[Option]

Finally got my first GBBR (used)

I found this list of upgrade parts that should strengthen the durability and reliability of this gun. Thoughts on this list?

VFC Original Parts - Steel Trigger Set for HK416 / M4 GBB Series
VFC Original Parts - Steel Hammer & Disconnector Set for M4 / HK416 GBB Series
VFC Original Parts - Steel Bolt Catch for HK416 / M4 GBB
VFC Original Parts - Magazine Valve for HK416 / M4 GBB Series
VFC CQD Sling Mount
VFC Original Parts - Hop-Up Set for HK416 / M4 GBB Series
VFC M4 GBBR High Speed Buffer & Spring Set

Z-Parts Steel Bolt Carrier for Umarex / VFC HK416 GBB VFC-HK416-005
Z-Parts Z-Parts Steel Loading Nozzle Guide for Umarex / VFC HK416 GBB VFC-HK416-003
Z-Parts Steel Ambi Selector for Umarex / VFC HK416 & HK417 GBB VFC-HK416-008
Z-Parts Steel Barrel Lock for Umarex / VFC HK416 GBB VFC-HK416-004
Z-Parts 14.5 Inch Steel Outer Barrel for Umarex / VFC HK416 GBB VFC-HK416-002

Maple Leaf Daimond Hopup Rubber for Marui / WE GBB Pistol & VSR ( 70 )
Maple Leaf AEG Hop Tensioner ( OHM )
Madbull 363mm 6.03 tightbore barrel
RA-Tech NPAS plastic nozzle set (for VFC M4 416 GBB)