Review: RovyVon New GL4 Pro, Now With Screw Mount!

Hello Night Chenanigan enthusiast, welcome back. today we take a look at an upgrade to the RovyVon GL4 Pro. Full disclosure, RovyVon reached out to me and offered this LAM for review. Last year, in March, we took a close look at the GL4 Pro. While it was a great alternative to the SureFire XVL2, the one minor issue with it was the clamp style mount that it came with. Well now RovyVon has updated their GL4 Pro now with a screw mount as an option along with their clamp style mount. Let's take a closer look as there are other changes beyond the mount style.

GL4 Pro Screw Mount

You can see the difference almost immediately in the photo above. The original GL4 Pro mount was machined as part of the housing. RovyVon has moved away from that design for a modular body.

Why would you want a screw style mount? The QD style mount is rather fixed in terms of width of the clamping parts. It is not self adjusting so if you try to mount the GL4Pro onto under sized or oversized picatinny rails, you might not be able to get the GL4 Pro to stay on the rail. A screw mount is self adjusting,. as long as you can fit the screw mount over the picatinny rail or Glock frame, you just tighten the screw and the clamping part will grab the rail.

With this new modular housing design, you can choose between Screw or QD on their website.

Looking at the screw style mount, you can see there are two countersunk screw holes and four small threaded holes for the recoil lug. RovyVon provides a picatinny sized recoil lug (the wider one) and a thinner one for Glock frames.

Glock recoil lug next to picatinny recoil lug.

You can position the recoil lug in one of the four positions, in the screw mount, to customize the postion of the GL4 Pro to fit your pistol or rifle. This is mostly used when mounting the GL4 Pro directly in front of a trigger guard.

Since the new GL4 Pro mounts are no longer machined into the housing. the unit sits a little bit further away from the rail. You can see the slight offset difference below.

New GL4 Pro on the left, old GL4 Pro on the right.

Another subtle difference is the explanation for the laser/light settings. RovyVon kept the side of the housing relatively flat so they can laser engrave thre markings larger and thus they are easier to read.

I was pleasantly surprised by the upgraded selector switch. The old GL4 Pro selector switch was a little too low profile and can be a little difficult to manipulate. Now the new GL4 Pro has a tab that you can flip out to rotate the selctor switch. Then fold it back down when you are done. I don't think you could flip that little tab up while wearing gloves, but you could possibly rotate it once its up while wearing gloves.

You can see in the photo above the scalloping of the housing is slightly different in the new GL4 Pro (bottom) compared to the older GL4 Pro (top). Another small change is the size of the paddle switches. The older GL4 Pro has slightly larger switches. However it is not the switch size that is the most noticeable change, it is the function of the switches that has changed.

The original GL4 Pro switches have momentary and constant on. while somewhat similar to the SureFire XVL2, the major difference is that the switch paddles do not stay down or up when you push them. As soon as you let go of the paddle, it will lift back up to the neutral position. Pressing and immediately releaseing these switches quickly will activate constant-on for the GL4 Pro. Pressing and holding the switch down will activate it momentarily until you let go of the switch, whereby the switch will move back up and the LAM will turn off.

This mode of operation is not the same for the New GL4 Pro. Now the switch is like the SureFire style. Once you push it down, it stays down. Or up. At first I thought there was no momentary. However the manual shows that if you push the switch forward toward the body of the LAM, this will activate the GL4 Pro. As soon as you let go, the LAM turns off.

If you recall my previous review of the original GL4 Pro, I discovered it can use the SureFire XVL2 tape switch. Well RovyVon has made their own tape switch. This is the GS1 tape switch. It is a simple single button momentary button. You can double tap for constant on.

Final Thoughts On The New GL4 Pro

The screw mount is a much needed improvement. Now the GL4 Pro can mount to out of spec rails. The operation of the switch is great for those familiar with SureFire X-series pistol lights. Even with the new updates, the GL4 Pro is still only $299. If you want the GS1 remote switch,. it is just an additional $49.95. It comes in black or tan and you can choose between 4 inch or 7 inch length cable. RovyVon sent me their 4 inch cable switch. The new GL4 Pro is available on Amazon now for $329.95.