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9/22/2017 12:11:25 AM
Posted: 11/28/2003 5:20:46 PM EDT
Was just reading the Jan 04 edition of Guns and Weapons and they have a Bushmaster XM-15 pictured on the cover with a slimline S.I.R. attached. They stated in the article that the handguard is made of synthetic materials. I have never handled a S.I.R. but thought thay were made from aluminum. Could someone clear this up for me.
Link Posted: 11/28/2003 5:32:46 PM EDT
Link Posted: 11/28/2003 6:23:40 PM EDT
They use some type special poylymer material that resists transferring the extreme heat to your hands, therefore stays much cooler than alum. under heavy firing. The vent holes and shape are also quite unique and help the overall weapon run cooler by allowing air cooling to work better than being totaly surrounded by hot alum. I think the Material in the SIR lower is very much like in the XM8. Tuff stuff. Jack
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