HomeGround SupportAviation BombsBETAB-500 CONCRETE-PIERCING AIR BOMBBETAB-500 CONCRETE-PIERCING AIR BOMB Categories: Aviation Bombs, Ground Support Product ID: 52491 DescriptionSpecifications Short Stroke Gas Piston Gas System (Rifle Length) 18.6″ Barrel Length ( Mid-Weight style, non-fluted) 1:8 Twist Rate Rifling Related products Add to WishlistRemove from Wishlist Add to Wishlist Grenade Launcher Add to WishlistRemove from Wishlist Add to Wishlist REMOTE CONTROL COMBAT STATION Add to WishlistRemove from Wishlist Add to Wishlist Hoitzer 105 , 155 mm.