Well sadly non of the above wrked, this pistol is still only producing half of the advertised power. Unfortunately, a) I have lost the receipt from Greenfields who in all fairness offered me a replacement gun and b) I have been fiddling with it so have probably voided my warranty. £110 for a pistol that didn't match up to the advertised specification plus the expense of all the add ons that I purchased in good faith saying that they would produce the required result. Not bank breaking disasters but my trust in some things (like GMAC Customs and Crosmans) is a thing lost for ever.