Details, This WE G17/EU17 has a 24 round capacity magazine with a metal top slide and gas blow back feature. As this has a metal top slide we recommend using Green gas with this pistol. As with all Gas Blow Back weapons performance varies depending on ambient temperature and speed of firing. You MUST be 18 or over to purchase this. Please note this is a VCRA applicable Realistic Imitation Firearm. You must be UKARA registered (or have a defence under the VCRA) to purchase this as is, Please contact us or state your UKARA registration number in the comments box when you order. If needed we can spray this for you (at an extra cost of £10.00) so that it meets the requirements to allow anyone over 18 to purchase this. Please select this option from the menu above.