrel is the part that has metal taken off. I dont see it being a problem on a semi. Heck M16A1s were pencils and they had automatic.
I think a pencil carbine barrel will be lighter, cuz there will be 2 more inches of pencil in front of the front sight tower
Last edited by ForTehNguyen; 03-23-10 at 22:46.
According to AR15barrels.com:
According to Bravo, the ltwt middy has:Gov't barrels usually have a long taper from 0.675" to 0.625" under the handguards.
My digital caliper is dead at the moment, but eyeballing the hash marks on it, the ltwt middy I got on Monday does seem to be 0.575" forward of the FSB
According to this post, should be about 4 ounces
yea I noticed the govt taper too, thicker at the chamber end for obvious reasons and thinnest near the gas block. Are all pencil/lightweights suppose to be govt profile under the handguards? I would think so for durability purposes
You can also see from the second pic, some extra metal is removed near the handguard cap. Man my Delton feels like a pole compared to the lightweight
No, there are straight .625 barrels like this:
http://www.ar15barrels.com/prod/lw.shtml
Which I believe is what DD is doing with their pencil bbls
saw a pic on G&R's website. Im assuming its one of there pencils. I could be wrong:
http://www.gandrtactical.com/cgi-bin...rchResult.html
I can see a taper from the chamber end towards the gas block. Forward of the gas block definitely looks like a pencil. If this is a pencil picture, it doesnt look .625" all the way through.
"PLEASE NOTE: These batches can sell out quickly."
Wow. They aren't kidding.![]()
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