What is an m4 feed ramp? It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. Amazing what happens in a thread over a simple question. *Must have a registered ARFCOM account to win. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Any use of this content without express written consent is prohibited. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. FN AR-15 5.56X45mm Nato . I can probably get the upper reciever first. This is one time it's better to go a little too far than to leave an edge for the . Issues can arise when receivers and barrel extensions are mismatched. Edited April 27, 2014 by Mark Gale
Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Now move move the on deck cartridge forward to the 3/8 of inch position and again note the position of the tip of the bullet in relationship to the barrel extension. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either.
AR-15 Feed Ramp Problems - School of the American Rifle And that is the important thing! The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! However, I have seen more than a few basement gunsmith hackjobs using a dremel, some Jack Daniels/liquid courage, and an unsteady hand that have made a total, unrepairable mess of the job. M4 barrel to non M4 receiver is fine, but not the other way around. Required fields are marked *. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. If you ever have an issue, then look at getting a correct barrel for the upper. Previous. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Notify me of follow-up comments by email. Copyright 1996-2023 AR15.COM LLC. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. Finding the proper upper receiver is your best option. Clear editor. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. is the m4 feedramp common in barrel extensions? That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. We want you, our readers, to be able to make informed decisions. Thank you for answering the question do well. Then the manufacturer discontinued the barrel.
Barrel FAQs | Ballistic Advantage SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock Insert the barrel and sharpie the cut area, then use the right bit on a dremel. I read in Bravo company that there are 2 kinds of flat top upper. Lol. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. This is a big tip, by the way, for pistol-caliber ARs. . Some suggest taking a grinder to the extension area. Metal cases ammunition such as Wolf through an M4 clone? Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 5. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. The mil actually only specs M4 feed ramps for use in its M4s.
If you have an account, sign in now to post with your account. After two months of back and forth, cleaned up the feed ramps.
For a better experience, please enable JavaScript in your browser before proceeding. Read Now. Jams and misfires. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. You absolutely do not want it the other way around however. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. With the bcg moving that much faster, the magazine springs were having a hard time supplying the rounds fast enough, AS WELL AS the tips of the rounds were digging into the feed ramps and catching. It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. All NFA rules apply. Seems M4 is all the rage these days. There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. I've seen that pic, it is a good reference. JavaScript is disabled. Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear.
How to Polish a Feedramp Quick and Easy | Firearms Talk Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Earlfillmore 13 hr. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler.
Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock If you have a m4 ramped upper but not barrel you can cause problems as there's a lip of steel barrel extension in the way that can cause feeding problems. A feed ramp is a basic feature of many breech loading cartridge firearm designs.
Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit can the barrel extension be bought individualy? They are better! Feels like a silly question now that it makes sense. It's best to use rifle/rifle combo or M4/M4. Editors Note: This article was originally published in January of 2019. May 17, 2008 in The Armorer. Description. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges.
M4 Feedramps - AR-15 Pro By using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. If this is your first visit, be sure to
M4 Feed ramps on barrel extensions are a solid example. By The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. I think your mistaking that with adding ramps to the receiver. Full M4 feed ramps start on the upper and continue onto the barrel extension. Can someone recommend or point me in the right direction of a good quality upper receiver for an SPR build that does not have M4 feed ramp cuts in it? M4 feed ramps were created during the development of the xM4 carbine for the original Army requirement of a carbine rifle that used the then current M16A2 upper receiver, 14.5" Barrel and had featured a collapsible sliding stock.
Feed Ramps -300BlkTalk Get The Best Trigger Pull Gauges To Make Every Shot Count. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Looking For Bear Creek Arsenal Barrels Review? Just put it in and shoot it. $101.95. Only took a few minutes. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. Thats why AR10s- And Scar heavies exist for. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. M4 ramps help in feeding in for carbine in full auto. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver?
M4 feed ramps. By my estimates, the tip of the bullet first hits the barrel extension about 1/3 of the way up the respective feed ramp on the barrel extension. Just because you can, doesn't mean you should. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Thanks! Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. My alternative plan is to do exactly as you describe. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. I found the article very informative. Single Action and Double Action Which One Is Better For You? I got my help from this thread, and thank you again to ORD. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. well.. it's kinda hard to get stuff in this part of the world. -The Barrel MUST be removed from the Upper Receiver in order to use this Kit.-Never cut or polish the aluminum M4 Feed Ramps in your upper receiver! The barrel extension and the receiver both have to have the cuts. It was in the last few issues of SAR.
CUTTING M4 RAMPS - YouTube M4 feed ramp barrel in a non M4 ramp upper - AR15.COM Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! In most cases the ramps only help during full auto mode while cycling at a high rate.
Shorter length equates to much higher pressure in the upper receiver. However, they do have M4 feed-ramps which is not clone correct. Use this M4 Barrel extention with M4 feedramps. 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 (they're lowered). You have the option of barrel type, thread, fluting, finish type and to add a match bolt. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect.