Very good but not perfect - Riflespeed Gas Control .625in Assembly Block

I wish this option the 3.3 length had knurled edge like the shortest option has. I find it very difficult to turn. Make sure you have at least and inch protrusion past the handguard. I did multiple measurements and tried to go with the most integrated streamlined option but I really need a shorter handguard. Btw does not fit aero/atlas s one handguard. The section under the 1913 rail is not received in the center center so it hits the top of the gas block. I decided to modify the rail by grinding about an inch or so under the pic rail to relieve the the area where the gas block sits. It worked. Running a 11.3" barrel so deflection is minimal to zero on a pistol. Can't say it would be ideal on a 16" rifle. Long and short you can get it to work but you will have to modify your rail. I was committed to this rail for other reasons and did not want to shell out another 200-300$ to get something that definitely would have the clearance and then cerakote it to match an already painted upper and lower and risk it not matching.