I might just test this out for sake of learning the effects, if nothing else. I mean, the rate needs to change and cutting them does accomplish that, but does removing coils change the rate in the desired way? The rate is effectively stiffened, but the buffer should also be able to travel further into the tube, so that's good, but there's also less stored energy and that's what's needed in the forward motion to get bolt locked with a round in the chamber. I have some extra springs and will consider this, but I'm not totally sold on the idea. One fellow claims to have completely fixed his subsonic cycling issues by trimming coils from the buffer spring. So, I don't think there's any progress to be made with adjusting gas port sizes. Measuring the gas port in the barrel, tube and gas block, the smallest ID of all is. From what I've read about others with cycling issues using the Remington 220 unsuppressed, it sounds like I'll be lucky for it to cycle reliably no matter what I do and it almost certainly will not lock the bolt open on last round. I have an H2 buffer on order, we'll see if that helps. I only shot four rounds with it and three times the bolt completely failed to grab a new round and once it did grab, but wedged it. My guess is the Remington is short stroking as shooting with it is a much softer/quieter experience. The Armscor 147gr cycled perfectly (except for once when a primer popped out and prevented the bolt from closing), but the Remington 220gr did not. Again, looking for first hand experience and apologies for any redundancy. I also used _ ammo and it wouldn't cycle". What I'd really like to hear is something like, "yes, I have/had/used this setup and I used _ ammo and it cycled perfectly. If I had to guess, I'd say that pretty much any 220gr subsonic would be a good place to start. Since the barrel is shorter than max dwell and from what I've read, I'm guessing that the general problems with a setup like this would lean towards being undergassed, which is why some people suggest using a heavy grain subsonic since the bullet-in-barrel duration will be longer, giving the burn more time to create gas/cycling energy. Let's also say that there are no gas block alignment issues. Let's say the setup is a 7.5" 1:8 twist barrel with a pistol length gas tube, non-adjustable gas block and carbine buffer(3oz)/tube/spring. The 300blk FAQ says ".and we have had good functioning results with AR barrels down to 6.2 inches", but everything else I've read says 8" is the minimum and I've found some 7.5" folks out there with cycling problems. Warranty only valid to original purchaser if purchased through website or authorized dealer.I apologize in advance for something that's probably been discussed a bunch, but I'm not quite finding it. Prices and/or specifications are subject to change without notice. To return a product, send with transportation prepaid, to: NOTE: This warranty does not cover products damaged or rendered defective due to accident, misuse, abuse, modification, water damage, neglect, reloading, improper handling or storage, or failure to follow instructions for use. Please DO NOT send ammunition without obtaining a RA number from our Customer Service Department. During the warranty period, we will (at our sole option) repair, replace or refund the purchase price of any defective part or product covered by this warranty when it is returned by the original owner with proof of purchase.Īll ammunition warranty claims must have a Return Authorization (RA) number assigned before acceptance at our facility for further examination. Be sure to retain lot numbers in the event there is an issue with your ammo.Īll Minuteman Munitions ammunition is warranted against material and workmanship defects for up to one (1) year from the purchase date. NOTE: If you do not have the lot number we CANNOT process your claim. In order to initiate a claim, please contact our Customer Service Department at with your ammunition lot number and the details of your issue including the firearm make and model. All ammunition warranty claims are handled on a case-by-case basis.
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