Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
3/4/2012 4:54:35 PM EDT
So I've been looking around to replace the plastic guards on my PSA Carbine 16" M4 and  have it narrowd down to these two Troy  and YHM Diamond  , but had a few questions. I mainly use the rifle for coyotes, prairie dogs and plinking no further than 200 yards. I will most likely be attaching a vert. grip and a light to the rail. How much will the non FF affect the accuracy vs a FF, and does anyone have this same setup or have a good idea how well it will fit with the rifle? If you have pics that would be appreciated! Thanks in advance.
3/4/2012 5:04:17 PM EDT
[#1]
I had the YHM hand guards on one of my rifles, but hey felt very wide and bulky. I replaced them with the troy extreme rails and I like them better. FF tubes generally improve accuracy.
3/4/2012 5:06:09 PM EDT
[#2]
Ya, I knew that they helped with accuracy but I looked around and I couldn't find anywhere where it stated how much it affected accuracy without a FF.
3/4/2012 5:49:14 PM EDT
[#3]
I did some more heavy digging through threads and what I found is that with a non FF there is roughly .5 in. per 100 yds in accuracy. So it sounds like the two piece would be best fit for me at the moment. This is my first AR complete rifle and I will definitely be building on down the road so I'll hold off on the FF for a build once I've became more familiar with the AR platform.
3/4/2012 6:22:23 PM EDT
[#4]
Quoted:
I did some more heavy digging through threads and what I found is that with a non FF there is roughly .5 in. per 100 yds in accuracy. So it sounds like the two piece would be best fit for me at the moment. This is my first AR complete rifle and I will definitely be building on down the road so I'll hold off on the FF for a build once I've became more familiar with the AR platform.


Sounds like someone is taking bolt gun concepts and trying to shoehorn them onto the AR platform.

First of all the only factor free floating itself has to do with is barrel harmonics.  Barrel harmonics is one TINY factor out of the dozen or so other major factors involved in accuracy.  Putting a free float on your rifle will not automatically make your groups tighten up, and even if it did you would have to cancel out all of the other major accuracy factors first.  Whoever said the .5" number is insane... literally.  That is a HUGE jump in accuracy and wayyy more than barrel harmonics could account for unless your barrel was screwed to begin with because of the non-floated rail beforehand.

If someone recorded a .5" increase in accuracy, and the ONLY factor changed was free floating the barrel then he probably had his barrel nut stupid loose or stupid tight before and installing a free float brought him back to normal torque values.

Next... this is where people get confused, free floating isolates your barrel from outside pressures... such as a sling when shooting sling supported or a bipod or a barrier. How much of a difference you will see here depends mostly on a case by case basis compared to how much pressure you were putting on your barrel at that particular moment.

If you are planning on doing long tight shots using a bipod.. shooting for groups... if you are hunting larger game that requires precise shots and shooting supported.. sure get a free float, why not.  But free floating tends to get REALLY over stressed out there and in the AR platform it really is a situational benefit.

Please don't assume that free floating an AR will automatically make a difference in accuracy that you can see, because unless the situation is such where pressures on the barrel would have been present and effected your accuracy... it won't.

3/4/2012 6:38:55 PM EDT
[#5]
Im new to the AR and I have seen many stress that it affects accuracy a great deal so I assumed it was a "big deal". In my own experience with firearms I know that there are many factors into accuracy and after researching I managed my own opinion that FF is being credited for much more than it deserves in the accuracy department. Ya it plays a small role along with many others like you said but not near as much as people tend to boast about.
3/4/2012 7:59:14 PM EDT
[#6]
You stand to lose way more simply through poor shooting technique and using cheap ammo, then you ever will because of your handguard. Any drop in two piece will work. Midwest Industries makes a nice affordable drop in two piece. Also Knights RAS and RIS systems can be found used for cheap.
3/4/2012 8:19:57 PM EDT
[#7]
Quoted:
So I've been looking around to replace the plastic guards on my PSA Carbine 16" M4 and  have it narrowd down to these two Troy  and YHM Diamond  , but had a few questions. I mainly use the rifle for coyotes, prairie dogs and plinking no further than 200 yards. I will most likely be attaching a vert. grip and a light to the rail. How much will the non FF affect the accuracy vs a FF, and does anyone have this same setup or have a good idea how well it will fit with the rifle? If you have pics that would be appreciated! Thanks in advance.


on a combat carbine I wouldnt worry about a 2pc rail effecting accuracy
Most M4 come with KAC RAS.

Now a  FF rail would be nice on a SPR or SDM etc!


BTW

I like troy over YHM
AR Sponsor