Rost Martin RM1S Comp

[281express]

Today I busted the RM1S Comp out of gun jail and went straight to the range. Mounted an osight se (with no thread locker) and oiled the rails and barrel prior to shooting; gun came out the factory dry. Feels nice in hand with the medium pre installed back strap, similar to a glock 26. Grip angle is similar to a 1911, trigger is gritty but it smoothed out after a few mags. The RM1S is about the same width as a regular glock. Grip texturing feels similar to a stock HC Pro, I have a defgrip wrap on my HC Pro at the moment. Because of the shorter grip, I did get pinched a few times when inserting the short-flush fit mags, gun only comes with one extended mag and sleeve.

I compared this to a Hellcat Pro Comp - the HC Pro shot flatter and was easier to handle due to the longer grip and maybe the lighter/slimmer profile. I should add that I ccw the HC Pro and train with it, so it could just be me not used to the RM1S. Paper was sent back to 10yds, I was mainly shooting to get a feel for the RM1S and not really caring about groups, but the results aren't too bad considering I added a few double taps in the mix.



The port on the HC Pro is bigger than the RM1S, allowing more gas to push the gun down.



Size comparison to a G23 and my wife's Shield


I installed the upgraded trigger once I got home and it's a substantial difference over the stock CA Spec trigger - no mag disconnect, smoother take up and defined wall, great reset feel, 4lb break compared to 6lb stock, and it's metal. I also polished the rails on the locking block, rear trigger housing, and the part of the trigger that interfaces with the striker safety plug, to make everything move smoother.

I didn't take any pics of the full disassembly, but I think there may be a possibility of different after market or oem grip modules/frames. FYI the lower frame is serialized, I didn't notice if any of the internals are serialized. The RM1S, and maybe the RM1C, have a unique fire control group. Unlike Sig and the Echelon, the RM looks similar to a glock when everything is taken apart. But unlike a glock the RM trigger, slide release, and locking block come out of the frame as a unit held together by a pin while the rear housing is a separate unit on its own.

All in all this is a good gun for the price tag. Me being a lefty, the RM1S Comp has full ambi controls and has grip texturing towards the front on either side of the frame for your thumb and index finger. I bought this with the intention of adding it to my ccw, this conceals a little better than the HC Pro due to the shorter grip and fills the hand better too.

 

[presscheckpino]

Great comparison thank you.

 

[num1dude13]

Appreciate the writeup, sir. I Recently added the standard RM1s to my CCW. Hoping they sell the comped slide by itself at some point.

 

[Sloat]

Thanks for the review! How does the plate feel? Looks like it's pretty thick.

 

[281express]

Thanks for the review! How does the plate feel? Looks like it's pretty thick.

Plate is pretty thick but not heavy. Any optic will sit higher than the irons with any of RMs plates. But I replaced the front sight with a truglo XD tritium/fiber optic and it's a little taller than oem that I can get a slight 1/3 witness.

 

[281express]

Did a little more tinkering the other day.

I cut 1.5 coils off the striker safety plunger spring, polished the plunger, slightly beveled the edge of the barrel hood with 1000grit jeweler stone. Took it out to the range and the trigger take up is much better/lighter, still breaks around 4-5lbs at the wall, racking the slide is smoother - not as easy as a glock or canik but definitely better than out the box.

I also just noticed the barrel isn't back bored where the port is. I felt some flak come back to my face while I shot some bill drills - not sure if that's due to the rifling going through the port, the barrel length, or the ammo. Just something to note.

 

[M_N04H]

Plate is pretty thick but not heavy. Any optic will sit higher than the irons with any of RMs plates. But I replaced the front sight with a truglo XD tritium/fiber optic and it's a little taller than oem that I can get a slight 1/3 witness.


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It's a good looking little pistol. Curious how it holds up after many thousands of rounds.

 

[Sloat]

I felt some flak come back to my face while I shot some bill drills - not sure if that's due to the rifling going through the port, the barrel length, or the ammo.

What ammo? Blazer and other plated ammo is known to do this with ports.

 

[281express]

What ammo? Blazer and other plated ammo is known to do this with ports.

Fiocchi Range Dynamics 124gr
Reman Super Vel 115gr

 

[Sloat]

Not sure about the Super Vel (tangent, but their remans always get my hands crazy dirty, i wish they would wash/blow all the crud off first), but the Fiocchi should be good to go out of a ported barrel. Would be disappointing if it were a barrel issue.