My first AR: 7.62x39 with Superlative Piston kit - Learning from failure...
I have never, ever heard of a round going off when chambering. In Iraq, the only negligent discharge that happened were from pulling a trigger on a loaded chamber with the safety off. I heard about several m-16’s, M9 pistol, m2 machine gun and mk19 weapon.
The clearing barrels were at the gates and the entrance to the chow hall.
Not saying it’s impossible, but nearly. [emoji38]
My dad recently bought one of the cheap bear creek 7.62x39 uppers. I had him get one of the (red x?) dedicated firing pins and it runs fine.
1 Attachment(s)
I also built AR47 and Superlative Piston Kit
So its cool reading your thread on it. I only discovered m4carbine.net after googling 7.62x39 AR.
I built mine earlier this year on a whim when I saw a 7.62x39 barrel on sale. The rest was built around it. At the heart is also a Superlative Arms Piston kit, I have only built piston driven firearms. So this was my 3rd time using SA, they're a bit hard to source. I did two range tests with the new AR47, one was barrel break-in and optic zero, the second range test was at rifle/pistol class and did it perform beautifully. The gas block is fully open and bolt lock back empty mag works great, its needs to be carbine length gas to get the bolt to cycle (I think SA also mentioned its not 300blk tested which could be why its not cycling properly depending on the gas system length.) I'm building a second very similar, its just lacking the SA piston kit. One is none and two is one as they say and with the price of 7.62x39 ammo, I bought a bunch in bulk. The only upgrades I have planned are to change the RDS and magnifier with a 1-4x24 FFP scope since I don't plan to go past 200/300 yards, I think 1-4x is good to get it to stretch out a bit.
Spikes Tactical - M4 Flat Top Upper w/o Forward Assist or port door
DEZ Arms. - AR-15 7.62x39 Match Grade Barrel 16” Military M4 Carbine
Aero Precision - VG6 Gamma 762 Muzzle Brake 5/8x24 TPI Anodized Black (2.24oz)
BAD - Rigidrail Handguard Mlok 13.7"
BCM - AR-15 Gunfighter Vertical Grip M-Lok Black
Aim Sports - AR-15 Charging Handle Standard Latch .223 Rem/5.56 NATO 7075-T6
Precision Firearms - 7.62x39 Bolt AR15, Enhanced Firing Pin, Firing Pin Retainer
Superlative Arms - Retrofit Piston Kit 0.750 Clamp On Adj. Gas Block - Carbine (normally I like the set screw and dimple the barrel but I get what I can find)
POF - Roller Cam Pin Assembly, 223, NP3 Coating
Lower Receiver
KE Arms - KP-15 Complete Lower Receiver upgraded with Spikes Tactical enhanced mil spec Trigger and Armaspec ambi safety)
Completed AR47 black
Attachment 65754