FMA Ops-Core FAST Military Helmet (Black) Laser Units simply attach a push-on stock

simply attach a push-on stock tube and tighten its mounting screw inside the tube

revealing the CO2 cartridge compartment

See the workpad in use in the video below

A fully retractable stock allows you to make the MP7 much shorter in just a matter of seconds

FMA Ops-Core FAST Military Helmet (Black) Laser Units simply attach a push-on stockThis helmet from FMA is a fantastic replica of the Ops Core FAST Base Jump Military Helmet. Features an under the chin sports style chinstrap with a cover sock for added comfort. Lightweight, multi impact, ventilated liner with repositionable EPP impact pads and LDV closed cell comfort foam. 1 2" EPP pads come with the helmet Occ Dial adjustable fitband with replaceable leather front, nape, and side pads for comfort and stability FAST ARCs 4 Position