9MM Blowback AR-15 Upper

built and tested...testing a 9MM upper build for one of my SBRs.

The build

Spikes Tactical no logo lower
CMMG MK4 upper receiver
CMMG EM4 handguard
Faxon 4.5" 9mm barrel
Kaw Valley Precision 9mm AR bolt
Kaw Valley Precision 10oz buffer weight
CMMG zero'd flash hider
CMMG zero'd dust cover
Trinity force stock
Tactical galaxy trigger guard
Franklin Armory proprietary ambi safety selector with 2 long paddles
AT3 FU-bag ( springs and detents )
Tactical Galaxy mil-spec buffer tube
Franklin Armory heavy recoil spring
Tactical Galaxy ambi charging handle
Fortis Manufacturing end plate and castle nut K1
sentry manufacturing / hex-mag over molded grip
Tactical Galaxy mil-spec takedown pins
Tactical Galaxy anti walk pins
Tactical Galaxy mag release bar
Battle Arms mag release button
Battle Arms enhanced bolt catch
Primary Arms MD-RBGII Classic Series Gen II*
Sig Romeo gen 1 mount w/ cheap T1 QD lever

Trigger***
franklin armory binary BFS-III System *

( franklin heavy recoil buffer spring, red lightweight trigger spring*, sprinco enhanced hammer spring**, franklin enhanced disconnector spring***, proprietary ambi safety selector )

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almost 400 rounds down range in 1 session, besides 1 magazine not allowing the bolt to chamber rounds the mean arms mag completely got the gun up and running, semi and binary firing, last round bolt hold open. brass, copper, aluminum, and hollow point ammo was used. various weights, and configurations of the ammo was used to determine under uncommon conditions or not optimal ammo loading would it function.

the firearm was shot in a safe and legal manner at an authorized facility!
tore down and disassembled, cleaned in a safe manner without ammo or magazine.

no links are listed, Im not selling anything! this is to help anyone troubleshoot AR-9 / PCC problems they might have. as well as a review of products.

as stated in the video I'm not sponsored, im not monetized, I dont work for anyone in the industry, nothing was sent to me, nothing was lent to me, there are no affiliated links, no ambassador codes, I am not promoting the sell of an item only showcasing my experiences. some receipts are screenshot from my emails and accounts from various retailers / vendors showing part numbers, item numbers, dates, skus ectara hopefully showing proof and clarity about quality and honesty of the products used! I don't to have to show love to anyone or anything I spent my hard earned! I tried to be thorough to answer and questions that might get asked. I'm a regular man I'm not trying to persuade you to purchase from any outlet / store / vendor listed! Im not trying to gain any manufacture or vendors favor! with the info in the video you should search around find what for what works for you.

this is a 1 or 1 sample results may vary!