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Borrego Bob

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The purpose of this build was to get my daughter set up with a light weight hunting rifle. I wanted it light enough so she could shoulder it and it still be accurate. It needed to be 100% American made so i went with Leupold as my scope option (i know the glass is imported). I wanted it to be camo as it needed the hunting rifle "look". It needed to be affordable nothing on the rifle is what i call "vanity" parts. Everything was thought out for budget and quality. I don't like "cheap" parts i like a good blend of value and quality. To much quality and i can't afford it to cheap and i'll end up paying more to replace it. I bought the 18in barrel from Frank Sabatano at Maxim Firearms its a Satern Grendel II which is a good no drama hunting barrel. Buying it through him allowed him to time the threads for one of his brakes so no need for a crush washer. He also cerkoted it matte black. 

The longer Grendel II throat means i can get better performance from most hunting bullets with a forward ogive (120gr TSX, 125 Partition, 120gr, Sierra pro hunter, 120gr Nos BT etc). The shorter SAAMI throats force these hunting bullets to deep in the case giving up to much room for powder. The trade off is that sleeker target bullets like the 123gr lapua scenar, 123gr Amax need a longer jump. Good powders like 8208 XBR and AR COmp are a big help for bullets like this and 1/2 groups are still easily obtainable. Even with the longer jump 3/4in groups are reported with 123gr SST Hornady factory loads with some getting as little as 1/4in groups. No perfect solution exists pick a short throat and get better results with sleeker bullets with a larger variety of powders but loose performance with hunting bullets due to case capacity loss. Pick a longer throat which allows the bullet to be seated longer to a more natural position and get better results with hunting bullets but then pick your powder wisely with the sleeker target bullets. The Satern button rifle "Liberty" barrels have a 1/8 twist allowing for the stabalization of longer bullets like the 120gr TTSX which is very important for me being in California and a lead hunting ban looming in 2019 which is coming quick. I went with fluting because as i said weight was a big consideration. 

For a hand guard i went with Obsidian Firearms a shop that has light weight hand guards very similar to Midwest Industries for $120. So similar that they require a Midwest Industries wrench to install the guard. Quality is excellent maybe better than midwest industries itself. They made an improvement to the clamping mechanism prevent damage from over tightening. Like the midwest industries guard the guard locks tightly into the barrel nut. If you get one make sure you get a midwest industries barrel nut wrench. 

For a lower i went with Anderson because although the price is low the quality is still good. Upper was a Anderson blem. I lapped the upper just to be sure it was good. I also bedded the barrel to the upper with loctite 620 the green heat tolerate option. bedding the barrel ensures a larger barring surface and therefore theoretically better accuracy. yeah i drank the coolaid on that one. 

20151224_131238.jpg 

I used a Maxim bolt and carrier group for this build. Maxim makes excellent bolts probably the best for the Grendel.

For a scope mount i went with Midwayusa's AR Stoner mount for 50 bucks its 5oz and locks the scope in tight. The normal list price is $65 bucks but they go on sale frequently for 50 bucks. 

For a camo dip i went with Jon's camo dipping i sent him the parts and just bought the Anderson lower from him so i didn't need to send it to him. The pattern is True Timber HTC which is a great camo pattern for a variety of woodland hunting forests. From hardwood to conifers. Jon has excellent prices and a quick turn around.

20160318_183458.jpg 

The trigger is a Delton enhanced two stage trigger. it feels awesome and is around 99 bucks. It breaks clean and has a 3.5lb trigger pull. 

The scope is a Leupold AR Mod 1 3-9X40 as this is not meant as a long range target rifle but a medium out to 400 yard deer rifle and SHTF applications as well. The Leupold AR mod 1's are a great scope for the money and i keep going back to them i have 5 on my AR's right now. Its light weight as well don't forget to to check a scopes weight. What may seen like a bargain isn't one when you look at the weight of a scope. leupolds are the leading hunting scope for a reason quality, price, clearity and weight. Not just clarity and price. 

The brake is a Maxim Firearms brake designed to limit muzzle lift which is the main concern with a low recoil semi auto rifle like the Grendel. It allows quicker target requisition without the increased noise of many brakes. As i mentioned Frank timed the brake so no need for a crush washer. You have to all Frank to order the brake 928-486-2296. To many shooters are slapping on brakes designed for heavy recoil rifles that are to heavy and to freaking loud. Shooters read reviews of brakes online for brakes tested with heavy recoil rifles and assume the lessons learned transfer to a light recoil rifle. They end up with some massive heavy tank brake on a Grendel. its not needed the Maxim brake is designed perfectly for the problem. 

20160508_185802_001[1].jpg 

I went with the Magpul fixed carbine stock because its for a teen girl with weight considerations and didn't want the clanking noisy carbine collapsible stocks. Its a bargin price and fit my needs for the build perfectly. 

Over all weight as seen in the picture is 8lbs fully scoped and empty magazine so i achieved my weight goals. 

[image] 

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“What’s the secret of success? Right decisions. How do you make right decisions? Experience. How do you get experience? Wrong decisions.” – John Wayne

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Bmartens

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Reply with quote  #2 
You did a good job. Let us know how it shoots.
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Borrego Bob

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Reply with quote  #3 
Headed out on Saturday.  
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“What’s the secret of success? Right decisions. How do you make right decisions? Experience. How do you get experience? Wrong decisions.” – John Wayne

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catorres1

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Reply with quote  #4 
I am working on a similar project right now with Frank as well.  I went a different way with the barrel, due to the fact that this rifle has to wear a lot of somewhat particular hats. 

But like you, I have tried to pour in the money only where it was necessary, so I am also using Anderson upper and lower, my son picked out the Mlok version of the UTG Pro's, but wanted the full 17" version, so we did that. 

We changed up the plans on the barrel at the last moment, so we are scrambling to get this done before his birthday.  My son knows he is getting an upper at some point, but thinks at this point it is off in the future a bit and that he will have to pay for it. 

I am hoping to have it together by the 22nd of this month to give to him.  The delay has been my fault, but Frank is an amazing guy and is working to make it happen.

We used a MOE stock, but I don't like how it rattles, so may swap that for something different.  Also thinking of going with an H2 buffer.

Only doing an A2 flash hider.  I would like a muzzle break, but my experience with them is totally negative, just soooo loud and obnoxious, so I passed on that.  Interested to see how quiet yours is.

I just got the trigger ordered for him today, so I'll put that in later, it does not need to be in by his birthday, he can shoot milspec until I get around to it.

Optics wise, really not sure, that one is stumping me.  He needs something to gather light as we use it for pig/coyote hunting at night with lights.  We will also do some tactical carbine classes.  And then there is the precision rifle courses.  And of course, weight is always an issue.  So it's complex and will probably require a cowitness solution.

Anyway, really interested to see how yours does, hope your daughter really enjoys it.

I told Frank, if my son does not get enough use out of it, I will gladly be taking possession of it.  I don't have a Grendel, or an AR for that matter, but when out this weekend with my older son with his AR and 270, I realized just how absolutely perfect the grendel is for that kind of work. 



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Borrego Bob

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Reply with quote  #5 
Quote:
Originally Posted by catorres1
I am working on a similar project right now with Frank as well.  I went a different way with the barrel, due to the fact that this rifle has to wear a lot of somewhat particular hats. 

But like you, I have tried to pour in the money only where it was necessary, so I am also using Anderson upper and lower, my son picked out the Mlok version of the UTG Pro's, but wanted the full 17" version, so we did that. 

We changed up the plans on the barrel at the last moment, so we are scrambling to get this done before his birthday.  My son knows he is getting an upper at some point, but thinks at this point it is off in the future a bit and that he will have to pay for it. 

I am hoping to have it together by the 22nd of this month to give to him.  The delay has been my fault, but Frank is an amazing guy and is working to make it happen.

We used a MOE stock, but I don't like how it rattles, so may swap that for something different.  Also thinking of going with an H2 buffer.

Only doing an A2 flash hider.  I would like a muzzle break, but my experience with them is totally negative, just soooo loud and obnoxious, so I passed on that.  Interested to see how quiet yours is.

I just got the trigger ordered for him today, so I'll put that in later, it does not need to be in by his birthday, he can shoot milspec until I get around to it.

Optics wise, really not sure, that one is stumping me.  He needs something to gather light as we use it for pig/coyote hunting at night with lights.  We will also do some tactical carbine classes.  And then there is the precision rifle courses.  And of course, weight is always an issue.  So it's complex and will probably require a cowitness solution.

Anyway, really interested to see how yours does, hope your daughter really enjoys it.

I told Frank, if my son does not get enough use out of it, I will gladly be taking possession of it.  I don't have a Grendel, or an AR for that matter, but when out this weekend with my older son with his AR and 270, I realized just how absolutely perfect the grendel is for that kind of work. 





Look at Leupold and also the Cabelas Euro house brand they are supposed to be excellent assembled in the USA with Czech glass. Excellent light gathering.   

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“What’s the secret of success? Right decisions. How do you make right decisions? Experience. How do you get experience? Wrong decisions.” – John Wayne

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catorres1

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Reply with quote  #6 
Yeah, I was on the phone with Leupold last night going over options.  Unfortunately, only the "Mark" stuff has any zero stop option, and because we are doing precision rifle classes out to 1k, using dialing, we need a zero stop.  And as you can image, the Mark stuff is way pricey. 

I will check into the Cabelas stuff.  I know their Euro scope is a Meopta, in fact it is the same scope Zeiss was selling as the original Conquest. 

I need to see if they have a Zero stop, but also the amount of adjustment.  According to JBM, we'll need better than 50 MOA to make it.  With a 20 MOA base, that is still 30 MOA, and that assumes none is needed to give us a 100 yard zero, which s unlikely.  Unless I go to a 30 MOA base, which presents it's own potential problems, I think I am going to need at least 80 MOA in total adjustment, and that is maxing out the scope.  90 at least is preferred.

So not sure how I am going to pull this off, unless we use a combination of dialing and an MOA reticle for holdover, but I'd prefer a full dialing solution if possible.

The VX3i, 30 mm 4.5-14 has, I think 110 MOA.  But no zero stop, and one cannot be installed according to the tech, so it's not a good solution.

Vortex was a consideration, and I have an HST.  But they are very noticeably soft on the top end, so not sure that's a good solution, and I don't think there is enough adjustment anyway.

So lots of challenges.  But that is the fun of the build, I guess.  Solved the barrel question, solved the trigger question.  Now on to optics!

Anyway, really interested to hear your range results!

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ed308

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Reply with quote  #7 
Nice write up. I just picked up that same scope with the FireDot for my 270AR. Excellent quality.
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sniper20

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Reply with quote  #8 
Sounds like a good build. The only suggestion I would make would be a SureFire ProComp brake. I put one on my rifle (granted it's a 24" bbl), but the noise isn't any louder than without, and the weight is pretty miniscule. However, the effects are great! My recoil was cut in half, along with the muzzle jump. I can now watch my rounds hit at 100 yards with a 6 power scope, shooting from the hood of the truck (did this year with dear season). I plan on doing a light weight build, and was thinking about a hydro dip, but I think I wanna do something more like a cerakote, as I run through the woods a lot... I plan on doing that myself, so I need the setup when that becomes available... so many things to do and so little time.
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