Verify gas block height / handguard - POF USA Dictator Adjustable Gas Block

I purchased the Dictator for a 300blk 10.5” build I am putting together for my boss, he wanted a Ghost Elite Upper so that is what I have. After receiving the Gas Block I immediately began to install it. After installing and snugging the set screws (not torquing) just for a test fit, I went to install the hand guard. This is where I realized, not all (low-profile) gas block are the same height.. my Hand-guard is 1-1/2” (top to bottom). The Dictator Gas Block is 1-5/8” (top to bottom). Sadly had to return, now my boss has to wait another month so I can return it / get the store credit to buy the new one. Short story Short, DOUBLE CHECK YOUR HANDGUARD SPACING / GAS BLOCK HEIGHT!!!