AR-15 Grendel Caliber Twitter 6.5 Grendel Turnaround Time: Custom barrels are 2-4 weeks out on average. Email Address * Quantity * Caliber/Twist/Material * 6.5 Grendel - 1:8 - CM 6.5 Grendel - 1:8 - SS 6.5 grendel - 1:8 - CM - Shilen blank 6.5 Grendel - 1:8 - SS - Shilen blank 6.5 Grendel - 1:8.5 - CM - 5R Rifling 6.5 Grendel - 1:9 - SS Materials include Chromoly(CM) and Stainless Steel(SS) Add any Cerakote finish for only $10. Color * Cobalt Graphite Black OD Green Magpul FDE Tungsten Sniper Grey Burnt Bronze Stainless Steel In the White Try our Cerakote "Stainless" finish. It looks identical to bead blast, but doesn't soak up oils or scratch easily. Matching Bolt * Type 2 Nitride bolt - $75 Type 2 Nitride bolt with NIB carrier - $135 Submit bolt for headspacing Properly headspaced bolt for match level accuracy. Complete BCG is also available. If you already have a bolt that you'd like to use, send it in and have it headspaced to your new barrel. Return Policy Custom barrels are warrantied but not subject to full refunds. Length * Gas System * Pistol Carbine Mid Length Rifle Length Magnum Length Profile/Gas block size * HBAR (.750 gas block) HBAR (.875 gas block) Bull (.936 gas block) Light (.750 gas block) SOCOM (.750 gas block) Steel Gas Block * Non-adjustable .750" - $10.00 Non-adjustable .875" - $20.00 Non-adjustable .936" - $20.00 Adjustable .750" - $35 Adjustable .875" - $40 Adjustable .936" - $40 None All DSB barrels are dimpled for gas block alignment. Gas Tube * Yes - $12 No Threads/Crown * 5/8" 24 11/16" 24 Magna Port Gill Cut Target Crown Thread Protector * Thread Protector None Fluting * 6 Groove Spiral None Ground Finish * Stainless Steel Ground Finish None Available for stainless steel barrels only. Comments / Questions Please allow 24 hours for a response.