A brief overview of the Shield Sights RMS on a Glock 19 MOS.

Shoobedoo · Sep 21, 2017

SCARCQB said:
i had high hopes for it. had my favorite g19 cut specifically for it. then... murphy showed up.

I know this thread is a bit old, but I don't see if the issue has been resolved or not.

I'm not sure if a Burris Fastfire III will fit your slide cut or not, but if it will you might want to consider one if you eventually can't get your Shield to work properly.

I have Fastfire III's on 3 different guns, a G20, G21, and an M&P .40, I've never had a lick of trouble out of any of them after many hundreds of rounds fired.

If you can, use a torque wrench when installing any red dot like these, If I remember correctly 12-15 inch lbs. is about what most of the manufacturers recommend.

slybarman · Sep 22, 2017

Shoobedoo said:
I know this thread is a bit old, but I don't see if the issue has been resolved or not.

I'm not sure if a Burris Fastfire III will fit your slide cut or not, but if it will you might want to consider one if you eventually can't get your Shield to work properly.

I have Fastfire III's on 3 different guns, a G20, G21, and an M&P .40, I've never had a lick of trouble out of any of them after many hundreds of rounds fired.

If you can, use a torque wrench when installing any red dot like these, If I remember correctly 12-15 inch lbs. is about what most of the manufacturers recommend.

How durable is the fastfire? Good for the range only?

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SCARCQB · Sep 22, 2017

I have a fastfire 3 on my glock 34. It has held up to use very well. It's also waterproof. But the battery life sucks. I have to pop in a new battery every 3 months.

I've been using this for the past 6 years with no issues.

The RMS will fit into the Burris fastfire 2's milled slot. But will have gaps.

The ff3 is a bit longer compared to the RMS . ( the RMS, docter, optima, sig, etc. have identical footprints and mounting screws)

The delta point, trijicon rmr and fastfire3 have proprietary cuts

SCARCQB · Sep 22, 2017

The RMS also offers the best clarity in terms of the lens. No perceivable tint. Very minimal parallax. The lens also scratches easily as it is made out of plastic. A q-tip can actually scratch it.

It's also not waterproof. There is no sealing gasket underneath. I won't trust it in damp or wet environments. It will short out.

SCARCQB · Sep 22, 2017

I have an RMR slide for backup. Just in case.

SCARCQB · Sep 22, 2017

The RMS also will absolute co-witness with factory iron sights. If you're lucky.

There is a cut out at the rear of the RMS that resembles a rear sight. It this zeroes with your pistol. It's a matter of luck. You really can't drift the RMS to compensate for wind age . I would still recommend using taller suppressor height sights with it. This give you the ability to adjust for wind age and get a true color- witness set up.

Shoobedoo · Sep 23, 2017

SCARCQB said:
I have a fastfire 3 on my glock 34. It has held up to use very well. It's also waterproof. But the battery life sucks. I have to pop in a new battery every 3 months.

I've been using this for the past 6 years with no issues.

The RMS will fit into the Burris fastfire 2's milled slot. But will have gaps.

The ff3 is a bit longer compared to the RMS . ( the RMS, docter, optima, sig, etc. have identical footprints and mounting screws)

The delta point, trijicon rmr and fastfire3 have proprietary cuts

Good info SCAR, thanks.

I've been very pleased with the Fastfire III thus far, one thing I really like about it is the top loading battery compartment, it makes battery replacement a breeze. Battery life may leave something to be desired, but the battery is a common type and not expensive to replace, so I can live with that.

I have a Trijicon RMR as well, don't get me wrong, it's outstanding in every respect, but for the money the Fastfire III is hard to beat IMO.

SCARCQB · Sep 28, 2017

New upper assembly for a gen 3 glock 19

Fox123 · Sep 29, 2017

Shoobedoo said:
for the money the Fastfire III is hard to beat IMO.

What kind of warranty does the FFIII have?

I was drawn to the vortex viper, mainly for cost and the no questions asked lifetime warranty.

SCARCQB · Sep 29, 2017

I had a fastfire 3 that failed after 2 months. Burris replaced it with no questions asked.

Two week turnaround.

Sewer Rat · Sep 29, 2017

For shitsngiggles, and because I was just wondering... bought a trijicon clone and mounted to my fauxG19... so far after about 100 rnds its surviving. Let the 15 yr old play with it to help break in the new frame.

SCARCQB · Sep 30, 2017

SCARCQB · Sep 30, 2017

Kompressor g19

slybarman · Oct 1, 2017

Cowitness is nice.

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A brief overview of the Shield Sights RMS on a Glock 19 MOS.

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