EXCHANGE REQUIRED, COMPLETE This kit is for the Crosman model 600 that pierces the CO2 cylinder in the compression tube cap, not the early version with the hole in the cap. It will also fit the model 677. It contains CRS150-054U, CRS125-047, CRS166-032, CRS600-047, BEN68AT-035. Your exchange part is CRS600-047 . EXCHANGE INSTRUCTIONS: YOU MUST HAVE AN EXCHANGE TO PURCHASE THIS PART AND IT MUST BE IDENTICAL TO PICTURE OR DESCRIPTION. WE CANNOT SHIP YOUR ORDER UNTIL WE RECEIVE YOUR PART. PLACE YOUR ORDER, SEND YOUR UNDAMAGED PART VIA USPS ONLY, USING A PADDED ENVELOPE, TO JGAIRGUNS P.O. BOX 830, MUNDELEIN, IL 60060. INCLUDE ENOUGH POSTAGE. DO NOT INCLUDE ANY EXTRA PARTS, THEY WON’T BE RETURNED. DO NOT REQUIRE A SIGNATURE, IT WILL BE REFUSED. DO NOT SEND US TRACKING INFORMATION. IF YOU WANT TO KNOW WHEN IT ARRIVES, USE YOUR TRACKING INFORMATION BECAUSE YOU WILL NOT BE NOTIFIED. IF YOU ARE WORRIED ABOUT LOSS, PURCHASE INSURANCE, WE ARE NOT RESPONSIBLE. ORDERS TYPICALLY SHIP 5-7 BUSINESS DAYS AFTER WE RECEIVE YOUR EXCHANG PART.