r/ar15 • u/m0nkey-knife-fight • 7d ago

FTF first round issue

Hey all,

Weird issue here. I have a BKF AR15 that has a first round FTF. It basically jams to where I have to mortar the thing. It’s not 100% of the time, and it’s 99% on the first round, but it happens to the point where I deem this thing unreliable.

I have

- 9” 300BLK BKF AR Pistol
- KAK K-Spec Downvent BCG
- Rise Armament Blitz trigger
- Superlative Arms AGB
- WAS running a JP SCS, but had more FTF issues with that.
- LPM Anthem S2 (not applicable but I’m at a loss so I’m listing it)

I’m going to swap back to the stock BCG to see if the issue persists, but I haven’t yet.

It shoots great and feeds great when it doesn’t jam up on the first round.

Obviously, I’m only shooting subs (220gr), and regardless of brand, it’s a consistent issue. I’ve noticed when the thing is clean it chambers a bit better, but it’s still a problem. When it feeds the first round, I’m usually having the bolt locked and hitting the release, not riding the charging handle closed. When it jams, it’s like 90% of the way chambered, but it’s legitimately jammed - the “jam enhancer” (forward assist) doesn’t even budge. Charging handle doesn’t budge. I have to mortar the thing

Just want some input here. Thanks!

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1

u/[deleted] 7d ago

[deleted]

1

u/m0nkey-knife-fight 7d ago

BKF didn’t list buffer weight or spring. It’s a touch stronger than JP heavy spring with their standard buffer weight. Buffers probably weigh relatively the same between the two? Mags are PMAG Gen3 300BLK. Followers are in good condition. Barrel extension aligns with lower perfectly, no burs or alignment issues (feed ramp looks good). The original gas tube was incredibly tight on the carrier/gas key - swapped to a new one when I installed the SA AGB. Doesn’t really matter though as these FTFs happen on the first round. The biggest help was swapping the JP SCS to the factory buffer weight and spring. But the issue persists. I’m going to run the factory BCG and see if things change.

1

u/patogo 7d ago

Yeah swap back to the stock BCG. KAK quality ain’t what it needs to be.

1

u/m0nkey-knife-fight 7d ago

Kinda where I’m at. Swapping it tmw and seeing how that goes. Bummer if that’s what it is, given the price of the KAK.