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KAK budget build

806guns

806guns

Supporter
Supporter
Full Member
Minuteman
Nov 17, 2020
647
257
Texas
#1
Decided i needed another budget 556 build. I starred by looking at barrels from various mfg's and narrowed it down to these lengths
13.9
14.5
Or just a 18" spr contour
Kak has these barrels under oe-spec from 125-150.
Ordered the 18" and still may do a 13.9" later. Some pretty quick shipping as it's here a few days later.
I will borescope the barrel. And start assembly. I plan on using a BCM blemished upper receiver.
I may build a complete lower and build two separate uppers.
I like taking chances on these cheap barrels.
18" is 1:7 and will get fed 77gr handloads using sw match or 2520
1000009505.jpg
 
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#2
I'll be interested to see how the 18" KAK barrel shoots. I ordered one of their 12.5" mid length barrels a while back, but just got around to building up the upper last weekend. It's a thoroughly budget build, used a BCM blem upper, NBS ultralight 12" handguard and an SA AGB.

The barrel seems to be ported for unsuppressed use, and I think I'm going to DT my old Saker 762 on semi-permanently, so I'll need to mess around with buffer weights and maybe springs to get it where I want it in bleed off mode.

PXL_20240701_020217177.jpg
 
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#3
Gtscotty said:
I'll be interested to see how the 18" KAK barrel shoots. I ordered one of their 12.5" mid length barrels a while back, but just got around to building up the upper last weekend. It's a thoroughly budget build, used a BCM blem upper, NBS ultralight 12" handguard and an SA AGB.

The barrel seems to be ported for unsuppressed use, and I think I'm going to DT my old Saker 762 on semi-permanently, so I'll need to mess around with buffer weights and maybe springs to get it where I want it in bleed off mode.

View attachment 8453464
Click to expand...
Thats a pretty budget build as well. Feel free to report back here after you fire a few rounds.
 
#4
That's a stiff looking barrel !
I have always wondered how the KAK barrels shoot ... definitely interested in your results.

Could you possibly weigh it ? ( KAK doesn't show the weight of that barrel. )
And if possible , measure the gas port size ?

FWIW... my Criterion 18" RLGS has a .092" GP, And my Centurion 18" RLGS has a .101" GP.
 
Last edited:
#5
bfoosh006 said:
That's a stiff looking barrel !
I have always wondered how the KAK barrels shoot ... definitely interested in your results.

Could you possibly weigh it ? ( KAK doesn't show the weight of that barrel. )
And if possible , measure the gas port size ?

FWIW... my Criterion 18" RLGS has a .092" GP, And my Centurion 18" RLGS has a .101" GP.
Click to expand...
I don't have the proper pin gauges to measure gas port size but I can do the rest.
 
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#13
bfoosh006 said:
That's a stiff looking barrel !
I have always wondered how the KAK barrels shoot ... definitely interested in your results.

Could you possibly weigh it ? ( KAK doesn't show the weight of that barrel. )
And if possible , measure the gas port size ?

FWIW... my Criterion 18" RLGS has a .092" GP, And my Centurion 18" RLGS has a .101" GP.
Click to expand...
Weight is 3lb 2 oz
 
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#14
Not to pull off topic, but I chrono'd the KAK 12.5" yesterday when I was playing around with buffer weights and was pretty impressed with the velocity of the AAC 77gr OTM out of the short barrel. Seems like it's only ~200fps down from an 18-20".
Screenshot_20240708-081431.png


If it shoots ok with this load and the 75gr black tip or 77gr TMK, I might not bother loading for it for around the house armadillo and deer duty. BTW, an H2 settled things down nicely suppressed in bleed off mode.
 
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#17
Gtscotty said:
Not to pull off topic, but I chrono'd the KAK 12.5" yesterday when I was playing around with buffer weights and was pretty impressed with the velocity of the AAC 77gr OTM out of the short barrel. Seems like it's only ~200fps down from an 18-20".
View attachment 8454797

If it shoots ok with this load and the 75gr black tip or 77gr TMK, I might not bother loading for it for around the house armadillo and deer duty. BTW, an H2 settled things down nicely suppressed in bleed off mode.
Click to expand...
That is some stout performance with 77’s from a 12.5.” Could stretch that out quite a bit.
 
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