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Sons of Liberty Gun Works EXO3 Complete Upper Receiver 223/5.56 669185245165

Sons of Liberty Gun Works
Sons of Liberty Gun Works AR-15 Upper Receiver
Sons of Liberty Gun Works AR-15 Complete Upper Receiver
Sons of Liberty Gun Works EXO3 Complete Upper Receiver
Sons of Liberty Gun Works EXO3 Complete Upper Receiver

Sons of Liberty Gun Works EXO3 Complete Upper Receiver 223/5.56 669185245165

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Sons of Liberty Gun Works EXO3 Complete Upper Receiver 223/5.56 669185245165

Sons of Liberty Gun Works
Sons of Liberty Gun Works AR-15 Upper Receiver
Sons of Liberty Gun Works AR-15 Complete Upper Receiver
Sons of Liberty Gun Works EXO3 Complete Upper Receiver
Sons of Liberty Gun Works EXO3 Complete Upper Receiver

UPC
669185245165: MPN
EXO3UPPER-13.7-556-XL: Brand
Sons of Liberty Gun Works: Main Model
Sons of Liberty Gun Works EXO3 Complete Upper Receiver: Model
EXO3 Complete Upper Receiver: Caliber
223/5.56: Features
13" M-LOK Handguard, Picatinny Rail, 3/4" Gas Block, Combat Barrel: Type
Complete Upper Receiver: Action
Semi-Automatic: Finish
Black: Sight
None, Optic-Ready: Receiver
Aluminum: Muzzle
1/2"x28 TPI, A2 Flash Hider: Barrel Length
13.7"

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Recent comments

Remington 23728 UMC Full Metal Jacket FMJ 115 Grain 9mm Luger/Parabellum - 1000 Rd - $199.99

Sorry. My error. In my senility I overlooked your "lightweight" spring use. Those springs would certainly throw some codes and cause all sorts of experimentation. I'm still curious why the 124 Rem fails when the factory specs list identical velocities. Maybe the test barrel was longer. I'll have to chrono some. I have probably 15-20 9mm's on the rack, mostly alloy Sig and Beretta, some CZ and HK, Glock, S&W, FNH, etc., in hammer, striker and external extractor 1911 designs, use only duty weight springs, no subs or suppressors, no steel case, and don't shoot them as much anymore. They tend to be boringly reliable with major brands and reloads, with accuracy as the only variable. The Blazer was the only brand causing problems, and that out of a stiff M17. Oh, and a S&W SD9 which was such a POS that it became a test dummy.

25 min 54 sec ago Bynotsecretservice
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Remington 23728 UMC Full Metal Jacket FMJ 115 Grain 9mm Luger/Parabellum - 1000 Rd - $199.99

I can get it to run in a cz. Not in any striker fired pistol with their more radical cam. As you go to lower spring weight in striker fired other problems are introduced. I've tried. I've got 5 k of it.

With the 19 with factory spring it has failures to feed. Slide does not go fully to rear. With a 16 lb spring failures to go into battery. Say every fifth round.

If you go lighter in recoil springs with a Glock you have to lighten firing pin spring...not really wanting to go further down rabbit hole. I just wanted some range ammo not to respring my guns.

PSA micro is more or less same. Bought lighter springs for it too trying to get it to run.

Same guns run like sewing machines with Speer lawman or S&B.
Here is one discussion about UMC low power factor.
I was surprised used many UMC components over the years and they were fine. Still use many rem components.
I haven't chronoed it don't really care. Does not run in my primarie

Gonna take it gun show and dump it.

Care to share the firearms it runs in for you?

https://www.glock.pro/threads/remington-umc-9mm-luger-mega-pack-good-or-bad.1425/...

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