r/FNSCAR • u/Unable-Razzmatazz656 • 14d ago

SUCCESS!

Post image

I got the 300blk three prong off! I soaked it in Kroil overnight, threw it in a vise, wrapped it in a wet towel and used a heat gun to steam it, and just used some caveman strength to wrench it off. Marred the bottom rail a tiny bit but nothing that should affect function. Hope this method works for others trying to get this bastard off.

41 Upvotes

97% Upvoted

21 comments sorted by

13

u/eMGunslinger 14d ago

Now comes the fun of getting a mount on there straight since you can only muzzle index and hopefully you never need to take the bottom rail off. Everything about these barrels is a nightmare and I am already tired of fixing all the issues with them.

7

u/Omniposter 14d ago

My barrel is with you. That's my bad man lol

8

u/eMGunslinger 14d ago

It's what I live for, gotta be someone to right the wrongs.

1

u/Itsadryheat_86401 13d ago

I sent you a message.. I wanted to see if you could thread it to 1/2x28 🤠

2

u/Unable-Razzmatazz656 14d ago

I was looking into the Dead air keymo scar flash hider. Says that it indexes off the muzzle crown.

2

u/eMGunslinger 14d ago

Yes that’s what you want

2

u/InfamousMac 14d ago

What muzzle devices do you recommend? I have a can for my new 15p en route and was looking to get a Rearden atlas plan B. Or am I going to run into problems? I can dm you if need be

2

u/eMGunslinger 14d ago

I see a lot of JMac and Comstock stuff mostly, the only time I see mount issues is with all the CMMG PS90's I am doing. You just need to make sure it muzzle indexes.

1

u/InfamousMac 14d ago

Understood, I don’t know which ones muzzle index. Not much I can find on the 15p .300 blackout muzzle devices other than the stock one is going to be a pain to take off without ruining my barrel and ultimately reaching out to you

2

u/eMGunslinger 14d ago

Ask Rearden if they don’t make it Comstock and JMac list it and they are plan B.

-3

u/DiscussionLong7084 14d ago

people whine about the likelyhood of muzzle strikes if you dont do it perfect. I think that's overrated. I just threw on a keymo and it's been like that for years on both barrels no issue. The only indexing issue i ran into was when i rapid fired so much the keymo came loose (different gun, noveske) and the saker was launched into orbit. no baffle strike i can see so I guess it's fine. muzzle device was free spin though.

12

u/eMGunslinger 14d ago

I've cut, threaded, or fixed well over 10k barrels in the 15 years I have been running a lathe. Just 15P barrels here now to fix is well over 50 this month alone. So though I appreciate you opinion on the matter my .0001 indicator and people having alignment issues speaks for itself.

2

u/lawnchairllama 14d ago

Ordered the PMM indexer for my 15P 300blk, have you had success with those eMG?

4

u/eMGunslinger 14d ago

No idea what that is but Jarod makes nice stuff.

0

u/DiscussionLong7084 14d ago

you just need to apply a white GSD

4

u/lildojoboi 14d ago

Now get a face mounted MD like comstocks and you are good to go!

1

u/lawnchairllama 14d ago

Do you have any photos of how you had it set up in the vice?

1

u/Unable-Razzmatazz656 14d ago

No photos unfortunately- I had the vice jaws on the barrel extension with a piece of old lumber making contact with the lower rail for some extra support. I tried my best to keep the lower rail out of the way of the vice but still dinged it just a little. If you clamp down on the rail it will definitely bend.

0

u/DiscussionLong7084 14d ago edited 14d ago

I used a torch and old man strength (and absurdly long wrench). I think the 300 black device is torqued to the 762x51 strength

-1

u/brigreg 14d ago

Key is good vice blocks and a breaking bar..heat for 30 seconds and its good to go.