Troy MRF-C gap

[ShermanM4]

I bought a Troy MRF-C about a month ago used.

I got it installed everything is tight and straight and I like it a lot.

Only thing that is bothering me a little bit is this gap

http://i163.photobucket.com/albums/t301/rshermn/IMG_1645.jpg
http://i163.photobucket.com/albums/t301/rshermn/IMG_1647.jpg
http://i163.photobucket.com/albums/t301/rshermn/IMG_1646.jpg

I have it on a BCM 14.5 pinned carbine upper.

Is this the fault in the rail or the barrel nut?

I am not really concearned about it, just curious what you guys think and if this is a problem I should worry about.

Thanks!

[scottryan]

That gap is completely normal.

[ShermanM4]

Ok, Thanks Scott!

I have just seen other FF rails where they gap is not there at all, why I was wondering.

Feel better about it now.

Thanks again!

[Nightvisionary]

That gap is completely normal.

It's not "normal", it's just normal for Troy. Troy's own website states "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That in no way meets the definition of "uninterupted" nor "perfectly aligned".

[markm]

I have one of those on a beater gun. Same thing. That gap doesn't really bother me.

[ShermanM4]

It's not "normal", it's just normal for Troy. Troy's own website states "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That in no way meets the definition of "uninterupted" nor "perfectly aligned".

Your right... I have seen other Troy rails though that sit completely flush however.

It is perfectly aligned, just that gap.

I'm going to contact Troy.

[scottryan]

It's not "normal", it's just normal for Troy. Troy's own website states "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That in no way meets the definition of "uninterupted" nor "perfectly aligned".

Several rails from several brands have that gap.

You can't get an uninterrupted rail unless you get a monolith.

[Nightvisionary]

Several rails from several brands have that gap.

You can't get an uninterrupted rail unless you get a monolith.

Scott, in my earlier post I noted that Troy's own website has this description of the OP's rail "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That is Troy industries words not mine. Troy disagrees with you on that point. Here is the pic of the OP's rail followed by pics of my Midwest Industries Gen 2 SS and Samson/Rainier Arms Evolution rail, and a Centurion rail. One has a gap you can slip a quarter in. The others do not.


OP's Troy MRF rail with large gap.


24638


My Midwest Industries Gen 2 SS rail


24637


My Samson/Rainier Evolution

24636


Centurion rail

http://stickman.rainierarms.com/galleries/Centurion%20Arms/CTML0152-1024-Stick.jpg

[scottryan]

Scott, in my earlier post I noted that Troy's own website has this description of the OP's rail "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That is Troy industries words not mine. Troy disagrees with you on that point. Here is the pic of the OP's rail followed by pics of my Midwest Industries Gen 2 SS and Samson/Rainier Arms Evolution rail, and a Centurion rail. One has a gap you can slip a quarter in. The others do not.


OP's Troy MRF rail with large gap.


24638


My Midwest Industries Gen 2 SS rail


24637


My Samson/Rainier Evolution

24636


Centurion rail

http://stickman.rainierarms.com/galleries/Centurion%20Arms/CTML0152-1024-Stick.jpg




The statement on troys website comes from an era when these rails were first released. They butted up against the upper over he barrel nut as oppose to a rail like a KAC RAS.

[justin_247]

It's not "normal", it's just normal for Troy. Troy's own website states "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That in no way meets the definition of "uninterupted" nor "perfectly aligned".

The gap is perfectly normal. Tons of rails out there have this, and it does not affect anything. For example:

Noveske
http://img585.imageshack.us/img585/4187/swsmur6d.jpg

Daniel Defense
http://i55.tinypic.com/240zkmu.jpg

Knight's Armament
http://www.impactguns.com/data/default/images/catalog/535/kmc-30351-2.jpg

[justin_247]

Scott, in my earlier post I noted that Troy's own website has this description of the OP's rail "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That is Troy industries words not mine. Troy disagrees with you on that point. Here is the pic of the OP's rail followed by pics of my Midwest Industries Gen 2 SS and Samson/Rainier Arms Evolution rail, and a Centurion rail. One has a gap you can slip a quarter in. The others do not.


By "uninterrupted," they are comparing the rail to such rails as the KAC RAS and LaRue rails, which have about a 1/2" gap between the top rail and the rail on the upper.

Additionally, the two rails that you posted use a completely different kind of lockup system than the Troy rails that the user posted. His uses the teeth of the barrel nut to index the rail, whereas yours simply slip on a barrel nut. Here's a Samson rail that uses the exact same kind of lock-up system that is exhibiting the same problem as the user's:

http://ep.yimg.com/ca/I/policestuff_2305_1004445976

Also, in your rush to attack Troy on this - which is apparently based on simple lack of historical knowledge with regard to the evolution of rail systems - you fail to take into account that some barrel nuts may result in a better lock-up than other barrel nuts, and that the threading on the upper receiver also plays a role in this.

[JSantoro]

Such gaps on such rails are utterly normal, and, presuming proper installation and alignment, are of no impact. I've had a MRF impact me, but only because it got installed nose-high; front sight ran out of adjustment, and the lazer nearly did. Correct alignment upon re-installation fixed it. The infinitesimal gap was purely cosmetic; whether one feels Form > Function or not is purely one's own internal struggle.

Same with their tubes. Had three, on three different guns, and there's enough tolerance variations in known-good parts that mixing stuff from different vendors like a 7-bean salad might not result in perfect mating surfaces. Install them right...particularly the most-current Alpha setups...if one can't build a bridge and get over it, they'll probably swap you if you ask. Whatever one's thoughts as to their fact-checking on hirings, their CS has remained top-end and they'll be responsive.

To say that there's no such thing as an uninterrupted top rail except in regard to monolithic uppers, is the best way to summarize it.

[Iraqgunz]

Please remove yourself from the thread. OP- If you are really concerned then contact Troy and address the issue.


Scott, in my earlier post I noted that Troy's own website has this description of the OP's rail "Troy MRF BattleRails provide an uninterrupted rail extension and hand guard aligned perfectly with the host weapon’s flat-top receiver." That is Troy industries words not mine. Troy disagrees with you on that point. Here is the pic of the OP's rail followed by pics of my Midwest Industries Gen 2 SS and Samson/Rainier Arms Evolution rail, and a Centurion rail. One has a gap you can slip a quarter in. The others do not.


OP's Troy MRF rail with large gap.


24638


My Midwest Industries Gen 2 SS rail


24637


My Samson/Rainier Evolution

24636


Centurion rail

http://stickman.rainierarms.com/galleries/Centurion%20Arms/CTML0152-1024-Stick.jpg

[ShermanM4]

Justin and jsantoro -

Thanks for your input! I have emailed Troy, but I trust now that this is a non/issue and will move on from it.