The MCarbo Sub 2K Scope Mount

The KelTec Sub 2000 is a fascinating PCC. It’s a simple blowback operated gun that comes chambered in 40 S&W and 9mm. The Sub 2000 also uses common pistol magazines from companies like Glock, S&W, SIG Sauer, CZ, and likely some I’m missing. Oh, also the gun folds in half. Yep, the barrel folds in half and locks into a clip on the rear of the stock. This shrinks the package from 29.25 inches to 16.25 inches. That’s cool, but damn does it make it tough to toss an optic on it. You need a specialized Sub 2k scope mount, and a little company called Mcarbo has presented us with a rather creative option. 

Mcarbo is a small veteran-owned company that has taken a great interest in the Sub 2000 platform. Sub 2k owners need to check them out. They make tons of upgrades for the platform. From muzzle devices to trigger spring kits, they got it all. 

Break it Down 

The Mcarbo Sub 2k scope mount allows you to retain the ability to fold your weapon and allows the gun to run a red dot. The scope mount is spring-loaded, and with the push of a button, it pops out of the way and allows you to easily fold the carbine. When needed, the optic can be pushed back into place in less than a second.

The mount plays host to a short section of Picatinny rail that allows you to mount both compact and mini red dot sights. You’ll want a low mount for maximum comfort and to keep the weapon’s height as low as possible. 

Other Sub 2K scope mounts attach to the handguard in some way, but Mcarbo went a different route. They pushed it rearward, and it attaches to where the handguard starts. The handguard is held on by four bolts, and the Mcarbo scope mount attaches at those bolt points with four included longer replacement bolts. It’s a simple installation and takes just a few minutes to finish. 

In the Field 

The KelTec Sub 2000 is a lightweight weapon, and adding a whole ton of weight to the platform doesn’t make much sense. The Mcarbo Sub 2k Scope mount is made from aluminum and weighs just a few ounces. When paired with a lightweight optic, you won’t notice any extra bulk. 

The paddle to send the optic to the side is somewhat protected by the top of the scope mount. It seems unlikely, if not impossible, to accidentally trigger the scope mount when firing the weapon. I even dropped it on a semi-hard surface targeting the paddle to see if it can be triggered. Ten drops onto a carpeted floor didn’t trigger the optic to spring to the side. The optic mount locks into place with a bit of tactile and audible feedback that lets you know when it’s locked. 

This is the only Sub 2K scope mount that allows you to co-witness with the KelTec’s iron sights. It works perfectly as long as your dot features a low mount option. My iron sights were already zeroed, so it was easy to drift my optic’s reticle in place and be on the money. It’s a nice feature to have, and the optic is placed nice and low for a good cheek weld. Mcarbo also produced a rubber cover that makes aiming with a red dot a good bit more comfortable. 

One fear I had was a loss of zero between popping the optic up and down. It seemed like the lock could potentially have some slack and cause a shift. I was able to confirm there was zero noticeable drift via live fire. Heck, I could even look at the reticle position in relation to my front sight and see that it hadn’t moved. 

Limitations Worth Noting 

Like anything, there are always downsides. The limitations of this Sub 2K scope mount are mainly related to the type of optic you can mount to it. The short section of rail prohibits anything larger than a red dot sight. The height requirement prevents you from mounting any optic that isn’t low mounted. Also, something like a 1X prism isn’t going to be possible since the eye relief is rather far out there. It’s purely a red dot sight mount. 

A red dot is perfect and provides you with plenty of precision inside a 9mm’s potential range and accuracy. 

Final Thoughts 

The Mcarbo Sub 2K scope mount was made to last and made to retain the Sub 2000’s famed folding ability. Like any weapon, the Sub 2000 is made faster and more precise by the presence of a red dot. Mcarbo knocked it out of the park and designed an excellent Sub 2K scope mount that gives you unbeatable performance for such a niche product. This isn’t the only Sub 2k Scope mount, but it’s clearly the best. 


Travis Pike
Travis Pike is a former Marine Machine gunner who served with 2nd Bn 2nd Marines for 5 years. He deployed in 2009 to Afghanistan and again in 2011 with the 22nd MEU(SOC) during a record setting 11 months at sea. He’s trained with the Romanian Army, the Spanish Marines, the Emirate Marines and the Afghan National Army. He serves as an NRA certified pistol instructor and teaches concealed carry classes.