Anyone got pics of the two different versions? There is a “Rifle Length” version, and a “Carbine Length” version. I have been wanting to see some GOOD, online pics of the two different length MRP rails. Even the latest issue of “Book of the AR15” does not give the greatest angle pics, and the LMT website doesn’t show shit for pics!
What is the deal with the bbls? WHY are they not M4 profile? I love the turned down look of the M4 profile bbl, and I’m wondering if there is any reason I couldn’t have AR15barrels.com turn the bbl down on an MRP, just as my Colt barrels are???
Are the gas blocks PINNED on the LMT MRP’s??? I sure as HELL hope so.
What do you guys recommend for the bbl? Regular chrome lined, or SS? Is the SS bbl still finished in black, or is it a shiny, stainless steel silver, raw finish??? (some SIG handgun bbl’s are still black finished/etc.)
What would YOU guys choose??
Questions are numbered for ease of reply.
Thanks for any help here guys. I’m seriously thinking of purchasing a new MRP here soon, but need the above questions answered first… Thanks to all…
got some pics of the carbine version on my site. lots of pics on MSTN’s section on TOS.
no need for M4 profile since you’re not going to attach an M203 to the barrel. you can always send it out to get turned down.
yes
depends on your preference and needs. i got the chrome lined. the stainless barrels are shiny silver but you can send it out for a bead blasted finish.
I know WillC (M4C - Industry Professional) has an MRP that he raves about. I will make sure he knows about this thread. Maybe he can help answer some of your questions.
You could of course have the barrels turned down to any profile you like.
Gas blocks are pinned. I’ve got 4 different barrels (18" 1/8 SS, 16" 1/7 SS, 14.5" 1/7 CL, & 10.5" 1/7 CL) and no problems with any of them.
The most accurate barrel I have is the 16" 1/7 SS barrel. It’s on the rifle length MRP in the middle picture. I coated this barrel myself with some high heat ceramic DupliColor header paint, and cured it in the oven as per directions. No problems thousands of rounds & numerous cleanings (powder solvent, copper remover, brake cleaner) later.
I have a 11.5" 6.8 and a 10.5" 5.56, both are chrome lined.
It is a very sweet system, but pricey.
If accuracy is a large concern, go with stainless, I haven’t heard any complaints.
You can do pretty much whatever you would like to an MRP barrel. This includes painting, beadblasting, choping, profiling, etc. My 6.8 started life at 16" with a 5/8x24 thread pattern and is now 11.5 with a 1/2x28 thread pattern.
ETA: This picture shows the barrel profile. It is already fairly light and I for one am very happy with the weight of the system as-is.
The M4 profile barrel is actually one of the worst barrel designs out there. As a Civy, there is ZERO need for the M4 profile and they actually look stupid IMHO.
I’ve got three barrels (1x 5.56 18" SS, 1x 5.56 16" CL, 1x 6.8 16" CL) and they shoot pretty well. I’ve HEARD that they are Mike Rock barrels but I’ve never seen anything conclusive or confirmed by those “in the know”. At anyrate, they shoot pretty well. The reports I’ve heard from other owners is that the 16" SS 5.56 shoots the best.
Barrels can be swapped as quick as you can take two Torx bolts out and put them back in. The only bad thing about the barrel swapping is that you are limited to the LMT barrels that they decide to offer. Right now you can choose between 5.56 and 6.8 - someone said a .204 Ruger is going to be available eventually. The issue is that their barrel extensions are different than standard barrels - there were some barrel extensions out there that people were using to have custom barrels made but they’ve since dried up.
Question for those with multiple barrels - how do you store the extras? I’ve been working on way to store them in PVC pipe…
Paul, the middle pic is of a 16" (rifle length rail) and the other two are 10.5" (carbine length rail).
The Military Morons sight has some pretty good pics of a MRP Carbine length with a 14.5" barrel and MSTN’s Industry page on ar15.com has a few of the carbine length with a 16".
If I take another barrel with the SBR MRP I usually just put it in the outside pocket of the i-SHOT case over the mag and accessory pockets (containing mags, Halo III, Surefire light & SpecWar2 suppressor).
The other pouches with the rifle contain a Strider SNG, 3X Magnifier, and a E2 Surefire.
Usually the barrels just sit on a shelf covered in that mesh so many sellers ship them in now.
Let me ask you guys this, as the MSTN site confused me a bit. A couple more questions:
MSTN stated that ALL 10.5" and 14.5" bbl MRP’s (regardless of rail length), have CARBINE LENGTH GAS SYSTEMS, and ALL 16" and 18" bbl MRP’s have MID-LENGTH gas systems.
IS THIS CORRECT? I have ALWAYS been under the impression that LMT made ONLY carbine length gas systems. Did this change with the addition of the MRP 16" and 18" rifles?
It’s my understanding that the NEW LMT MRP Gas Piston System will ONLY be applied to CARBINE LENGTH RAILED MRP’s. This is apparently due to the fact that the Gas Piston system will NOT fit under the MRP rail. Is this true? I THINK Grant? told me this, so I’m thinking it’s true.
IF LMT does indeed make carbine length AND rifle length DI gas systems, then will the gas piston system be DIFFERENT for each gas system length???
Will the gas piston system most likely be DIFFERENT OR the SAME for the .223 and 6.8 calibers??? Anyone have a guess???
Thanks guys. Just trying to make the right purchases here…
This is correct. There are two gas systems available (carbine and mid).
It’s my understanding that the NEW LMT MRP Gas Piston System will ONLY be applied to CARBINE LENGTH RAILED MRP’s. This is apparently due to the fact that the Gas Piston system will NOT fit under the MRP rail. Is this true? I THINK Grant? told me this, so I’m thinking it’s true.
This is correct.
IF LMT does indeed make carbine length AND rifle length DI gas systems, then will the gas piston system be DIFFERENT for each gas system length???
This is correct.
Will the gas piston system most likely be DIFFERENT OR the SAME for the .223 and 6.8 calibers??? Anyone have a guess???
I have an LMT gas-piston on the way. I was considering the Tangodown behind the receiver sling mount. I am not familiar with the one here. It is less bulky. Can any of you in M$ land tell me who makes it, and where to get it? Gotttta have it!
I have a CQB MRP (carbine length) with the 16" mid-length CL bbl. I’m really happy with it, other than I want another one.
I was thinking of having the 16" cut to 14.5" to make it 16" with the bi-lock, but I don’t know if a 14.5" mid-length would fuck with the fantastic reliability I currently enjoy. I know the factory 14.5" MRP barrels are carbine-length gas systems. Anyone tried this?
Have about 1000rds through it, about 300rds per session. 1 FTF from not properly seating the mag doing tactical reload. That’s about it. I use Federal XM193.
Pre-cutting it I ran it though a weekend class without a single failure. It’s awesome.
