M-LOK Sling Rail Mount Installation & Overview

Jun 1st 2025

M-LOK Sling Rail Mount Installation & Overview

M-LOK Sling Rail Mount Installation & Overview

BCM Low Profile Push Button QD Mount - M-LOK


Always Better® | February 4th, 2025


In the video, Chris Sizelove introduces the BCM Low-Profile Push Button QD Mount for M-LOK, highlighting its compact design, ease of installation, and other features like its ability to prevent sling twisting during use. Sizelove also walks through the installation process and recommends best practices like marking and applying "witness marks" for testing and observing a secure mount. 


Manufactured by BCM, the BCM Low-Profile Push Button QD Mount for M-LOK rails is a product that perfectly complements any of our slings that have push buttons. Whether you're using a 1-inch or 1.25-inch push button sling with an M-LOK railed rifle, this Push Button QD Mount provides a simple and low-profile attachment point for your sling. 
The BCM mounts are anti-rotational, a small detail that’s absolutely critical for real-world performance. Too many manufacturers produce QD holes and mounts without proper scallops cut into them, which means your push button can spin freely inside the mount.

Why does this matter? As you transition between carry positions – front to rear, low carry to high ready – a rotational QD mount will spin your sling connection. Over time, this creates twist in your sling webbing that makes adjustment difficult or impossible. When this happens, you lose functionality when you need it most. 
Quality buttstock manufacturers embed anti-rotational QD mounts with internal scallops for the same reason. The BCM mounts deliver this same non-rotational reliability for your rail-mounted connection points. 


These mounts are also remarkably unobtrusive. Their small footprint means you can mount multiple units on the same rail without adding significant bulk or weight. Want a QD point at the front of your rail for standard operation? Great. Need another toward the rear for vehicle work or specific shooting positions? The low-profile design makes this entirely practical. 
This flexibility becomes invaluable when you consider different mission requirements. Barricade work, vehicle operations, and various shooting positions may all benefit from different sling attachment points. With these mounts, you can adapt your setup without compromise. 


Simple Installation 


Installation is straightforward. The mount comes with the necessary Allen wrench, and the process is simple: 

  1. Clean off the cosmoline 
  2. Align the two locking feet with your M-LOK slots 
  3. Slide the mount into position and apply rearward tension 
  4. Use the included Allen wrench to tighten down 


Pro tip: You may need to use a small tool through the slot to prevent one foot from rotating during installation. Once you get some initial tension, it'll tighten down without issue. 
Don't forget to witness mark the mounting bolt with a fine-tip paint marker. This gives you a quick visual reference during post-range inspections to ensure nothing is backing out. Consider using Loctite as well – rifles generate significant vibration during use. 


The Bottom Line 


The BCM Low-Profile QD Mount for M-LOK represents exactly the kind of quality component that belongs in a serious rifle setup. It solves real problems, maintains a low-profile, and provides the flexibility to adapt your sling configuration to different mission requirements. 


Watch Video Now

I'm Chris Sizelove, and this is the BCM Low-Profile Push Button QD Mount for M-LOK.

So, we do not manufacture these — this is a BCM product — but it's a fantastic low-profile QD, or Quick Detach, mount for push-button sling mounts, and it's going to go on an M-LOK rail.

Just real quick — the reason we have these on our website is so that the client or customer doesn't have to go to multiple websites to get full mission capability. So, pick your sling. If you're running either a one-inch or 1.25-inch push button on that sling and you have an M-LOK railed rifle, you don't have to go to a different website to buy the mount.

Installation of these things is really simple. I already have one installed up here at the far end of this rail. As you can see, not very big, not obtrusive. The good thing about these as well is — in a perfect world, I want all of my QD mounts, either in the buttstocks or on the rails, to be anti-rotational.

And that's important for me, because the worst thing — a lot of manufacturers make QD holes and QD mounts, but there are no scallops cut in them. So what that means is, when I put my push button in there, the thing will spin free. So as I'm using my sling, as I'm using my rifle — going from front to rear, back to front, low carry, high ready, all these kinds of things — sometimes what can happen with a rotational QD mount is you're spinning this QD and the sling.

Over time, the front of your sling looks like this — and if it looks like this, you're not going to be able to adjust it very well at all. So having non-rotational QD mounts in the front and in the rear — you know, good buttstock manufacturers also embed QD mounts that are anti-rotational; they've got scallops cut inside of them to make sure it doesn't rotate. That's what we need here.

I already have one up here mounted, but the beauty of these things being so small and unobtrusive is — well, what if, for whatever usage techniques I have, I also want to put one back here? So I can just change my sling depending on what I'm doing — vehicles, you know, whatever. Hell yeah, let's do it. That capability is not going to cost me much in terms of size and weight.

So let's go ahead and mount that. When you pull these out of the package, they're covered in cosmoline, so you probably want to take an alcohol wipe and get that stuff off there first — or else your hands are going to get nasty. But you are going to get that amazing cosmoline smell for a couple of weeks after you mount it, so pick what you want there.

All we need to do to mount this thing is get these two feet — you see these turn? These are the two feet. They're going to lock into this M-LOK rail. Get those faced the proper direction, in line with your rails, slide them in there, give it some tension to the rear.

The kit, when you buy these, comes with the Allen wrench. In fact, I think on the website there's a picture of the mount and an Allen wrench, so you're going to get this too.

Go ahead and put a little bit of tension at 12:00. Pull the mount up just a little bit — that's just to get some tension on it so it starts to thread — and thread it down.

Installation of the M-LOK mount is quite simple. You're going to stick it in there, slide it back, and start cranking. A lot of times, I find I’m going to need a tool or something to stick down through that slot and stop one of those feet from rotating — just to kind of give it a little bit of tension. Then it'll tighten up, no problem.

So I got this guy here mounted. Also a good idea — you know, anything that takes a screw on your rifle — would be to take a fine tip paint marker and witness mark these bolts. That’s just so, after a day of shooting, you can do a visual inspection and say, "Yep, red line lines up with red line — that thing’s not starting to back out." Using Loctite could also absolutely be a good thing in this, because these things vibrate a lot when you're shooting the rifle.

Now that they're mounted on there, you can kind of see how many options this gives me. I’ve got a QD hole all the way at the 12:00 because I want all of this range of adjustment. But for whatever reason — depending on what I’m doing: weird barricade, weird shooting position, vehicles, whatever — I can bust this, move it back here toward the end of the rail, and have a little bit different application.

So at the end of the day, these BCM Low-Profile QD M-LOK Mounts is what we go with here at Blue Force Gear. They're on the website for your convenience, and you don’t have to go to multiple websites to get the entire setup that you need.


BCM Low Profile Push Button QD Mount - M-LOK



About Chris Sizelove

Chris Sizelove is a retired Master Sergeant who had a distinguished career in the U.S. Army. Joining in 1999, he served in various capacities in the elite 75th Ranger Regiment spanning across the 2nd, 3rd, and 1st Battalions. His extensive service includes roles as a Pre-Ranger Instructor and a pivotal participant in forming the Regimental Special Troops Battalion (RSTB). Sizelove also held the elite position of Master Breacher of the Regiment and later transitioned to roles in the Defense Intelligence Agency. 



About Blue Force Gear® 

BFG, headquartered in Pooler, Georgia, has been a trusted name in professional-grade gear and accessories for two decades. Their commitment to excellence, innovative designs, and use of premium materials have made them a favorite among military, law enforcement, and recreational shooters worldwide.

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