b'ADDITIONAL MOUNT AccessoriesCharlie and SilencerCo are federally registered trademarks of SilencerCo LLC and are of many trademarks owned by SilencerCo LLC. Griffin Armament is an independent manufacturer of parts and accessories that fit SilencerCo products, however is not affiliated with or A2 Mount Interfaceendorsed by SilencerCo LLC.1.375x24 MSRP: $175 DUAL-LOK 1.375x24 (HUB) Mount MSRP: $195.95DUAL-LOK Blast ShieldFDE MSRP: $239.95QD Blast ShieldMSRP: $195Optimus A2 Mount SilencerCoUNLOCKEDMSRP: $175 Charlie Mount DUAL-LOK 1.2875x24 Mount MSRP: $195.95 Interface MSRP: $195.95142 LOCKED'