AR40 Build - First Run - Build Parts

Back with another budget PCC / large format pistol 40 S&W Glock build ASMR video. No price and link. Web lookup for current pricing.
Web retailers I usually buy from:
Palmetto State Armory
Primary Arms
Optics Planet
AR15 Discounts
Delta Team Tactical
Classic Firearms
Gunbroker
Amazon
eBay
Me/preteen son built - 90/10😝
Rex Silentium SEG H 45 Gen 2 can
Glock / ProMag magazines
R&D Precision 40 s&w bcg
Kaw Valley Precision 10 oz buffer
Aimaculate stock folder*
CMMG Zeroed bolt catch
FMK ar15 multi cal polymer lower
Sylvan Arms magwell block ****
Hitman Industries 4” 1/16 5/8x24
NewFrontier PCUPPER G2 LRBHO
Presma Tubular handguards
KVP XL Compensator
Breek Warhammer *
Mil-spec charging handle
Sig Sauer Romeo MSR green dot
ASC endplate + castle nut
KVP ar15 reduced power spring kit
Mil-spec FCU
BattleArms magazine catch
Presma ambi safety selector
6 position carbine buffer tube *
JE Machine Tech 8 position ***
KVP 9mm 308 xp carbine spring
Trinity Force 17 degree grip ***
Magpul BSM arm brace
Sierra 180 jhp a8460
PMC 165 989 fps fmj fp
Federal 180 fmj fp
Winchester 180 jhp
Hornady 180 jhp Subsonic **
Length of pull max - 12.5”
Trigger pull average - 4.5 lbs
Son hesitant to do a cheek weld on a new build and unable to keep a firm push/pull, keeps hitting shoulder pocket..
ASMR after range post
*not used
**misfeeds, not shown
***not shown, installed
**** electrical tape fixed the play