KAK Lightweight Bolt Carrier Extension

-6061 ALUMINUM-HARD ANODIZED BROWN -FOR SPECIAL SUBSONIC APPLICATIONS WHERE LIGHTWEIGHT COMPONENTS ARE REQUIRED FOR CYCLING OF THE ACTION.-NOT DESIGNED TO BE FIRED WHEN FOLDED - DAMAGE TO THE WEAPON AND USER WILL OCCUR IF FIRED WHEN FOLDED-DIRECT REPLACEMENT FOR FACTORY MODEL AND CAN BE SWAPPED QUICKLY AND EASILY BACK AND FORTH .-RETAINING O-RINGS AND BUMPER O-RINGS ARE INSTALLED- .64 OZ.AR FOLDING STOCK ADAPTER NOT INCLUDED DOES NOT WORK WITH THE SYLVAN FOLDER