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Posted: 9/24/2004 2:37:03 PM EST
starting with a 16" HBAR how much weight do you save if barrel below handguard area is reduced to .700+- ? ditto, if barrel in front of front sight is reduced to .625 ? if you know of other contour/weight reductions, it would be very helpful
Link Posted: 9/25/2004 3:43:52 PM EST
well..no response so far..is there another source for this info? spreadsheet? dealer's site? anyone?
Link Posted: 9/25/2004 4:40:41 PM EST
BM tech support gave me the following info. I hope it helps.

Subject: Barrel Weights


Barrel Weight In Pounds ( for milled front sight subtract 0.2 pounds )

Barrel length_________Heavy Barrels________ Fluted Barrels

10"_________________2.0_________________1.9
11.5"_______________ 2.2_________________2.0
11.5/5.5"____________ 2.6_________________2.5
14.5"_______________ 2.5_________________2.2
14.5"AK_____________2.7_________________2.4
14.5"MY_____________2.7_________________2.4
14.5"AM (phantom)____2.7_________________2.4
14.5"IZ______________2.7_________________2.4
16"_________________2.7_________________2.3
16" Dissipator________ 3.0_________________2.6
20"_________________3.5_________________3.0
24"_________________3.9_________________3.1
26"_________________4.0_________________3.2

Military Style Barrels

14.5"M4_____________2.0
14.5"M4AK__________ 2.2
14.5"M4MY__________ 2.2
14.5"M4AM (phantom)_ 2.2
14.5"M4IZ____________2.2
16"M4 Dissipator______2.3
16" Superlight________ 1.9
16"M4_______________2.2
20"A2 (govt profile)_____2.5

Link Posted: 9/25/2004 6:50:00 PM EST
That's great info, thanks!
Link Posted: 9/25/2004 7:18:50 PM EST
All I can add is this...

I purchased a RRA chrome lined, mid-length 16" barrel from Pete in NH. It was HEAVY! I had it turned to approximately SPR contour AND fluted by Kurt at Kurt's Kustom. To my disappointment, it wasn't much lighter.

I then purchased a second, identical barrel from Steve at ADCO, and elected the "profiled" barrel option which takes the handguard area down to .625 or so.. (whatever A2 profile is).

The weight difference between the two barrels is quite noticeable.

Link Posted: 9/26/2004 12:43:49 AM EST
thanks for your responses
Onslaught..i'm new to contouring what is the dimension for SPR contour? is it only below the handguard? was the fluting only in front of the front sight?
Link Posted: 9/27/2004 6:28:12 AM EST

Originally Posted By IL_Shooter:
thanks for your responses
Onslaught..i'm new to contouring what is the dimension for SPR contour? is it only below the handguard? was the fluting only in front of the front sight?


The SPR uses a mid-weight profile under the handguards, I think it's .75" or .80". Thinner than an HBAR but heavier than the govt profile.
Link Posted: 9/27/2004 6:48:42 AM EST

Originally Posted By IL_Shooter:
thanks for your responses
Onslaught..i'm new to contouring what is the dimension for SPR contour? is it only below the handguard? was the fluting only in front of the front sight?


Maybe mine's not true SPR profile, because it's about .850 under the handguards. The fluting is UNDER the handguards only. (behind the front sight).

It's a really nice barrel, I just wish I'd spent all that money on a stainless barrel for an "SVR" (Short Varmint Rifle) Dissipator I'd like to put together.
Link Posted: 9/27/2004 7:35:07 AM EST

Originally Posted By Onslaught:

Maybe mine's not true SPR profile, because it's about .850 under the handguards.


That sounds about right for an SPR.
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