I just ordered a 24 inch tube for my 6x6.8 build and am looking for the longest handguard that's available for the AR. I found that Strike Industries makes a 17" for about $200. I know Noveske makes one that's 16.7" but it's well over the $300 mark and seems to be about as available as a unicorn. Does anyone know of a company that makes one in the 18" range? This stick will be mostly for punching paper and maybe some varmints. Any help would be appreciated. Thanks.