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Posted: 1/28/2006 5:23:21 AM EDT
A question-----I am sure, quite basic for many of you-----are all rail attachment systems for AR's of the type that must be "pinned" on or some attached/detatchable similar to removing a standard handguard. Thanks! CBR
Link Posted: 1/28/2006 5:27:16 AM EDT
Link Posted: 1/28/2006 5:28:40 AM EDT
2 piece rail systems work like standard handguards and Free Float tubes are "pinned on" (not the correct word)
Link Posted: 1/28/2006 7:21:01 AM EDT
[Last Edit: 1/28/2006 7:22:37 AM EDT by eye_spy]
There are two types of rail attatchments for the AR. The 2 piece rails and the free float (FF) type.

The 2 piece rails attaches like the regular handguards. They make use of the delta ring and handguard cap to "hold" them in place. There are some other 2 piece HGs that have additional screws on them that clamp both pieces together. ex. Surefire.

FF rails are one piece. One solid cylinder with rails on the 12, 3, 6 and 9 o'clock. These are fastened on the upper reciever where the barrel nut usually goes. You have to remove the front sight base in order to slip this on the barrel.

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