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10/3/2012 8:57:18 AM EDT
Getting ready to pick up a new carbine upper, even though I don't need one.  I'm going either pencil or light profile.  Any practical differences between the two which would make you lean one way or the other?
10/3/2012 9:04:11 AM EDT
[#1]
"Pencil" and "lightweight" both used to be names for the same thing... the original "A1" profile or shortened derivatives thereof.

"Lightweight" has now been used by various manufacturers to mean all sorts of things that have no resemblance to an A1 profile, so really could mean anything less than an HBAR.  So it depends on which manufacturer's products you are looking at.
10/3/2012 9:14:18 AM EDT
[#2]
Looking at the PSA sale uppers.  Looks like the pencil barrel is .625 at the gas block and weighs 1.45#, while the light profile is .750 at the gas block and weighs 1.60#.  Decisions, decisions.
10/3/2012 9:48:24 AM EDT
[#3]
This is the PSA "Lightweight" profile



This is the "pencil" barrel (BCM upper)


Quite a bit of difference
10/3/2012 4:02:01 PM EDT
[#4]
Jcrowl,

      Do you have a preference between the two, or have you noticed any performance differences?

10/3/2012 5:10:02 PM EDT
[#5]
Bushmaster makes,or at least used to make a carbine gassed  "Super Lightweight" 16" barrel

You could have ADCO chop her off to 14.5 and shave the gas block add some light wt handguards pin your muzzle device and have a nice "super" light wt.
10/3/2012 5:26:03 PM EDT
[#6]
Quoted:
"Pencil" and "lightweight" both used to be names for the same thing... the original "A1" profile or shortened derivatives thereof.

"Lightweight" has now been used by various manufacturers to mean all sorts of things that have no resemblance to an A1 profile, so really could mean anything less than an HBAR.  So it depends on which manufacturer's products you are looking at.


Well put.  

10/3/2012 6:44:41 PM EDT
[#7]
Quoted:
Jcrowl,

      Do you have a preference between the two, or have you noticed any performance differences?



I like the pencil better, I have 3 of them now, just seems handier. The PSA LW is more like a standard middy (but I do like it as well).
10/3/2012 6:46:34 PM EDT
[#8]
Quoted:
Jcrowl,

      Do you have a preference between the two, or have you noticed any performance differences?



I like the pencil better, I have 3 of them now, just seems handier. The PSA LW is more like a standard middy (but I do like it as well).
10/3/2012 7:35:45 PM EDT
[#9]

What's the profile under the handguard?  Is it just a "government" type profile with the front a little thinner, or is the back end a little heavier to put it into the "midweight" camp?
10/3/2012 8:01:26 PM EDT
[#10]
Exactly. A Government profile middy barrel with the portion in front of the FSB just a tad thinner.
10/3/2012 8:17:00 PM EDT
[#11]
I have a bcm pencil and then when I bought my PSA 'light weight' I was in shock at the weight difference and was pretty fucking upset - so were some others on arfcom

They then changed their descriptions to 'lighter weight' and eventually they started selling the standard light weight barrels as 'pencil' and the lighter profile side by side

Is there a practical difference?  I was bit upset opening that PSA box, but no I haven't won a 3g championship with either

Also a neg 5 on how PSA handled this
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