The way I see it is, one of the weak spots may lie with your no name 6-pos. buffer tube. Is it a Mil-Spec or commercial buffer tube? Regardless, I would recommend swapping it out with a BCM Mil-Spec 7075T6 6-pos. buffer tube. If your is already comparable to their's, keep it. The LPK is not so big a concern. What type of BCG are you planning on using (M16 or semi-auto)? I recommend using a M16 type BCG. Additionally, is the buffer a standard one or a "H" (heavy). If your barrel has a carbine length gas system, I recommend going with a "H" or maybe a "H2" buffer. If it has a mid-length gas system, you can stay with a standard buffer or use a "H" buffer.
I have a 14.5" Mid-length build I did earlier this year. Here are some of the specs on it.
Upper Receiver:
TGD Firearms Billet upper receiver (made by New Frontier Armory)
AIM Surplus NiB M16 Bolt Carrier Group
BCM Gunfighter Charging Handle w/ Mod 4 latch
BCM Standard 14.5" Mid Length Barrel, Stripped
BCM Low Profile Gas Block (steel with set screws) .750
Midwest Industries 12-inch Gen2 SS-Series One Piece Free Float Handguard - BLACK
Midwest Industries G2SS PANEL KIT (FDE)
JP Enterprises Compact Tactical Comp with Persuader Front End
MAGPUL MBUS front and rear sights
Aimpoint PRO
Lower Receiver:
TGD Firearms Billet lower receiver (made by New Frontier Armory)
PSA LPK w/ B5 Systems Pistol Grip (FDE)
ALG ACT Trigger
BCM 4-Position Mil-Spec Buffer Tube Assembly (standard carbine buffer)
B5 Systems SOPMOD stock (Mil-Spec)
Seekins Extended Bolt Release
Seekins Magazine Release
With the 14.5" mid-length barrel, NiB BCG, and the standard buffer, the system runs very smooth. So smooth that the first time I shot it I could not tell if the next round chambered or not. I had to visually check. It is probably one of the smoothest shooting AR s I have.




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