I took the SAAMI specs and designed a chamber flag that will accurately index in the same place regardless if you use .223/5.56 or .300 Blackout. Because it indexes on the datum line of each cartridge it will always stick out the same amount. Modeled a hole for use with keyring flags and a groove for manual retraction.
WARNING: Do not print with standard resins or this will shatter if you send the bolt home! If you want to print using resin, use a tough semi-flexible type like Siraya Tech Blu.
PLA can work but is not advisable for a hot chamber.
Recommend printing this in Nylon or ABS.
AR-15 Chamber Flag for 5.56 .223 .300
by skore87 · original on Printables ↗
Sports & Outdoor / Outdoor Sports
♥ 229⬇ 1.7k🖨 9 prints
Print profiles
300_556_chamber_flag_v4.stlDEFAULT
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
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300_556_chamber_flag_v4_flat.stl
⏱ time and weight estimated after preparation · 1 material(s)
Made to order: we prepare this file when you order, which adds a few minutes before printing starts.
Prints on: A1 mini 0.4PLA
Order this print