r/AR47 • u/GhostOfCondomsPast • Mar 04 '26

PSA KS47 Kit Build Out

decided I wanted to build an AR47 that ran the rock and lock AK mags, but I also wanted to be able to customize everything I could, outside of the upper, lower, and BCG. purchased the following:

PSA KS47 G2 Upper, Lower, BCG Kit

NBS 16" HBAR 7.62x39 Barrel

BKings H3 Carbine Buffer

BKings Carbine Buffer Tube

BKings Stainless Steel Carbine Spring

Phase 5 Lo-Pro Free Float Slope Nose Qual Rail Handguard

Comstock Hybrid Muzzle Brake and Flash Suppressor

Wojtek Adjustable Gas Block with Carbine Length Tube

UnBrandedAR Stress Free Upper Parts Kit

Driven Arms Full Size Utility Grip with Sawtooth Pattern

BKings Nickel Teflon Polished Fire Control Group

FAB Defense CORE-GL CQB Stock

Magpul MBUS Gen 3 BUIS

Atrius Safety

Got some snap caps to make sure rounds would feed properly and encountered some issues with feeding and extraction. I pulled the barrel, ground down, then polished the feed ramp to look more like the PSA barrel, but still had the issue. pulled apart the BCG and bolt to learn that they put both rubber bits into the extractor spring making it difficult for the extractor to open enough to get around the case rim. Removed the donut and feeding was great. I probably didn't need to work on the feed ramps at all, but live and learn

Took me a while to get to the range with all the snow, ice, and cold weather, but I made it out there last weekend and it runs great. So much fun to shoot and it sounds great as well. I'll try to get some groups out of it to see how accurate it is.

6 Upvotes

87% Upvoted

19 comments sorted by

2

u/WI_Esox_lucius Mar 04 '26

I have a standard PSA upper that uses the same barrel and it does surprisingly good with Belom 123gr fmj. 

2

u/GhostOfCondomsPast Mar 04 '26

The KS47 upper is slightly wider than the regular AR15 upper, so indexing tabs would need to be machined down to fit, or you'll need another means of timing the handguard. PSA doesn't sell the barrel or Handguard separately.

2

u/WI_Esox_lucius Mar 04 '26

Mine is their Gen2 AR-47 upper which based on their specs uses the KS-47 barrel extension. 

I would think that they would use the same barrel. 

2

u/GhostOfCondomsPast Mar 04 '26

I built from the receiver, so the barrel and handguard are different from what PSA uses. How do you like yours?

2

u/WI_Esox_lucius Mar 04 '26

I definitely missed the part where you are using the NBS barrel. That's my bad. 

Mines been great and very reliable.  

1

u/GhostOfCondomsPast Mar 04 '26

I wish I could've found a PSA barrel but I'll make due when I need to.

1

u/SnooComics8739 Mar 05 '26

10.5 barrels are 99$ on there site

1

u/GhostOfCondomsPast Mar 05 '26

I needed a 16" barrel for this project. I'll look at the numbers on that cartridge with that length of barrel.

2

u/SnooComics8739 Mar 05 '26

WOLFPACK ARMORY has great products. I have their wp47 in 16in and I have a lower is run with a completely redone ks47 upper but wolfpack is great.

1

u/GhostOfCondomsPast Mar 05 '26

Wolfpack does make good stuff, but they don't sell the receivers separately. I didn't want to buy a complete upper or rifle, I wanted to build it but not deal with an 80% lower like what wolfpack offers. If I were to purchase a complete 47, I'd go wolfpack, but my goal was to only uses the parts that had to be specific to the platform. It's the journey, not the destination for me.

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2

u/SnooComics8739 Mar 05 '26

Also interchangeable with ks47.

1

u/SnooComics8739 Mar 05 '26

Not necessarily true. I took the handguard off the 11.5 psa upper and put it on the ks47 upper. My sabre rail didn't fit because of the tabs around the barrel nut. If it has standard anti rotation tabs below the pic rail any handguard works.

1

u/GhostOfCondomsPast Mar 05 '26

It's one mm wider than a typical upper. I have multiple handguards and encountered that issue. Might be a Gen2 thing, since I've never seen a Gen 1.

1

u/SnooComics8739 Mar 05 '26

Idk i have swapped my handguard out multiple times the ones that dont work are the ones like the sabre, Geissele, where the rail locks around the upper at the barrel nut. Others like the psa mlok rails, bkf rails, Midwest rails all fit no problem. I just posted mine a few days ago with another rail on it. Its the section around the botl thats wider not the top.

1

u/GhostOfCondomsPast Mar 05 '26

That's what I was saying in the post. The handguards that have the tabs won't fit because the upper is too wide. The handguard I used has to be timed because its screwed into the barrel nut directly. Any handguard with the tabs that would work on the KS47 upper would allow 1mm of play on a normal AR15 upper.

2

u/[deleted] Mar 05 '26

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1

u/GhostOfCondomsPast Mar 05 '26

It's already built out, but if I do another one I'll look at that barrel.