Umarex H&K Limited Edition MP5 A4 w/ M-LOK Shroud - Black used actually yielded worse efficiency and

actually yielded worse efficiency and a loss of up to 15 fps compared to a bolt with the proper cup seal

Installs in pistol to allow use with CO2 tank and remote line

1 TA20065 Grease Pack

Designed for runners

Umarex H&K Limited Edition MP5 A4 w/ M-LOK Shroud - Black used actually yielded worse efficiency andFeatures Realistic, durable full metal construction Fully licensed by H&K Built to take LiPo batteries for increased performance including rate of fire and trigger response Quick change spring system for easy FPS swaps Ambidextrous fire selector and magazine release controls M LOK handguard for mounting grips, lights, lasers, and other accessories Top mounted Picatinny RIS for mounting optics with M LOK extension over barrel for additional mounting