In boot camp at MCRD Parris Island - and at the start of my active duty Marine Corps enlistment - we trained rather intensely at donning both our MOPP gear and "affixing bayonets" for CQB scenarios. I even still remember the basic "slash, butt-stroke, and thrust" techniques from training with pugil sticks that are meant to mimic using a bayonet as an integral part of the M16A2 service rifle. When I got my most recent 16" carry handle AR - meant to be used as-is with no batteries/scopes/mods/enhancements for when stuff inevitably breaks during real SHTF scenarios - there was a 0% chance that I would leave off its life-saving melee capability by NOT buying and mounting a bayonet for CQB-specific scenarios. I'm 1000% grateful that OKC still makes Marine Corps fighting knives and bayonets - it's everything that I could hope for in tool for a SHTF and survival situations, IMO. I proudly keep it in good shape and within reach. You really can't go wrong, IMO......

Wish to return. How do i do that?

This bayonet fits my rifle perfectly. I’m happy with my purchase.

Pros: Received packaged on ETA.
All parts of the OKC 3S was securely in place, No loose blade.
Cons: Scratch marks on holder and handle.
Yellow stains on the blade (easy fix, apply 2 layers of mineral oil).
The point: Don't worry the cosmetic imperfections do not affect the use of the Bayonet. Great OKC 3S overall.

I purchased this knife because, why have a bayonet lug on your AR if you have no bayonet? The only critique I have is that the retention spring (I don’t know if that is actually what it is called?) that holds the blade securely in the sheath has no protective coating on it, so the first time you put the knife in the sheath it immediately scratches the black coating on the blade all to hell. It seems like a very easy/cheap fix, just coat the spring in some type of plastic or something? It’s not just a cosmetic problem, I imagine over time I will have to take extra precautions to prevent rust in those scratched/exposed areas?