JP Enterprises High Pressure Enhanced Bolt Assembly Group .308 Win. Black DLC. This version of the bolt is compatible with the JP LRP-07 and the DPMS LR-308 platforms (or clones thereof) only and cannot be used to replace bolts in the Armalite AR-10 platform (or clones thereof). Specifications for JP Enterprises High Pressure Enhanced Bolt Assembly Group: Manufacturer: JP Enterprises Finish: Black DLC Carrier Material: 8620 Steel Bolt Material: Steel Caliber: .308 Winchester Gun Make: AR Platform Gun Model: AR-10 Condition: New Projectile Caliber: .308 Caliber Package Contents: JP Enterprises High Pressure Enhanced Bolt Assembly Group What firearm models does the manufacturer say JP Enterprises High Pressure Enhanced Bolt Assembly Group is compatible with? The manufacturer says that JP Enterprises High Pressure Enhanced Bolt Assembly Group is compatible with AR-10JP Enterprises JPBC-EB308HP: High Pressure Enhanced Bolt Assembly Group .308 Win. Black DLC