Undetectable Firearm Ban Extended Last Tuesday the US House of Representatives voted to extend a ban on undetectable firearms, including all-plastic guns, for another 10 years. The law had been on the books for 25 years and was coming up for a renewal. Originally enacted over fears of terrorists smuggling the (new at the time) polymer-framed Glock pistols on board an aircraft, the Undetectable Firearms Act of 1988 required that all firearms be detectable by metal screening machines and had to contain a minimum of 3.7 ounces of steel in their construction. The law was set to expire on December 9, 2013. Read Full Story H.R.3626 Enacted 12/9