Stern defense sd mod5 m lok handguard 8” - Stern Defense MOD5 M-Lok Handguards

Stern Defense SD MOD5 M lok handguard 8” I used on pistol build. 8.5” barrel left enough room to install flash hider. I gave it 3 stars because I could not time it enough to not touch gas tube. The barrel nut is too tall which puts upper pressure on gas tube. It was difficult to get the gas tube passed the barrel but during installation. Not sure how this will affect barrel harmonics but it goes against what I think is correct for accuracy. Need to take to the range to see if I need to change it out.