UMAREX HK53 GBBR (BY VFC)

Fully Licensed by Umarex (Elite Force) & H&K World's First Gas Blowback HK53 Airsoft Replica - Literally a 556 Caliber MP5 Classic Lower with Unique 0, 1, and 25 Markings New Design Bolt Set for Enhanced Performance New Empty Magazine Fire Stop Function Stamped Steel Receiver Heavy Recoil Buffer and Recoil Springs Installed Retractable Stock Most External Accessories Compatible with Umarex (Elite Force) MP5A5 Gen 2 (By VFC) Will Only Work With Umarex (Elite Force) HK53 & HK33 Gas Magazines Asia Edition with Realistic Markings With No Need for EU "F" & 6mm Markings HK53 Part Diagram This product is only compatible with gas designed specifically for Airsoft guns. Do not use lighter fluid or butane gas, as that will cause permanent damage.