Modular Driven Technologies LSS Chassis for Savage Model 10 & Mossberg MVP .223

Black parts sold separately.

Black parts sold separately.

I recently got one of these delivered for my Savage Model 10 (Project Gabriel). This chassis is very much like the LSS chassis on my Mossberg MVP. Other than being physically bigger in a couple directions they’re more or less identical.

The basic execution is top notch. Great machining work turned out a product that does just bolt on. The AICS style magazine well is functional and nicely snug and offers very little play to a seated magazine. The AICS magazine system has a little bit of vertical play native to the system but the mag well is otherwise properly sized to minimize wobble. The mag release lever is sprung well and offers positive retention of the mag and an easy one handed release. It does not dispose the rifle well to being fired offhand because one of the best hold locations for the non-firing hand is in front of the trigger guard which will cause you to release the mag on the AICS mag models.

On Project Rolling Stone. Mossberg MVP Varmint 24″ .223 1:9 SWFA 16×42 SS

Magazine well fitment on the MVP model isn’t quite so good. The well isn’t really as long as it could have been to provide the same support as something like an AR-15 would. GI steel mags have a little more rattle and wobble room than I’d like and at full 30rounds fill with those I’ve had lots of problems feeding sharp nosed bullets like 70gn Berger VLD. The placement of the mag release button is very ergonomically similar to an AR-15 which is nice and it works great. Polymer mags that I’ve tried fit much more snugly and didn’t always drop free. I don’t dig on plastic AR mags so I didn’t do a lot of work with them.

There is a small cutout made on the right side of the Savage chassis just above the trigger that seems like it was intended to provide a slick way for dirt and grime to fuck up the trigger. It’s actually for the bolt release access on rifles with a trigger guard mounted bolt release but there’s no reason for it to be open by default. Sigh, short sighted thinking from only one point of view while making a product for lots of them. It’s nothing to plug it and one questions why it was left open. They should at least fit a little plastic plug in it. Or, well any number of other routes wouldn’t leave that hole open. The MVP model doesn’t suffer this malady and neither do non-savage chassis.

On Project Gabriel. Savage 10FPSR 24″ .308 1:10 US Optics ST-10 TPAL 10×37

Exactly like with the MVP chassis the tail spout hangs excessively far from the point where the action ends. This pulls an extra inch or two of length of pull into the equation and makes a full length buttstock problematic for those of even normal height. Using a collapsing buttstock solves the symptom and while it seems like it might be nice and it is a useful feature to enable I think it’s misplaced for a collapsible stock to be living on a precision rifle chassis.

The fore end, exactly like on the MVP chassis, is so narrow that I know for sure that I’m going to get a hand full of hot barrel one of these days. Another success at making the stock both light and rigid and another case of taking it just a little too far. What does it cost to not cut a little aluminum off here or there? 20 rounds of .308 Winchester in rapid succession will almost certainly lead to some burns on the hand if the shooter is incautious enough to touch the barrel. As well there are lightening cuts on the fore-end which could have been made key-mod and enabled a lot of other options for accessories for the thing. These are signs that someone was solving for a specific problem and hadn’t considered the whole product line as a spectrum.

550m plinking with LSS equipped MVP Varmint

550m plinking with LSS equipped MVP Varmint

Pricing: At 400 bucks for the base chassis it’s not inexpensive when compared to other systems like XLR, McCree’s, etc… If you want light then this is a system to check out. It costs pretty unless you go cheap with the furniture.

I went with Magpul MOE furniture but I wanted the PRS. I didn’t want the $250 price tag for the PRS plus another 50 bucks for the fixed stock adapter and MDT hasn’t got their PRS copy available yet so MOE it was. With just an MOE grip ($20) and a MOE butt ($40) and a buffer tube ($20-40) and a castle nut ($5) you’re at 500 bucks with shipping. An XLR or McCree might be a better option for you at that point if you want the whole thing in a single purchase. It might just be that because you can buy the LSS a bit at a time that it works for you only because of that.

You will want a pistol grip without a beavertail on it in most cases. If you start with a beavertail it should be of the rubbery flexible type or it probably won’t work. I have a DPMS PSG-1 grip on my MVP and a Magpul MOE grip on the Savage M10 and had to cut the beavertails off of them. Then I had to trim and shape the back strap of the grip to get rid of a nasty pinch area that you end up with if you don’t and then had to fill the resulting gap with epoxy. What I get for all the effort of starting with beavertail grips is that the grips are in fact custom fitted to my hand now and a little plumper on the back strap of the grip.

I liked the LSS on my MVP so much that I went right out and bought one for my Savage Model 10 FP-SR. It actually increased the weight of that rifle a hair. It also more than doubled the magazine capacity and provided a detachable magazine system. This was a massive upgrade and saved me probably 200 bucks in cost to get DBM bottom metal and mags for a conventional stock. The best part is that it provides an unquestionably rigid mount for the action which was sitting in comparatively shitty factory tupperware that didn’t even have bedding pillars.

It’s a 500-infinity dollar stock when you’re done setting it up. Despite the few issues I have with the design it’s still one of the best things going in this space. On the upside I have collapsing stocks, free floating heavy barrels, V-block bedding and big magazines on 2 of my precision rifles and they look pretty tacti-cool. AICS mags are not inexpensive. Good metal ones are about 80 bucks. They’ll accept pretty long COAL ammunition which is wonderful for those of us that shoot VLD’s.

If I had it to do over again I might have gone with a different chassis for the Savage but the MVP really works well with the LSS chassis and I don’t think I’d get any benefit from any other design.



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