MRA renegade and Spectre ballistics builds

IMR4320 said:
So while I don't feel like adding another caliber into my house as I have enough already, I'm looking at the MRA with great interest, mainly due to the modularity and 26"+ length to preserve non-res status and therefore its versatility. So my question is, what kind of accuracy can you get out of this thing ?
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Depends on your barrel, really. There is no reason the MRA or LPC can't be as accurate as an AR can be.
 
my defective Odin 6.5G barrel, while pressuring out 200fps slower than a properly chambered barrel, shot several 3rd groups in the 0.35-0.50" range @ 100m during OCW testing. I never got to the point of seating depth testing, but the damn thing shot quite well. if it didn't have a defective chamber, I think it could have been a consistent 0.5-0.6 moa (5rd groups) rifle after tuning.
my 224 Valkryie is showing promise as well. OCW testing shows a good node just over 2900fps with 80.5 Bergers, with single digit ES and similar POI in consecutive groups. Group sizes at that node were 0.6-0.65" at 100m, which I think I can tighten up with some seating depth tuning.

FWIW, you can get 6.5G barrels from Maple Ridge that aren't drilled for a gas port. I ordered a 5R grendel barrel from them last week, to replace the POS Odin, and Scott called to ask if I wanted the barrel drilled for a gas port. undrilled grendel barrels aren't on their website, but if you call them they might be able to make it happen.

on a side note, I may have a Renegade set on route. the smart part of me is urging me to buy a boring 223 or x39 barrel, but the fun part of me wonders if anyone has built a 358 Yeti? Do any smiths/barrel makers north of the border have reamers or dies for the Yeti? with all the rumours of everything AR being confiscated at the border, I'd rather not look to the south.
 
Unholysavage said:
my defective Odin 6.5G barrel, while pressuring out 200fps slower than a properly chambered barrel, shot several 3rd groups in the 0.35-0.50" range @ 100m during OCW testing. I never got to the point of seating depth testing, but the damn thing shot quite well. if it didn't have a defective chamber, I think it could have been a consistent 0.5-0.6 moa (5rd groups) rifle after tuning.
my 224 Valkryie is showing promise as well. OCW testing shows a good node just over 2900fps with 80.5 Bergers, with single digit ES and similar POI in consecutive groups. Group sizes at that node were 0.6-0.65" at 100m, which I think I can tighten up with some seating depth tuning.

FWIW, you can get 6.5G barrels from Maple Ridge that aren't drilled for a gas port. I ordered a 5R grendel barrel from them last week, to replace the POS Odin, and Scott called to ask if I wanted the barrel drilled for a gas port. undrilled grendel barrels aren't on their website, but if you call them they might be able to make it happen.

on a side note, I may have a Renegade set on route. the smart part of me is urging me to buy a boring 223 or x39 barrel, but the fun part of me wonders if anyone has built a 358 Yeti? Do any smiths/barrel makers north of the border have reamers or dies for the Yeti? with all the rumours of everything AR being confiscated at the border, I'd rather not look to the south.
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This has an MRA non drilled out 6.5G barrel.

0782772-B-1-BD3-4-C03-96-C3-2531-A4-F2047-D.jpg
 
tiriaq said:
That would mean that there is no published FRT number for the rifle. Remember that there are different versions of the Firearms Reference Table.

Over the years, FRT numbers have appeared, disappeared and reappeared.
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Does the manufacturer typically not know about an FRT number assigned to their guns (in this case, a receiver set) published or non published?
 
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You can rest assured that the good folks who manage the FRT program are well aware of the SBI and MR designs, and have catalogued them, creating a FRT entry for the designs. Remember, the FRT is a catalogue, and the intent is to catalogue literally every firearm identified.
This is not the same thing as making the data public. Because a FRT entry will likely include the classification of a firearm, the entry may not be made public until the CFP decides to do so.
 
thegrandpoohbah said:
I'm kind of annoyed. The Maverick gets an "Integrated Mechanical Bolt Catch" but the Renegade doesn't.
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Natural evolution based on knowledge from the Renegade. I wouldn't be surprised if a Renegade Gen 2 appears with this feature, along with others.
 
Are the bolt knobs suppose to be a bit loose ? A friends is a little wiggly. His is an MRA.
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No.

Make sure he cleaned out the little threaded hole in the bolt carrier before putting on the charging handle.
(Mine had a bunch of gunk in it.)

It should tighten down without any wobble.
 
So... any one done a head space check ? A friend is curious to know where the end of the bolt carrier should sit with the go gauge. (On an AR it sits flush with the end of the upper receiver). Also, does the bolt need to be stripped for the test ? Its a MRA.
 
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limit time said:
Are the bolt knobs suppose to be a bit loose ? A friends is a little wiggly. His is an MRA.
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You can quickly resolve this by dropping in a thin washer in the charging handle before dropping in the Allen head screw. It'll take up just a little of the screw length and will tighten down without any play. I've done it on three builds so far and all have worked out perfectly.
 
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