The lower section clamps securely with two alloy steel screws and nuts.
The Black Arts Design Barrel Band, AKA Barrel Support Stabilizer, reduces the likelihood of POI shifts from bumps to the barrel and ends barrel droop induced by moderators. Black Arts Design FX Wildcat Barrel Band No grub screws! The addition of carbon fibers increases flexural modulus (stiffness) well above standard PETG. TPU (thermoplastic Polyurethane). These bushings allow for a very snug fit but still allow a no hassle installation.