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+--- Thread: My ongoing 12.5" Grendel build (/showthread.php?tid=8874)
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My ongoing 12.5" Grendel build - PigOPs - 01-12-2015
Well my 14.5" CLGS Sabre Defence barrel has been measured to make sure the throat is right and is now on it's way to ADCO to be cut down to 12.5". I will hopefully receive it back in the next couple weeks and will be able to assemble.
Specs:
SBR lower
-12.5" Sabre barrel as described above (maxim bolt)
-Anderson lightweight upper (no forward assist or dust cover; will be lapped to insure square)
-CMMG RKM 11" handguard
-Seekins adjustable gas block
-AAC 51t blackout FH (have Saker 762 in stamp jail)
I'll take pics after assembly but I'm hoping with suppressor attached this gun will be about the same footprint/weight as my 18"
My ongoing 12.5" Grendel build - jurassic - 01-13-2015
How did you measure the throat?
My ongoing 12.5" Grendel build - PigOPs - 01-13-2015
With a hornady oal gauge. 123sst hit at 2.275" which should be perfect. My 120 Accupoints can be seated even further. I also visually inspect it as best as I can. I am of the opinion that tx got a lemon when these barrels are typically known for being nice. My mlgs Sabre barrel was real nice.
My ongoing 12.5" Grendel build - lead chucker - 01-13-2015
Great! Can't wait to see it and how it performs!
My ongoing 12.5" Grendel build - am4966 - 01-13-2015
What optic are you putting on it?
My ongoing 12.5" Grendel build - PigOPs - 01-13-2015
A vortex viper 3-9 in an Aero lightweight mount.
My ongoing 12.5" Grendel build - 65Whelen - 01-13-2015
PigOPs Wrote:With a hornady oal gauge. 123sst hit at 2.275" which should be perfect. My 120 Accupoints can be seated even further. I also visually inspect it as best as I can. I am of the opinion that tx got a lemon when these barrels are typically known for being nice. My mlgs Sabre barrel was real nice.
I picked-up Sabre 14.5 barrels, unfortunately I got one of the lemons. With the Hornady OAL gauge, the 123SST hit at 2.230 but with the 129SST I'm getting 2.280. Go figure? I was planning on using the 129s anyway, so I'll still be able to make a lot of lemonaid.
Looking forward to pics of your build, sound very interesting.
My ongoing 12.5" Grendel build - jurassic - 01-13-2015
Very interested to see how your project performs! A CL Grendel barrel should last forever.
My ongoing 12.5" Grendel build - PigOPs - 01-21-2015
UPDATE: Received my shipping notification this morning on the barrel. Should have everything I need at this point. I was pleasantly surprised that the receiver face was square and didn't require lapping. I plan on bedding the barrel with blue loctite and am really hoping I can find a 1 MOA or better handload. I know it's a chrome-lined barrel but my last one was pretty accurate.
My ongoing 12.5" Grendel build - PigOPs - 01-27-2015
![[Image: 16172934869_31f065ba01_c.jpg]](https://farm9.staticflickr.com/8614/16172934869_31f065ba01_c.jpg)
Here she is.. got her running like a top and grouping pretty good with handloads. I'm taking it out tonight on a pig hunt so hopefully I'll draw some blood. We shall see!
My ongoing 12.5" Grendel build - VASCAR2 - 01-27-2015
Looks great, give us an after action report.
My ongoing 12.5" Grendel build - Variable - 01-27-2015
Ditto! Looks svelte!
My ongoing 12.5" Grendel build - 65Whelen - 01-27-2015
That's a cool build, thanks for sharing.
My ongoing 12.5" Grendel build - am4966 - 01-27-2015
I'm building a 12.5" Grendel too and Im putting 11" rail on it. So I'm really loving your build! What buffer system are you using?
My ongoing 12.5" Grendel build - PigOPs - 01-27-2015
I was using a standard carbine but because of some gas issues and almost having to completely close my gas port on my agb, I switched to a spikes t2 to slow things down a bit.
My ongoing 12.5" Grendel build - BluntForceTrauma - 01-27-2015
Very cool. If you have any time to waste tonight, can you do some muzzle flash testing with that flash hider? I assume it's the AAC?
My ongoing 12.5" Grendel build - PigOPs - 01-27-2015
It is. I will see what I can do.
My ongoing 12.5" Grendel build - PigOPs - 01-30-2015
Here my first (and only) 5 shot group with factory SST. The lower left was a called flyer. My heart was beating hard cause I was excited and should've calmed myself more. What I am most excited about is I should be able to find a handload that's even tighter. Not bad for a chrome-lined barrel that I paid $200 for (after chopping down). This gun puts a smile on my face every time I pull the trigger...
![[Image: 16216226848_eaf4c5a0a6_c.jpg]](https://farm8.staticflickr.com/7349/16216226848_eaf4c5a0a6_c.jpg)
My ongoing 12.5" Grendel build - 65Whelen - 01-30-2015
Man that's sweet, I've got one of those barrels too, hope it shoots half as good as that.
My ongoing 12.5" Grendel build - m796rider - 01-30-2015
PigOPs Wrote:
Here she is.. got her running like a top and grouping pretty good with handloads. I'm taking it out tonight on a pig hunt so hopefully I'll draw some blood. We shall see!
That is a VERY nice, clean-looking rifle.