A firearms training simulator provides recoil simulating the recoil of a conventional firearm. The valve assembly provides consistent rearward gas pressure for generating recoil. Preferred embodiments of the firearms training simulator may include a means for adjusting the amount of recoil provided....http://www.google.fr/patents/US7581954?utm_source=gb-gplus-shareBrevet US7581954 - Firearms training simulator simulating the recoil of a conventional firearm
Firearms training simulator simulating the recoil of a conventional firearm
