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2/2/2005 7:31:48 PM EDT
i just got my new M4 and it has oblong shaped handguards?...i had another in my hands about a month or so ago and it seems that i remember the guards being just round...i liked the feel of them,...but mine being oval or oblonged...kinda dont feel right,?? am i imagining this ??...or is this a new style??...it is a cierro upper
2/2/2005 7:37:48 PM EDT
[#1]
The oblong handguards you describe are correct "M4" handguards.  The round ones are CAR handguards.

For example, a 6920 will have M4 handguards while Bushmaster M4type rifles come with CAR handguards.  I believe the extra gerth is to accommodate the dual heatshields but I may be incorrect.

Scott
2/2/2005 7:37:53 PM EDT
[#2]
M4 are oval and IMO feel 100x better than the old skimpy CAR-15 style.
2/2/2005 7:40:02 PM EDT
[#3]
smaller ones are CAR-15 HGs; the bigger ones are M4 HGs
2/2/2005 7:41:02 PM EDT
[#4]
weird...i guess its just me....though i thought that the M4 that i held awhile back had Big Round handguards..meaty!   my sporter has the dinky ones...Thanks for the replies,...i feel better now...now where did i put those bullets?.....
2/2/2005 7:42:16 PM EDT
[#5]

Quoted:
M4 are oval and IMO feel 100x better than the old skimpy CAR-15 style.



+1

2/2/2005 7:48:29 PM EDT
[#6]
Have a 6721 and it comes with the CAR handguards - very round and small diameter.  Colt M4 upper on my other rifle has the M4s which are a bit oblong and much larger diameter.  I think you have the right ones.  Do you see double heat shields or single?
2/2/2005 8:04:22 PM EDT
[#7]
i think its single?
2/2/2005 8:42:29 PM EDT
[#8]
Many non-Colt rifles come with single shielded M4 handguards. While they retain the same exterior profile as the dual shielded Colt handguards many of them lack the second heatshield. For most people the lack of the second heatshield is a non-issue, since most shooters won't maintain the rate of fire necessary to make the handguards too hot to touch anyway.

Difference in profile between Colt M4 handguards and CAR handguards:



Dual heatshield Colt M4 handguards:







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