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Posted: 4/4/2001 9:52:04 AM EDT
My Colt Match HBAR has a skinny barrel under the handguards as opposed to my new BM that has the same diameter as the barrel that is exposed in front of the handguards.

I guess at some time the barrel/upper was changed.  

Good or bad?  Everything seems to be working good so no biggie?  If not than what?

Just curious!

Link Posted: 4/4/2001 10:30:28 AM EDT
Some rifles have the skinny barrel under the handguards to save weight.  Is that what your question was about?
Link Posted: 4/4/2001 10:30:56 AM EDT
That is the profile of the military HBAR's. The skinny part is there to facilitate mounting a M203 grenade launcher, and also makes the gun lighter.

Link Posted: 4/4/2001 10:35:53 AM EDT
Thanx guys!

Was just wondering why the difference!

Link Posted: 4/4/2001 11:02:59 AM EDT
If it's skinny all the way back to the upper receiver it ain't no HBAR.  Someone may have switched uppers on you.
Link Posted: 4/4/2001 11:06:43 AM EDT
Yeah it's thinner the whole length, I'm not really concerned if it isn't the original upper or not.  It's a Colt barrel and I don't really let any of my rifle barrels very hot.  I was just wondering if it is detrimental.
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