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AR15.COM
3/5/2012 2:50:23 PM EDT
I have the PSA 16" M4 upper and it's time to swap in some rails. Which size rails do I get? I'm just wanting some drop in rails. The carbine length? Thanks.
3/5/2012 3:13:38 PM EDT
[#1]
We offer several carbine length drop in rails.  We have a couple in stock:

YHM 2 Piece Drop in

Daniel Defense EZ Car 7


Troy and Midwest Industries carbine drop in rails are out of stock.  We just got a couple of shipments today, so they may be up soon.
3/5/2012 3:37:16 PM EDT
[#2]
Carbine length, check.

Personally, for drop-in rails I recommend either Troy, DD, or KAC.

YMMV
3/5/2012 3:49:37 PM EDT
[#3]
Quoted:
Carbine length, check.

Personally, for drop-in rails I recommend either Troy, DD, or KAC.

YMMV


This
3/6/2012 8:27:27 AM EDT
[#4]
We just re-stocked 2 different Troy Rails.  One is a drop in, the other is the MRF, a free float that does not require removing the barrel or FSB (but you would have to cut off the Delta ring assembly).

Troy Drop-in carbine rail:
http://palmettostatearmory.com/index.php/ar-15-05/upper-parts/handguards-rails/troy-battle-rail-drop-in-m4-carbine.html

Troy MRF-C 7" free float
http://palmettostatearmory.com/index.php/ar-15-05/upper-parts/handguards-rails/troy-battle-rail-mrf-c-7in.html
3/6/2012 9:55:42 AM EDT
[#5]
Quoted:
Troy MRF-C 7" free float
http://palmettostatearmory.com/index.php/ar-15-05/upper-parts/handguards-rails/troy-battle-rail-mrf-c-7in.html


dumb question, probably, is there something similar for a mid-length (i.e., free float drop in and only need to cut the delta ring, I don't want to remove the FSB)?
3/6/2012 12:03:50 PM EDT
[#6]
Yes, the Troy MRF-M 9" rail

http://palmettostatearmory.com/index.php/ar-15-05/upper-parts/handguards-rails/troy-battle-rail-mrf-m-9in.html