a. One hairline crack, not to exceed 1 in. (2.54 cm) in length, per side of buttstock
The buttstock is cracked in the critical area or does not meet the crack criteria.
b. Two additional hairline cracks up to 0.25 in. (0.64 cm) in length, per side of buttstock.
c. A total of three cracks per side of the buttstock, originating from the buttplate end, are allowable.
Cracks in the critical area at the front end of the buttstock are not acceptable.
Check buttstock assembly (12) for forward to rear movement and/or a 1/32 in. (0.079 cm) gap between the buttstock assembly (12) and the lower receiver (13). If forward to rear movement and/or a 1/32 in. (0.079 cm) gap appears, tighten self-locking screw. If still not tight, remove buttstock assembly and check for loose lower receiver extension. If loose evacuate to support maintenance. If not loose, replace buttplate (14).
Lower receiver extension cannot be tightened.
Change 4 2-17
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