First impact? Never owned one before? May I suggest you get an entire o ring kit for the gun. It’s not saying anything bad like it’s a leak monster, but understand that an impact probably has the most o rings out of any other pcp out there. I own two of them, had them now for a total of 2 years on one and four on the other, and between the two I have resealed them each at least twice, and some areas like the regulator three or four times. Still love the platform!
I’m gonna do you a favor, though, but it going to take effort on your part. Go to fx swedens website and go to the support section, and you’ll find parts diagram downloads for all their guns. Pull up the drawing on your gun and highlight all items saying O Ring and jot down the sizes, the type(NBR is Buna and PUR is polyurethane), and the durometer rating(NBR 70 or NBR 90).
Sizes given- first number is inside dimension second number is thickness.
Then go to oringsandmore.com and go the the metric buna section and start creating your order list. You will find typically it comes 25 o rings per order, meaning, when it’s all said and done you’ll have enough o rings to reseal your gun 25 times!
Total cost, and this is where you’ll thank me, will be at around $25 or less including shipping, way cheaper than the captain o ring kit that gives you enough to seal that impact one time.
Good luck
