AR-15 16" SPR Upper Build 6 ARC (1/5): Taking Barrel Measurements and Checking Headspace
Автор: Custom Guns and Reloading
Загружено: 2025-10-08
Просмотров: 92
AR-15 6 ARC SPR Upper Build With 16” 1:7 Mid-length Blackhole Weaponry Barrel
If anyone is curious about the difference in 6.5 grendel type 1 and type 2 bolts here it is, 6.5 Grendel Type 1 and Type 2 refers to the bolt face depth, with Type 2 (the SAAMI standard) using a deeper .136 inch depth for better case support and reliability, and Type 1 using a shallower .125 inch depth designed for the 7.62x39mm cartridge
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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16” Blackhole Weaponry 6 ARC build notes post:
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Barrel inspection notes:
Weight: 36.5oz
Gas system length: Mid-length
Gas port size: 0.086”
Gas block journal: .7505”
Barrel Extension: 0.9985”
Headspace gauge check (on fully stripped Radian bolt):
Go 1.1901”: closes
Field 1.201”: doesn’t close
#arbuild #gasgun #upperreceiver #upperbuild #AR15 #GunMaintenance #RifleCare #FirearmReliability
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