The staff here at MossbergMVP.com recently got the chance to review the LSS chassis from MDT(Modular Driven Technologies). LSS stands for Light Sniper Systems and is lower cost light weight version of the proven TAC21 chassis. MDT has been developing their tactical chassis applications for bolt action precision rifles since 2009 with a strong emphasis on utilizing AR 15 ergonomics. The LSS chassis application for the Mossberg MVP rifle is designed to accept an AR 15 collapsible butt stock and pistol grip. There is also an adapter available to mount fixed butt stocks if desired. The chassis kit doesn't include shoulder butt stock, pistol grip or magazine, offering plenty of options to customize your LSS chassis with AR 15 goodies. Here is the product description from MDT : The LSS chassis for the Mossberg MVP accepts AR-15 Magazines and installation of bolt on MIL-STN-1913 accessory mounting rails on the bottom of fore-end. Mounting holes are spaced for Magpul style L5 (11 slots) and L3 (7 slots) rails (1.600” / 3.200”). The LSS chassis is engineered to minimize warping and distortion. The rifle receiver only makes contact with the LSS chassis on the V shape bedding and recoil lug area insuring the best accuracy and repeatability. The generous clearance on the fore-end makes OEM Standard and Bull barrel free floating. MSRP: $399 For Mossberg MVP in .223 Weight: 1.7lb Designed for AR-15 collapsible butt-stocks. Uses AR-15 grips. Fits AR-15 Magazines in .223 and .308 Also available for Savage, Tikka T3 and Remington 700 Optional adapter can be purchased for fixed butt-stocks First Impressions I received the LSS chassis about 3 weeks ago coming off MDT's first production run for the MVP rifle. The chassis comes with installation instructions as well as 2 allen head action screws and a grip screw. The machining and finish of the chassis is top notch, comparable to any hi-end billet AR 15 upper or lower. The trigger guard area looks to be about 30% bigger and the magazine release button is in the same place as the AR 15. During a function test of the chassis mag release, I found that it would not retain any AR 15 type magazine. MDT uses a standard AR magazine catch and within a minute or two I swapped it out with one from a parts kit and fixed the problem. I compared the magazine catches and found the one supplied was machined incorrectly. I contacted MDT about this issue and they were aware of it affecting the first couple units of the production run and have since corrected it. Chassis Installation Once you have installed your pistol grip, buffer tube w/ castle nut, and butt stock on the LSS chassis, mounting the MVP action is a breeze. The action bedding area is rock solid and the action screw torque spec is included in the instructions. For our review we added a bipod using the sling swivel provided with the chassis. We did notice that the action screws engage the action about .030" deeper than the standard MVP stock and action screws. I think this ensures a solid bedding surface. To the Range!! The range conditions were 32 degrees with some overcast and a 5-10 MPH cross wind. Now, I have shot my MVP enough to know it would be hard to top the accuracy. To think that the LSS chassis would enhance the accuracy of the MVP might be expecting too much. If any thing I would be looking to see if the accuracy suffers from swapping the chassis. Right off the bat, we have a failure with the MVP action. We swapped the action from the second MVP rifle we had with us and continued the review. ( Action failure not related to the LSS chassis.) The first thing I noticed was the point of impact of my rifle changed once I installed the LSS chassis. I feel this is due to the superior action bedding of the LSS chassis and was easily corrected with a few elevation and windage adjustments. Within a few shots, the MVP-LSS chassis combo was grouping and I was smiling! This was a group shooting 10 rapid shots off a bipod. Final Thoughts I believe this chassis completes the MVP rifle. Mossberg has given several stock offerings for the MVP including the Varmint, Predator and Flex. None of which even compare to the ergonomics and versatility of the LSS chassis. If you are looking for a tactical chassis that ensures accuracy and incorporates AR 15 ergonomics, the MDT LSS chassis is for you.