HOT- CZ 457 Builds - MDT- IBI - Spearhead
- Thread starter Tesro Inc
- Start date
This will depend on the chassis. In my MDT ACC Premier Gen2 with a L3i 1.180" 24" barrel, I still needed added weights out front to achieve proper PRS-level balance where the rifle would sit on a bag without tipping over. So, given the CZ barrel is smaller diameter, the extra 4" will help but you'll still need additional weights to achieve the same balance. If you're using a MDT XRS chassis, it's even more tail heavy so expect to add even more weight.
You will get roughly extra 300-350 grams over the 20" so around 3/4 of a pound. Depends on how much extra weight you are looking for as mentioned above it might or might not mitigate the need for extra. XRS chassis is not super heavy, but we do upgrade the basic XRS with the enclosed forfend for our builds, so that adds both weight and options to add more.
The enclosed forend would help for sure, especially if loaded with weights on the additional M-LOK slots.
This was my MDT XRS MTR setup. Side weights were 1 lb 13 oz and it still wouldn't balance. I hung a 4lb fishing weight out front just to see what it would take to get proper PRS balance.
This was my MDT XRS MTR setup. Side weights were 1 lb 13 oz and it still wouldn't balance. I hung a 4lb fishing weight out front just to see what it would take to get proper PRS balance.
Dang that’s a lot more weight out front than I expected, I’d heard 4lbs was necessary. That has to be north of 6lbs with the extra weight of the Arca and that cannonball is way out front giving way more leverage to that weight. Out of curiosity what does it balance like with a shorter bag with less contacting surface? That bag is supporting so far forward it’s cancelling out most of the external mlock weights you added.
I have the enclosed forend and MDT internal weight (1lb) coming because I wanted to add a full length Arca that went all the way back to the barricade stop so I could run a area 419 bag stop to negotiate the bag pushing on the mag and causing feeding issues with my 457
I also have a couple pairs of the little mdt 7oz mlok weights (1.75lbs) so that would get me up to 2.75lbs plus whatever couple oz the NV hood adds so close to 3, I was hoping by the time my bipod was hanging off it I’d be close and have a idea of how heavy of a Arca weight I needed to compensate for rounds where the bipod is removed.
**Edited to add**
I know it’s not a ton of weight but it looks like you’ve also added some LOP spacers so you do also have some positive weight way out back.
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Bustercluck
CGN Regular
- Location
- Fort McMurray
I saw this on your website and was wondering if this is still true for the latest generation of ndr magazines? The ndr website says they fit any extended mag latches and magwells?
Bustercluck
CGN Regular
- Location
- Fort McMurray
I agree. I was trying to get into this without spending a ton of cash, but the xrs needs a bunch of upgrades to be worthy. It’s a nice stock, but after the smoke clears I could’ve had a gen2 acc for a couple hundred more.
We found the same thing. Once ACC Gen2 was released, it really did not make much sense to go with upgrading XRS to almost get there for people looking for everything that ACC has to offer. That being said, not everyone cares or needs everything that ACC has to offer. However our ACC gen 2 based builds have been more popular lately. That Charcoal Green colour is lot better looking than on the pictures.
