Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp - OpticsPlanet from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. American Firearms was established by firearm fans for firearm fans as a modern-day take on all things that go BOOM. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. My 10.3 with a A2 upper works fine. The M4 cut extends down beyond the edge of the barrel extension (has a scalloped appearance), and a correspondingly deeper cut in an M4-spec upper receiver effectively extends the ramps downward (theyre lowered). Additionally, in this increasingly specialized world of AR-15 parts that we live in, there are proprietary feed ramp cuts used for some alternate cartridges, such as .458 SOCOM. Does not include parts to complete the assembly. Comes with the standard features of a Mil-Spec upper receiver and is forged from 7075-T6 aluminum with a black hard coat anodized, tough finish. BioM Biotech Cluster Development GmbH - BioM This consent is for displaying external media content provided by Podigee. So, I had purchased a 458 upper. A2 Receiver with M4 Ramps | PK Firearms Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. [Parts] Brownells C7 Stripped Upper - No M4 feed ramps - Reddit Session cookie used for anti spam (technical cookie). Im no A1 s Luth has upped their manufacturing, this newer model has the m4 feed ramps and is milled to spec, the barrel nut lines up perfect to the bolt (they had issues in the past) and all parts fit as expected. The old original A2 uppers are getting fewer and farther in between. You can count on the same quality M4 feed ramps, forward-assist assembly and ejection port cover assemblies already in place. Dec 17, 2020. They guide the bullet up and into the chamber. Rock River Arms A2 Upper Receiver with M4 Ramps | PK Firearms The information provided here does not represent the views of Cheaper Than Dirt! Well, at least the ones in pristine condition. Any use of this content without express written consent is prohibited. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. Somwhere in the 1990s I believe, Colt designed the M4 feed ramps, where they took some of the material out of the upper receiver, cut two little ramps in it and then cut the ramps in the barrel extention a little further forward. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. Copyright 2016 - 2023 by AdventureFootstep.com. The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. Search . I'd argue find an A2 upper with M4 cuts and an M4 barrel and go that route. I'd recommend to only do that if the A2 upper is of new manufacture. The carry handle dimmensions look way off when looking down the rear sight because one side is super thin and the other side looks fine. TNVC/NGI Giveaway: 15 winners with over $7000 worth of prizes!! Another reason is that any commercial receiver and parts makers want to tool up to make upper receivers and barrel extensions, especially when shorter guns are becoming more popular. Luth-AR AR-15 A1 Stripped Upper Receiver w/ M4 Feed Ramp has been discontinued by Luth-AR and is no longer available.

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