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1/25/2018 7:38:29 AM
Posted: 4/8/2002 1:53:17 PM EST
So what are M4 feed ramps? Can I modify a current barrel to have them? Do they really make a difference?
Link Posted: 4/8/2002 3:57:32 PM EST
[Last Edit: 4/8/2002 3:59:04 PM EST by Duffy]
Other rifles and models may have them, they're supposed to improve feeding in full auto fire, but I'll let other more knowledgable folks jump in This pic is of my Colt 20" upper, purchased in 1991:
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