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+--- Thread: A Fighting Carbine (/showthread.php?tid=13309)
A Fighting Carbine - biodsl - 04-30-2017
After many years Ive finally got around to building a Grendel carbine. This is not a hunting rig, though you could use it for that. No, I wanted to configure something for fighting. We often have conversations on this forum regarding the Grendel as a replacement for the 5.56. This is my interpretation of that weapon. The philosophy of use is similar to the M4. I didnt build this as a DMR. For that role Id likely choose a different barrel.
This rifle is built around three primary components; the barrel, BCG and optic. The barrel was Nitride finished by Precision Firearms. The bolt carrier group is also one of Marks nitride units. The scope is a SWFA SS 1-6 HD.
As Vascar mentioned in another thread recently, choosing an optic can be difficult. This is especially true for the Grendel. The cartridge is so capable that its challenging to find one scope that can exploit everything it has to offer. I was looking for something in the 1-6 or 1-8 range that didnt involve a reticle designed specifically for the 5.56. I was looking for something that would work across the room but would allow for accurate fire out to 600 yards or so. This scope weighs a ton (22 ounces and almost two pounds with the La Rue mount) but hopefully brings a lot of capability and durability to the game. I may swap the mount for one of my Nightforce Ultralites that are pulling duty on other rifles right now. That would save a quarter of a pound.
Lower; 2.6 lbs
Receiver; PSA Blem
Stock; Magpul ACS-L
Grip; Magpul MOE
Trigger; CMC 3.5 lb curved
Buffer system; JP Silent Capture Spring
Safety; mil-spec
Upper; 4.1 lbs
Receiver; Precision Firearms Forged
Barrel; AA 16 lite, nitride finish by Precision Firearms
Muzzle device; AA A2 style
Handguard; MI SS Gen 2 (perhaps to be replaced by a longer ALG M-Lok)
BCG; PF Nitride
Gas Block; YHM low pro, non-adjustable
Optic; 1.9 lbs
Scope; SWFA SS 1-6x24 HD
Mount; La Rue LT158 10 moa cant
A Fighting Carbine - Kilco - 05-01-2017
Love the build! Lots of high quality parts as well! What ammo do you plan on feeding it? Hoping you put it through its paces and report back.
A Fighting Carbine - ricsmall - 05-01-2017
Great looking blaster bio. Keep us posted on range results, as I've been contemplating building the same type setup around that very barrel.
Richard
A Fighting Carbine - biodsl - 05-01-2017
Kilco Wrote:Love the build! Lots of high quality parts as well! What ammo do you plan on feeding it? Hoping you put it through its paces and report back.
Ammo will vary a little; some Wolf SC, Hornady Black and reloads. My standard recipe has been 31.2 grains of CFE over a 123gr Amax in both Hornady and Lapua brass. After sighting it in I managed a prone 3 shot, 2" group at 200 yards (the target is so tiny for my 50 year old eyes with only 6x!). I should probably wait for any real accuracy testing til I get another hundred or so rounds down the pipe.
A Fighting Carbine - VASCAR2 - 05-01-2017
Great looking rifle biodsl! I did a test shooting CQB drills using a timer comparing the 5.56 to 6.5 Grendel. The 6.5 Grendel may not be as fast as a tricked out 3 gun 5.56 where hundreths of a second matter but in a real CQB encounter I would not hesitate to use a 6.5 Grendel.
A Fighting Carbine - 65Whelen - 05-01-2017
Nice build, well thought out. Your build list is all top notch and giving your rational for components used is very informative. Great build report, thanks.
A Fighting Carbine - danm - 05-01-2017
That's a good concept build, only thing I might do different would be a pinned 14.5" barrel.
A Fighting Carbine - biodsl - 05-02-2017
danm Wrote:That's a good concept build, only thing I might do different would be a pinned 14.5" barrel.
I don't disagree with that. Were it not for those messed up NFA laws, I would probably have gone that route. Doing a 16" was just easier. Does that make me lazy? :confused:
A Fighting Carbine - stanc - 05-02-2017
biodsl Wrote:I don't disagree with that. Were it not for those messed up NFA laws, I would probably have gone that route. Doing a 16" was just easier. Does that make me lazy? :confused:Either lazy or smart, I'm not sure which.
I wish I could have something like that.
A Fighting Carbine - jonny rotton - 05-02-2017
VASCAR2 Wrote:Great looking rifle biodsl! I did a test shooting CQB drills using a timer comparing the 5.56 to 6.5 Grendel. The 6.5 Grendel may not be as fast as a tricked out 3 gun 5.56 where hundreths of a second matter but in a real CQB encounter I would not hesitate to use a 6.5 Grendel.
my times in cqb drills with my 16" 6.5g with a true 1x-6x vx6. are almost as fast as any of my fastest times with any of my rifles. i would not hesitate to use it for an all around fighting weapon
A Fighting Carbine - Beerswimmer - 05-02-2017
Looks good, except I'd hate to have to be in a firefight with a/that bipod.
A Fighting Carbine - Kilco - 05-02-2017
Beerswimmer Wrote:Looks good, except I'd hate to have to be in a firefight with a/that bipod.
The Mk 12 uses a Harris bipod I believe..