Thinking of re-barreling my SCR?

Hit or miss.

My friend has a cut down 6.8 that shoots sub MOA.

@Calculon had some barrels that were “sub 8 inch” at 100......

Never buy a carbine ported barrel. There isn't one good single reason for doing that.
If it is 16" look for a mid length porting.
The price difference means nothing when compared to the cost of what you are going to feed through it.

nortatoga said:

Not sure I understand what you mean by ported?

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Sorry, Ported means drilled. Carbine ported saying the hole that is drilled in the barrel is in a position to take
a carbine length gas tube that is too short for this type of firearm.
the only reason we have carbine ported barrels is because of the Military style carbines that is a design mistake
because they did them shorter in order to be able to use the Grenade launcher bracket.
Then this style of barrel became popular with the civilian market because of esthetic reasons but nothing
really good comes with those M4 style barrels.

A) The port is too close. A mid length or rifle port is a lot better balanced and everything runs smoother and cooler.

B) Those slots cut in the M4 style barrels that are so popular serve no purpose and weaken the barrel. Not
an issue in the barrel above but a bull straight profile all the way to the gas port also doesn't make the barrel
much better.

C) The 1/2 threads popular in military style barrels and AR15 should have never existed. 5/8 threads is much
better as it gives more thickness between the bore and the threads in that critical area. This will potentially
avoid crown swelling over time.

In summary things to avoid:

1. Carbine ported barrels.
2. M4 style barrel profile.
3. 1/2x28 threads on the muzzle.

Also nitrocarburazation (melonite) has been proven possibly the best finishing method for 4140/4150 barrels.

Eddie Gunks said:

Hit or miss.

My friend has a cut down 6.8 that shoots sub MOA.

@Calculon had some barrels that were “sub 8 inch” at 100......

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Eddie's right. I had 2 barrels that BCA replaced due to such poor groups at 100 yards with match grade ammo. Barrels were 223 Wylde, carbine length gas, 16" with 1:8 twist. I was getting 6 to 8 inch groups at 100 yards off the bench in a lead sled. Tried 55 grain up to 79 grain. I haven't used the new ones yet so I can't say how well they shoot. As long as you don't expect the same accuracy that you'd get out of a top end barrel I'd say go for it. If plinking and hitting large plates all you have in mind no problem. If you are interested in competing (e.g. 3Gun) then look elsewhere.

Don't cheap out on barrels. Faxon and Ballistic Advantage both offer a quality, reasonably priced product.
Also, yes for a 16" a midlength gas system is the way to go.

Looks great! Give us a range report when you take it out. How’s the eye relief on that scope? Is it set way back or is it just the camera angle?

Very nice build

How do you like the handguards?

nortatoga said:

The handguard is great!!!! Plus it is M-Lok.

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M-Lok is the best lok lol, but these are the handguards I was considering for my .458socom pistol build (was just about to pull the metaphorical trigger on ordering the lower since I finally learned about a local ffl that will do the transfer, but then I got the notification for G17 frames being in stock)

Nice. I am glad you like it.
Why do you have off-set scope mounts backwards?

nortatoga said:

Your right I do have them back asswards LOL!!

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lol. it seemed a tad back and high to me.
I wonder if you would be better with a set of straight low size rings? obviously as soon as the scope clears in the front.
Either small or medium and then you might shim the comb unless it is adjustable.
Best thing is to stack a bunch of coins and with masking tape figure out the height and ergonomics before buying rings or mounts.
And try prone on the floor too as we tend to dig deeper into the comb and forward
when we shoot prone. The eye is lower.

Of course there are situations where extra long rings and ergonomics might be needed.

That is a really nice set-up Nortatoga!!!!
Robin

Bca has about the same reputation as the Clintons.


Three things to never cheap out, your bcg, barrel, and optics set up. Those are the heart of any ar type rifle.

Isnt a tad high or you have a comb raiser?
Normally you want to come down forward and put your cheek well seated against a good support. Personslly I like a neoprene wrap over the cheek rsiser.
Sorry for being a pest.

How much did you shoot the SCR in the stock configuration?

Ok so instead of starting a new thread I figured this was a decent spot to post up.

Looks like a NY shop (mentioned in a few other threads) Barton or whatever NY is thinking of doing Ported AR barrels....

Edwardteach72 said:

Ok so instead of starting a new thread I figured this was a decent spot to post up.

Looks like a NY shop (mentioned in a few other threads) Barton or whatever NY is thinking of doing Ported AR barrels....

View attachment 48804

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Most mass producing shops don't do it right and for what a 223 or a grendel?
there is no need but if you want something then do a press fit and pinned flush brake.
there is no threads so the SAFE BS does not apply.

meketrefe said:

Most mass producing shops don't do it right and for what a 223 or a grendel?
there is no need but if you want something then do a press fit and pinned flush brake.
there is no threads so the SAFE BS does not apply.

Click to expand...

I mean there are plenty of big bore options, or even the AR 10...

Also this isnt a mass produce shoe. It's like 1 dude and his shop. Or for those still shooting 3 gun, lot of 3 gun ARs with comps (granted porting wont be anything like a 3 or 5 chamber comp)