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Ultimate Liteweight Precision Grendel Build
#49
The UPSperson commenth bearing titanium muzzle brake and behold!

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About 5.25 lbs unscoped, 6.6 as pictured. The tactical scope probably isn't going to work on it for me and I probably will go in the direction of swapping between a 1x and the 16 oz 2.5-10x32 Vortex HS LR with XLR reticle that currently resides on my 20" BHW (that will probably get a little more magnification). Next range session (hopefully tomorrow) will include dismounting and remounting (rinse and repeat) the Vortex Venom red dot on my 300 BLK and seeing if the zero holds. The sight and mount weigh in around 3.3 oz. Otherwise I might look into the Trijicon MRO on a Geissele Super Precision Mount.

Now this could easily be an under 5lb Grendel:

- The CMC LPK actually weighed in 1/2 oz lighter than estimated and I used anti walk pins instead of anti-rotation pins. Using V Seven Ultralight Mag Release, pivot pins, bolt catch and safety selector would save an ounce. So there's 1.5 oz.

- 1/2 oz with 2A Arms buffer tube; 1.5 oz with Rogers stock from Wilson Combat. If one wanted to sacrifice rear bag support, a couple more oz could be found with a CF stock.

- Substitute one of the 18" BSF Grendel barrels that Rainier is blowing out the door for $299 and there's another oz (6.5mm tube iso 5.56).

Wallah! Under 5 lbs unscoped and thoroughly capable of going the distance.

But what's thoroughly crazy is that you can get a 25.9 oz fluted 18" Grrrrrr barrel direct from BSF for 600 clams. I think those are 0.875 at the gas block which opens some lighter weight GB options. But that's 4.2 oz lighter than my 223 barrel, so adding the 3.5 oz above, it would be at about 4.75 lbs. Add the Vortex 2.5-10x32 on the Aero Ultralight mounts and it's a 6 lb 1000 yard pluser. Who knows - that may happen down the road as I have a 556 blasting carbine that's quality parts that could provide a home for this 223 barrel..........

As a side note, my guess is BSF is blowing out the grendel barrels because BSF is moving to 0.875 vs 0.936. There aren't any lightweight non CF lightweight handguard options that would allow a covered .936 AGB. The set screw GB I'm using just barely fits under the Faxon rail since, although it has a 1.7" ID, the barrel is higher on the handguards axis, so there is more room below the barrel than above. There is room for a clamp on non adjustable if I find one (along with the motivation to install a gas tube roll pin and align a new block).


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Let's go Brandon!
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Ultimate Liteweight Precision Grendel Build - by StoneHendge - 06-06-2018, 12:43 AM

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