Yes it is magnum size! - Kaw Valley Precision 2.25in Magnum Linear Compensator

Yes it is Magnum size! But I do believe it is what is needed for a 6.5 Creedmoor. Have not shot it yet. I have purchased 3 other Kaw Valley Linear Comps from Optics Planet in the past which were all the OPTMOD mini size for other smaller caliber firearms which all worked out well. It does what they say it does, it works especially well at the range to keep the neighbors happy. Great value for the money spent, others are more expensive. Optic Planet's shipping is not the quickest, but satisfactory. Definitely would purchase again.