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Posted: 12/30/2009 12:41:08 PM EDT
| do they come in the receiver or do I have buy and add it. |
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Feed ramps are part of the barrel extension (which is delivered as part of every retail barrel). M4 feed ramps are cut at a shallower angle and continue into and extended ramp that is machined into A4 upper receivers. Receiver and extension should be purchased to match (both either rifle or M4 feed ramps). I will just add that someone will be along shortly to add that a M4 barrel extension and rifle receiver (both referencing the feed ramps) are compatible and a rifle barrel extension and M4 receiver are not. To simplify though buy the barrel or receiver or both to match. There are many pictures illustrating this if your do a search. One sight that was helpful early in my education was this:
http://forums.officer.com/forums/showthread.php?t=81462 |
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