H&k mp5 pdw magazinegenuine umarex sparepart number 5.8159.1feeds bb ammunition flawlesslycaliber: 17741 round note to ebay: this item is for use with airsoft bb only, this is an accessory only. This item has been listed in accordance with the bb guns, pellet guns & air rifles policy & won't work with any firearm, it does not breach any seller's rules. Silco sports delivery we endeavour to have all orders dispatched within 1 working day of cleared payment we cannot guarantee a specific date or time for delivery but if the item is needed urgently you can upgrade to a 24 or 48 hour option. Delivery times to remote locations & non mainland uk addresses may be extended & an additional payment may be required, unfortunately we can not ship larger items to the channel islands. Silco sports payment please make payment as soon as possible in order for timely dispatch of your goods. Silco sports returns & resolutions we offer a 30 day money back guarantee. If you are not completely satisfied with your item just return the item back to us within 30 days of receipt, in its original condition & packaging with all original parts. When sending a return please ensure you include your full name & address & order number in order for us to process your refund quickly. Once the item has been received back & inspected, a full refund for the item will be issued. If the item you received is not what you originally ordered, please email us quoting your order number, name & details of the product & we will get back to you within 24 hours to resolve the problem. If happy with your purchase please leave positive feedback. If unhappy please contact us & we will do our utmost to resolve the problem.