AR-15 16” SPR Upper Build 5.56 (3/6): Installing Barrel Into BCM Thermofit Upper

Amazon list for tools/supplies mentioned on the channel:
3QMZQX5CVKWR2

Upper build tools video (1/2):
   • AR-15 Upper Build Tools and Tips (1/2) #ar...  
Upper build tools video (2/2):
   • AR-15 Upper Build Tools - Items I Forgot T...  

Link to AR-15 upper build tools post:
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Link to AR-15 upper build steps post:
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Link to threadlockers and assembly grease post:
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Build list (note re: pricing, some of these parts were purchased during Holiday sales):
Upper receiver: BCM Demo Upper (# FLAT-TOP-UPPER-M4-DEMO) ($50) (thermofit)
BCG: Rubber City M-16 Blacknitride+ Bolt Carrier (# 100-002) ($80) + bolt from Radian Enhanced BCG (~$80) (Total: $160)
Gas tube: Rosco Intermediate Nitrided gas tube (comes with barrel)
Gas block: Rosco .750” V2 Set Screw Gas Block (# ROS-NGB-002) ($38)
Barrel: Rosco K9 16” 1:7 Intermediate 5.56 Nitrided 416R Barrel (# K9-16-HY-556-7-I) ($135)
Handguard (10.5” to 13.75”): KAK 13” Handguard (# MO-441-1010-006) ($110)
Charging handle: Breek Arms Warhammer Mod2 Micro Latch FDE (# BRK555FDE) ($40)
Muzzle device: Cross Machine Tool Tactical Combat Flash Comp (# CFC 556) ($79)
Total cost: $613

Barrel inspection notes:
Weight: 34.6 oz (2.2 lbs)
Gas system length: Intermediate
Gas port size: 0.088”
Gas block journal: 0.7505”
Barrel Extension: 0.9975”

Headspace gauge check (on fully stripped Radian bolt):
1.4636”: closes
1.4646”: doesn’t close

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