Mags that will reliably feed M855A1

[ABNAK]

M855A1 causing damage to feed ramps was basically fake news. You can find the thread on lightfighter still but basically someone took some photos way out of context and it blew up into something completely false.

Yeah the feed ramps but also the barrel extension, right before the round enters the chamber itself. Granted, if memory serves the chewed-up extension pic I saw was from a USMC M27 (HK).

[1168]

I’ve personally seen damage on an upper receiver for an M16a4 that looked like it could have been caused by the tips of ammo impacting It. The unit had beat to shit mags, and I was not impressed by their rifle maintenance. I have no way of verifying that the damage was caused by a1 ammo, but it IS what they were shooting. I kinda wonder if someone was having some sort of stoppage or something. It had no stoppages that day. This was a few years ago. Its been a non-issue in any other weapon that I’ve seen since, including other M16a4’s.

[markm]

It's around if you're willing to pay $2-3 per round.

Ammo requiring a specific mag is worth dog balls to me.

[MikhailBarracuda91]

It's also widely known that the port pressure is much higher on this round. It's extremely hard on the 416/m27.

Considering the port pressure on an M4 is 17,000 psi and on an M16 it's 10,000 PSI (M855 not A1)

it sounds like this round is hard on everything, the original m855 ammo already wore an M4 faster than an M16

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[1168]

Ammo requiring a specific mag is worth dog balls to me.

See above. I shoot a fair bit of this stuff, and I’m not convinced it REQUIRES a specific mag.

It's also widely known that the port pressure is much higher on this round. It's extremely hard on the 416/m27.

Considering the port pressure on an M4 is 17,000 psi and on an M16 it's 10,000 PSI (M855 not A1)

it sounds like this round is hard on everything, the original m855 ammo already wore an M4 faster than an M16

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I measured an 88fps delta in 16”. 5 rnd each sample. Strangely, I haven’t seen a broken bolt in a while.

[Tony617]

Since the Okay Surefeed E2 has been mentioned, I obtained some of these, new in the wrapper, but haven't used them. From the pictures I have seen, they angle the round higher up, seemingly to avoid contact with the lower area of the feed ramp. I don't see this as a problem, but how would they work for XM193 or even normal M855?

I bought 10 of the Surefeed E2 magazines and I have shot XM193 just fine. I like the texture of magazines as well. I also have shot 60 rounds of Gold Dot JSP which also shoot fine. That was before the quarantine. I did go to the indoor range a few times and I shoot M193 rounds now since Gold Dot JSP are hard to come by now.

[MikhailBarracuda91]

See above. I shoot a fair bit of this stuff, and I’m not convinced it REQUIRES a specific mag.

I measured an 88fps delta in 16”. 5 rnd each sample. Strangely, I haven’t seen a broken bolt in a while.

I know it's very accurate ammo! Made to a very high standard in terms of the quantity it's manufactured in. I do recall hearing that it's meant to give similar ballistics to a 20" barrel while shooting it from a 14.5"

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[ABNAK]

See above. I shoot a fair bit of this stuff, and I’m not convinced it REQUIRES a specific mag.

I measured an 88fps delta in 16”. 5 rnd each sample. Strangely, I haven’t seen a broken bolt in a while.

IIRC didn't later lots of A1 get throttled back a tad to reduce some of the pressure?

[Wake27]

IIRC didn't later lots of A1 get throttled back a tad to reduce some of the pressure?

Yup.


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[vicious_cb]

I’ve personally seen damage on an upper receiver for an M16a4 that looked like it could have been caused by the tips of ammo impacting It. The unit had beat to shit mags, and I was not impressed by their rifle maintenance. I have no way of verifying that the damage was caused by a1 ammo, but it IS what they were shooting. I kinda wonder if someone was having some sort of stoppage or something. It had no stoppages that day. This was a few years ago. Its been a non-issue in any other weapon that I’ve seen since, including other M16a4’s.

M16A4 receivers dont have M4 feed ramps, having garbage mags with any ammo is eventually going to damage the receiver given enough rounds.