MDT LSS-RF Generation 2, Rifle Chassis, Cerakote Finish, Black, Fits CZ 457 104486-BLK In 2013" after the MDT TAC21 Chassis has been on the market for a few years and was being widely adopted" they quickly realized that there was a need for an aftermarket rifle stock that was more compact" more lightweight" and extremely easy to install. The chassis also needed to fit a carbine AR buttstock and AR grip" easing the barrier to entry for first-time chassis adopters with a spare AR buttstock or grip laying around. This was the beginning of the MDT LSS Chassis. The MDT LSS Chassis is now onto a new and improved Gen2 version" with upgrades such as a more aggressive barricade stop" M-LOK forend" and an ambidextrous magazine latch to name a few. With the addition of products like The folding stock adapter and any carbine compatible buttstock" your next compact truck gun" lightweight foldable hunting rifle" or general shooter build has never been easier.