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View Full Version : 2 Piece VS. Free Float Rail


protoolsnerd
02-26-2011, 4:21 PM
What do you consider the pros and cons of both?

I prefer the 2 piece for the lack of play and a slightly more solid connected feel. But , hearsay is that the minute pressure they put on the barrel can effect its accuracy.

The free float .... all i can tell is that they don't put pressure on a barrel and have a tiny bit of wiggle.

I'm looking at both kinds from Troy and YHM.....Good products without dropping 250+ on say a Daniel Defense.

WHAT SAY YE?:chris:

shadow65
02-26-2011, 4:33 PM
I'm not sure what kind of free float you are using that has wiggle but my DD Lite does not move.
Unless you have a real tac driver, you probably won't notice much difference.

dieselpower
02-26-2011, 4:34 PM
It depends on what brand, type model. 2P can wiggle, ff can wiggle...

For me its a case of need. I once needed rails, didn't need extreme accuracy, but needed a place to mount things with no wiggle. I went with GG&G mission configurable. I now dont need rails, so I went back to standard hgs.

protoolsnerd
02-26-2011, 4:43 PM
I have a mid length BCM upper with a 16" barrel. I don't need a ton of rails . Just need to mount my optic front flip up mbus sight and a forward grip. I'm leaning towards either the mid length 2 piece or free float YHM.

If there won't be much of a difference between free float and 2 piece in terms of motion....i'll probably opt for the free float. Gives me more options
Thanks for the info so far ! =)

RRichie09
02-26-2011, 4:50 PM
Wait, your mounting your optic to your handguard?

protoolsnerd
02-26-2011, 4:53 PM
No my optic will be on the rail on my upper . Just mentioning what i have that i need to mount on a rail.

As the handguard goes , for now just my forward grip . Trying to figure out where to mount my Magpul Mbus front sight .

Where would you mount it? End of a longer handguard or on a separate small raised rail closer to the muzzle. I'm a newb in the world of AR and i'm just squaring away my final accessories .

dieselpower
02-26-2011, 5:11 PM
MBUS are to be mounted on Freefloat rails at the end nearest the muzzle. Most 2P rails will not be steady enough for MBUS work. each shot may alter the poi/poa, and your force on the rails will also alter the poi/poa.

poi/poa = point of impact / point of aim.

Bug Splat
02-26-2011, 5:31 PM
Personally I think the only time you should use a 2 piece is when you don't have enough money for a FF. A 2 piece has nothing over a FF other than cost.

Josh3239
02-26-2011, 5:48 PM
1) There are two piece free float handguards so :confused:
2) What free float handguards have wobble? In my experience with Troy/VTAC's TRX, YHM, DD, and MI there is no wobble. The only wobble I have experienced is with non-free floats.
3) Slightly more connected how? Most free float handguards come with its own barrel nut, a few with their own upper assemblies. Does it get anymore connected than that?

If you get a chance to play with a bunch of different handguard systems it becomes obvious real quick which ones produce better accuracy and are built to a better quality. Sure, I've used the non-FF handguards and they worked fine but it just doesn't make sense to me not to upgrade.

RRichie09
02-26-2011, 5:49 PM
Personally I think the only time you should use a 2 piece is when you don't have enough money for a FF. A 2 piece has nothing over a FF other than cost.

Ease of installation, especially if you have a pinned on FH (think 14.5").

ElectronWrangler
02-26-2011, 6:09 PM
I've got a YHM on one and there is no wiggle.

Dirty506
02-26-2011, 6:25 PM
i have the troy TRX extreme 13" and it has no wobble and is lighter than most other rails out there even though it is 13". troy is a great company with quality products. i like YHM a lot but they are a little heavy but still a good quality. my choice would be a troy and i can almost guarentee there will be no play or wobble you will be happy with it.

https://spreadsheets.google.com/pub?key=pwswheghNQsFnUZMkZNF2DQ&output=html

this spreadsheet is a good one

drunktank
02-26-2011, 7:10 PM
My Troy rail (12") on an m&p carbine doesn't wiggle at all... That said, I wouldn't care if it was a two piece because the possible SLIGHT trade off in accuracy would be worth the option of mountable real estate.

SuperSet
02-26-2011, 7:34 PM
There is a document out there somewhere on ARFCOM that Molon put together that tested free float vs. non free float. IIRC, the result was 0.75MOA difference.

HK Dave
02-26-2011, 7:44 PM
I've never seen or used a free float that wiggled?! Two Piece that wiggled many but free float?!

tacgunner530
02-26-2011, 7:46 PM
why not both two piece and free float? i too have a BCM 16" middy, and i went with the midwest industries two piece free float rail system, and it's very solid. no movement at all. and i didn't have to mess with pulling off the front sight base/gas block, gas tube, or barrel nut. i just cut off the delta ring with a hacksaw (i know it sounds primitive, but it was actually very easy and effective) and bolted the sucker on. plus it was cheaper than most other free float rail systems.

protoolsnerd
02-26-2011, 8:42 PM
Really interesting .... So in essence it's ease of installation that would prompt someone to buy a 2 piece over a floated rail.

Methinks the YHM diamond series mid is one that i'm damn near ready to buy. I'd love a DD but that gets quite pricey .

as MI goes, i was checking out one of their 2 piece rails but have yet to see a free float or a 2 piece free float. Didn't know that existed .... best of both worlds or not unlike " fusion " food ... they end up doing both worse

Cyc Wid It
02-26-2011, 11:20 PM
Monolithic. No wiggle and doesn't touch the barrel.

Flyingpootang
02-26-2011, 11:35 PM
You can use a upper/fore end rail connector from ebay $41.00
http://cgi.ebay.com/Madbull-Max-Tactical-RAS-Fixed-Rail-Sight-Riser-/390273581156?pt=LH_DefaultDomain_0&hash=item5ade1e4064

Buy a KAC replica rail $170
http://cgi.ebay.com/G-P-RAS-II-Handguard-Kit-Airsoft-AEG-GP265-/320567441314?pt=LH_DefaultDomain_0&hash=item4aa34ef7a2

Buy an real KAC RAS II $379
http://www.knightarmco.com/shop/index.php?main_page=product_info&products_id=36

tacgunner530
02-27-2011, 7:29 AM
http://www.midwayusa.com/viewProduct/default.aspx?productNumber=184386

there is the link for the mi 2 piece free float rail. as far as the "fusion food" of the 2 piece free float, not in my experience. it locks up tight, and it's free floating.

m16
02-27-2011, 7:49 AM
First of all, there are 2-piece handguards that will free float your barrel.

It doesn't matter if your handguard is one or two pieces - if you grab your FF handguard at the tip and yank on it you are going to see some flex and movement but there shouldn't be any wiggle.

pacrimguru
02-27-2011, 8:20 AM
The free float .... all i can tell is that they don't put pressure on a barrel and have a tiny bit of wiggle.

which free float wiggles?


Buy a KAC replica rail $170
[url]http://cgi.ebay.com/G-P-RAS-II-Handguard-Kit-Airsoft-AEG-GP265-/320567441314?pt=LH_DefaultDomain_0&hash=item4aa34ef7a2[/url

^ are you serious?

missiontrails
02-27-2011, 8:36 AM
Ummm, no..... FF's don't wiggle. If you came across one that did, there was a serious problem. Some of the best FF are 2 piece. My CASV is FF, and I have had Samson Star rails, DD Omega, Midwest, Ergo, Troy..... all 2 piece versions, and all were tight and did the job. With the exception of DD Omega and VLTOR CASV, those others require removal of the delta ring and delta spring.

rareair
02-27-2011, 8:46 AM
You can use a upper/fore end rail connector from ebay $41.00
http://cgi.ebay.com/Madbull-Max-Tactical-RAS-Fixed-Rail-Sight-Riser-/390273581156?pt=LH_DefaultDomain_0&hash=item5ade1e4064

Buy a KAC replica rail $170
http://cgi.ebay.com/G-P-RAS-II-Handguard-Kit-Airsoft-AEG-GP265-/320567441314?pt=LH_DefaultDomain_0&hash=item4aa34ef7a2

Install either of those choices, and you're looking for trouble. Those parts are designed for airsoft :eek:

freonr22
02-27-2011, 8:49 AM
these are excellent, and only $65 http://www.calguns.net/calgunforum/showthread.php?t=288532&highlight=inmiline

protoolsnerd
02-27-2011, 10:19 PM
Thanks for all the tips . I must have picked up one that was not properly fastened . After hitting the Ventura gun show , I manhaned a dozen or more full uppers , and many more rail systems .

For the price and quality I went with a diamond series yhm mid length free float. I'll hopefully be pOsting some pics of it finished . All I need is one of those ar multi tools and I'm gold . Anyone going to the Glendale gun show this weekend ?

Colt-45
02-27-2011, 10:29 PM
Nice thread. I wanted to ask the same question. I know nothing on the subject.

Other than the Daniel defense free float rail for 20" rifles what other options do I have?

I'm building a 20" rifle with A2 front post sight, what are my free floatrail options? (only want free float)

RRichie09
02-27-2011, 10:38 PM
KAC and Larue are the others that pop into mind.

kozumasbullitt
02-27-2011, 10:45 PM
Nice thread. I wanted to ask the same question. I know nothing on the subject.

Other than the Daniel defense free float rail for 20" rifles what other options do I have?

I'm building a 20" rifle with A2 front post sight, what are my free floatrail options? (only want free float)

MI, Larue, YHM

protoolsnerd
02-27-2011, 11:11 PM
Yhm , mi, Troy , DD, magpul, noveske, and a whole ton more . Some cheap knock offs around $75 all the way up to $300+ for the nicer brands . Also depends on what you're planning on mounting on it. The more senior members above will know far more then I've gleaned in the last couple weeks.

RRichie09
02-27-2011, 11:46 PM
Magpul doesn't make a Rail Sysyem and good luck buying a Noveske Rail seperately.

Colt-45
02-27-2011, 11:58 PM
Isn't the KAC a drop in?

RRichie09
02-28-2011, 12:14 AM
Isn't the KAC a drop in?

They have all kinds. KAC Rails (http://www.knightarmco.com/mod_weapons_1.htm)

protoolsnerd
02-28-2011, 12:15 AM
Yes magpul doesn't make a dedicated rail system but you can attach rails and some accessories to the MOE handguard. Figured it was worth mentioning if Colt-45 hadn't seen many.

RRichie09
02-28-2011, 12:20 AM
Yes magpul doesn't make a dedicated rail system but you can attach rails and some accessories to the MOE handguard. Figured it was worth mentioning if Colt-45 hadn't seen many.

But he wants a free float rail. MOE hanguards are not free float.

protoolsnerd
02-28-2011, 1:02 AM
True , sorry bonked on that one , forgot about his caveats

Don29palms
02-28-2011, 6:26 AM
Check out the Samson Evolution rails.