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(a) Align the holes in gas tube (12) and front sight assembly base (1 O).

(b) Using ball peen hammer and 5/64-inch diameter drive pin punch, drive spring pin (13) into front sight assembly base (10) to secure gas tube (12).

3-13. UPPER RECEIVER AND BARREL ASSEMBLY (CONT).

d. REASSEMBLY (CONT)

d. REASSEMBLY (CONT)

Install upper and lower handguards (16).

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