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This. There's no reason why they wouldn't work. .300 Blk is just a .223 case necked up to take the .30 cal bullet.I don't see why it wouldn't. Same diameter case. Similar OAL.
Yeah, just swapping uppers is easy enough. However, I've got a pinned/welded 14.5 - so a 10.5 really doesn't interest me too much. At they end of the day, they wouldn't be all that much different.The nice thing is you can always get another upper. I might try it some day. I went the 10.5 route. Agree that 5.56 is not 7.5 worthy.
Do you people have any idea how much money NES costs me. Damn you people!! Lol
Tromix Restricted State, Compliant Magazines - Tromix Lead Delivery SystemsNow - looking at 458 SOCOM or 450 Bushmaster, that may be worthy of another build. IIRC there are 30rd mag bodies with a specific follower for the big bore rounds. Something like 10rds of 458 fits in a 30rd mag body. Just imagine how much of a thumper a 458 pistol would be!
I disagree--7.5" is perfectly fine with 5.56. Mine groups beautifully at 50 yards, and the only reason I haven't stretched it out to 100 yet is a.) laziness and b.) lack of time to get back to the range. It's an eminently workable CQB upper. Ideal for home defense, though with all carry and HD guns I would make sure to put a couple hundred rounds of your ammo of choice through it to ensure reliability and to know how it performs.Agree that 5.56 is not 7.5 worthy.
Maybe in the future, as of right now we are overwhelmed with making the standard caliber platform. We only have one CNC machine unfortunately.You're very welcome. Both Fixed mag lowers are JC lowers, very happy with them. Thank you for a quality product. Any thoughts of making AR10's?
IANAL, but I'm gonna say no. Read up on the JC Arms case where the cops destroyed a fixed magazine to remove it and put their own standard cap mag in its place.
Let us know how top loading the Glock mag works. Keep a baseplate tool handy in case you get a jam.View attachment 284066 A quick dry fit with the 80 percent 9mm lower. I think this will turn out pretty darn good. Love the looks of it. Could do a pistol tube buffer instead but I do like the SBA3 braces. Preban glock fun mag stuffed in there for a test. Would look more balanced with a smaller mag. A reflex sight would do well or the Holosun one I use on another which is of very good quality. When it gets built it will probably get my own version of a fixed 10 rd glock mag with a drill, tap, and weld.
It all depends on the lower. Was it pistol? If so then ok. Was it rifle? Then no go.This pipe dream GTG or a problem?
Mass OK way to do it? Thanks...
- Pre-Healy lower purchased years ago on a 4473 but never built into anything. (not that pre-Healy means anything for a non-AWB build)
- Install fixed 10-round mag, then assemble rest of the lower.
- Pistol brace from one of the known vendors w/ ATF blessing.
- 10.5" upper in 300 BLK.
- EFA10 as a 30-cal non-high capacity pistol.
Then if 80%, 0%, multi cal go for it.
AFAIK when a lower is produced by a manufacturer it’s either rifle or pistol. I may be wrong on this.
Sounds like a good opportunity for an 80%.If it was 4473'd as "Other" then you're g2g, but honestly I wouldn't waste a good pre-Healey ban lower on fixed mag. Save it and get yourself a virgin new production lower.