It says not rated for 300blk out
The Superlative Arms AR15 .750in Clamp On Adjustable Piston System would require a handguard with an internal diameter larger than 1.6".
The Superlative Arms AR15 .750in Clamp On Adjustable Piston System will work with the handguards listed below.
Aero Precision - Enhanced Gen2 MLOK (both solid and clamp on)
Battle Arms Development - Rigidrail (solid)
Bravo Company Mfg's (BCM) - MCMR, KMR and QRF (solid)
F1 Firearms - H7 (both solid and clamp on)
Gibbz Arms - G4 (both solid and clamp on)
Geissele - MK4, MK8, and MK16 (solid)
Midwest Industries - Combat Rail (solid)
Rainier Arms/Fortis - Switch Rail (both solid and clamp on)
Rainier Arms - Urban Combat Rail (solid)
Seekins Precision - MCSRV2 (both solid and clamp on)
Wolfpack Armory MK3 (solid)
Yes, the Superlative Arms AR15 .750in Clamp on Adjustable Piston System can be used to replace your rifles direct impingement system. Ensure you select the correct gas system length for your barrel.
The Superlative Arms AR15 .750in Clamp On Adjustable Piston System can be used with a 14.5" barrel. However, you will need measure your barrel and compare it to the gas system length chart in the product images to ensure the system will work.