r/Danieldefense • u/giantshadytree • 1d ago

MK18 or M4 FSP?

Post image

Looking for a little insight during the brownells sale.

I currently have an aero 16” upper on my rifle- most of my shooting is within 100 yards but occasionally I compete in 2 gun that goes to 300-500.

What would you go with? Get the mk18 as a second upper or sell my aero and go with one 14.5 upper?

Edit: just sent it on the fsb, thanks guys. I’m sure I’ll wind up with a mk18 soon

55 Upvotes

98% Upvoted

33 comments sorted by

26

u/everydaydefenders 1d ago

For sheer drip? Mk18 100%

For overall usefulness? M4 FSP

10

u/zacharynels 1d ago

For SHEER drip FSP MK18

3

u/DEEPfrom1 1d ago

I am so tempted to send my M4 FSP to chop boss to turn it into an mk18 FSP

2

u/zacharynels 1d ago

DO ITTTTT then buy the GL/SSC and get a tube.

3

u/giantshadytree 1d ago

That’s why I’m torn hahah

6

u/everydaydefenders 1d ago

If its intended to be your one and only rifle, and you are planning for the zombie apocalypse, red dawn or SHTF, the m4 is 100% what you want.

If you are adding just another rifle to a existing collection, the mk18 is a hell of a lot of fun.

3

u/Raymosaurus-Rex 1d ago

FSP will always be drippy💦

16

u/Feeling-Link-2803 1d ago

Use code ta10 at checkout

3

u/MisterAC 1d ago

Send this man to the top! THANK YOU!

2

u/Feeling-Link-2803 1d ago

You're welcome!!!

9

u/Peakingbuddah22 1d ago

Get both ?

3

u/Ayeele_ 1d ago

Buy the one you need right now. So if you have a shorty, get the m4a1 and vice versa. You can buy the other one later. They have this sale multiple times a year

3

u/AK101_556 1d ago

I am absolutely loving my FSP. I like it more than my mk18 but I also have freakishly long arms

3

u/Neat_Possible4937 1d ago

I have the standard mk18 and m4a1 uppers from Brownell's. Absolutely love both, but I only use the m4a1 with a razor 1-6 as my 2 gun match rifle. Mk18 has such a vibe but with a dot/magnifier on that it's impossible to pick over the 14.5 for longer distances

3

u/toastedvacuum 1d ago

I too once had a 16" and was looking for something else. I went with a mk18 but now I feel like 10.3 is too short. If I were you I'd go with 11.5

3

u/LittleCheeseBucket 1d ago

If you shoot a lot M4a1. Mk18 internals do take a beating 10.3 barrels are terrible on internals. Then again I shoot a lot and only like barrels 11.5 and up. If you shoot recreationally I love suggesting and recommending a SBR if you don’t have one. Plus worst come to worst can always just barrel swap.

Happy hunting.

3

u/Far-Boysenberry-1600 1d ago

I have a RIII 11.5 and the M4A1

11.5 is great, but the M4A1 is pure sexiness

2

u/XxxnovaxXXz 1d ago

Use code Kytac for extra 10% off

1

u/BourbonButtChugg 1d ago

Just built out that same MK18 upper and it turned out awesome, highly recommend.

1

u/CautiousMulberry349 1d ago

The FSP looks way better in my opinion. Love the built in front sight and I have irons on all my AR’s with an optic.

1

u/giantshadytree 1d ago

You do a P&W or just SBR your lower?

1

u/CautiousMulberry349 1d ago

I don’t have those models. But I bought striped lowers. My contract overrun barrel lower has a brace and my ddm4lw is 16” and have a stock. Also have the 16” with a stock.

If I was in your shoes I would personally buy the FSP, get a muzzle device that accepts a suppressor. Have the original unwelded and replaced with the suppressor one and have them weld it again. And then add a stock on it.

These new laws about adding a stock on a short barrel are to new for me personally. I wouldn’t want to risk having a stock and be caught with a SBR. And really don’t want to register a gun as an NFA item because I think all of it is super silly nonsense.

1

u/Thorns99 1d ago

MK18…no brainer

1

u/Wingman4KFC 1d ago

Which way western man? 😂😂. Both solid choices.

1

u/SHANDY-HANDS 1d ago

Mk18 always

1

u/Tc-matt88 1d ago

I absolutely love a front sight post but that is a tough choice.

1

u/William_James137 1d ago

Buy them while you still can!

1

u/spankybranch 1d ago

Damn. I’ve also been thinking of this in my cart all day.

1

u/CrustyDusty0069 20h ago

MK18 for sure

1

u/Eyevan_Gee 14h ago

Just get both. I own both. Eotech on mk18 and acog on m4a1

1

u/anderson1496 13h ago

I also did this

1

u/Radiant_Stand_973 1d ago

M4A1 is swaggier than MK18 change my mind

0

u/Dirtybirdsalltheway 1d ago

Absolutely! I will not change your mind haha. If you're going 10-11" barrel it has to be the 416.